[{"language":[{"iso":"eng"}],"department":[{"_id":"26"}],"user_id":"60046","series_title":"Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn","_id":"25241","status":"public","editor":[{"last_name":"Wallaschek","full_name":"Wallaschek, Jörg","first_name":"Jörg"},{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"},{"first_name":"Maik","last_name":"Mracek","full_name":"Mracek, Maik"}],"type":"conference_editor","title":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","volume":180,"date_created":"2021-10-01T08:01:17Z","publisher":"Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn","date_updated":"2022-01-06T06:56:56Z","intvolume":"       180","citation":{"mla":"Wallaschek, Jörg, et al., editors. <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2006.","bibtex":"@book{Wallaschek_Hemsel_Mracek_2006, series={Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}, title={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, volume={180}, publisher={Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}, year={2006}, collection={Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn} }","short":"J. Wallaschek, T. Hemsel, M. Mracek, eds., Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2006.","apa":"Wallaschek, J., Hemsel, T., &#38; Mracek, M. (Eds.). (2006). <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (Vol. 180). Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn.","ieee":"J. Wallaschek, T. Hemsel, and M. Mracek, Eds., <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, vol. 180. Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2006.","chicago":"Wallaschek, Jörg, Tobias Hemsel, and Maik Mracek, eds. <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. Vol. 180. Verlagsschriftenreihe Des Heinz Nixdorf Instituts, Paderborn. Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn, 2006.","ama":"Wallaschek J, Hemsel T, Mracek M, eds. <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. Vol 180. Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn; 2006."},"year":"2006","publication_status":"published"},{"_id":"9532","department":[{"_id":"151"}],"series_title":"HNI Verlagsschriftenreihe","user_id":"55222","language":[{"iso":"eng"}],"publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference","status":"public","date_updated":"2022-01-06T07:04:16Z","date_created":"2019-04-29T08:47:33Z","author":[{"first_name":"C","full_name":"Becker, C","last_name":"Becker"},{"first_name":"S","last_name":"Wedman","full_name":"Wedman, S"},{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"}],"title":"Design and Construction of a 3D-Scanning-Laservibrometer","issue":"Band 180","place":"Paderborn, Germany","year":"2006","page":"481","citation":{"mla":"Becker, C., et al. “Design and Construction of a 3D-Scanning-Laservibrometer.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, p. 481.","short":"C. Becker, S. Wedman, T. Hemsel, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, p. 481.","bibtex":"@inproceedings{Becker_Wedman_Hemsel_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Design and Construction of a 3D-Scanning-Laservibrometer}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Becker, C and Wedman, S and Hemsel, Tobias}, year={2006}, pages={481}, collection={HNI Verlagsschriftenreihe} }","apa":"Becker, C., Wedman, S., &#38; Hemsel, T. (2006). Design and Construction of a 3D-Scanning-Laservibrometer. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (p. 481). Paderborn, Germany.","ieee":"C. Becker, S. Wedman, and T. Hemsel, “Design and Construction of a 3D-Scanning-Laservibrometer,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, p. 481.","chicago":"Becker, C, S Wedman, and Tobias Hemsel. “Design and Construction of a 3D-Scanning-Laservibrometer.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 481. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ama":"Becker C, Wedman S, Hemsel T. Design and Construction of a 3D-Scanning-Laservibrometer. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:481."}},{"user_id":"55222","department":[{"_id":"151"}],"_id":"9533","language":[{"iso":"eng"}],"keyword":["Piezoelectric transducer"],"type":"journal_article","publication":"Ultrasonics","status":"public","abstract":[{"text":"The design of piezoelectric transducers is usually based on single-objective optimization only. In most practical applications of piezoelectric transducers, however, there exist multiple design objectives that often are contradictory to each other by their very nature. It is impossible to find a solution at which each objective function gets its optimal value simultaneously. Our design approach is to first find a set of Pareto-optimal solutions, which can be considered to be best compromises among multiple design objectives. Among these Pareto-optimal solutions, the designer can then select the one solution which he considers to be the best one. In this paper we investigate the optimal design of a Langevin transducer. The design problem is formulated mathematically as a constrained multiobjective optimization problem. The maximum vibration amplitude and the minimum electrical input power are considered as optimization objectives. Design variables involve continuous variables (dimensions of the transducer) and discrete variables (the number of piezoelectric rings and material types). In order to formulate the optimization problem, the behavior of piezoelectric transducers is modeled using the transfer matrix method based on analytical models. Multiobjective evolutionary algorithms are applied in the optimization process and a set of Pareto-optimal designs is calculated. The optimized results are analyzed and the preferred design is determined. ","lang":"eng"}],"date_created":"2019-04-29T08:50:23Z","author":[{"full_name":"Fu, Bo","last_name":"Fu","first_name":"Bo"},{"last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias","first_name":"Tobias"},{"full_name":"Wallaschek, Jörg","last_name":"Wallaschek","first_name":"Jörg"}],"volume":"44, Supplement","date_updated":"2022-01-06T07:04:16Z","doi":"10.1016/j.ultras.2006.05.087","title":"Piezoelectric transducer design via multiobjective optimization","quality_controlled":"1","publication_identifier":{"issn":["0041-624X"]},"citation":{"apa":"Fu, B., Hemsel, T., &#38; Wallaschek, J. (2006). Piezoelectric transducer design via multiobjective optimization. <i>Ultrasonics</i>, <i>44</i>, <i>Supplement</i>, e747–e752. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.087\">https://doi.org/10.1016/j.ultras.2006.05.087</a>","short":"B. Fu, T. Hemsel, J. Wallaschek, Ultrasonics 44, Supplement (2006) e747–e752.","mla":"Fu, Bo, et al. “Piezoelectric Transducer Design via Multiobjective Optimization.” <i>Ultrasonics</i>, vol. 44, Supplement, 2006, pp. e747–52, doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.087\">10.1016/j.ultras.2006.05.087</a>.","bibtex":"@article{Fu_Hemsel_Wallaschek_2006, title={Piezoelectric transducer design via multiobjective optimization}, volume={44, Supplement}, DOI={<a href=\"https://doi.org/10.1016/j.ultras.2006.05.087\">10.1016/j.ultras.2006.05.087</a>}, journal={Ultrasonics}, author={Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}, year={2006}, pages={e747–e752} }","chicago":"Fu, Bo, Tobias Hemsel, and Jörg Wallaschek. “Piezoelectric Transducer Design via Multiobjective Optimization.” <i>Ultrasonics</i> 44, Supplement (2006): e747–52. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.087\">https://doi.org/10.1016/j.ultras.2006.05.087</a>.","ieee":"B. Fu, T. Hemsel, and J. Wallaschek, “Piezoelectric transducer design via multiobjective optimization,” <i>Ultrasonics</i>, vol. 44, Supplement, pp. e747–e752, 2006.","ama":"Fu B, Hemsel T, Wallaschek J. Piezoelectric transducer design via multiobjective optimization. <i>Ultrasonics</i>. 2006;44, Supplement:e747-e752. doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.087\">10.1016/j.ultras.2006.05.087</a>"},"page":"e747 - e752","year":"2006"},{"citation":{"chicago":"Fu, Bo, Tobias Hemsel, and Jörg Wallaschek. “Multiobjective Optimization of Piezoelectric Transducers Using Evolutionary Algorithms.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 223–28. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ieee":"B. Fu, T. Hemsel, and J. Wallaschek, “Multiobjective optimization of piezoelectric transducers using evolutionary algorithms,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 223–228.","ama":"Fu B, Hemsel T, Wallaschek J. Multiobjective optimization of piezoelectric transducers using evolutionary algorithms. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:223-228.","apa":"Fu, B., Hemsel, T., &#38; Wallaschek, J. (2006). Multiobjective optimization of piezoelectric transducers using evolutionary algorithms. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 223–228). Paderborn, Germany.","mla":"Fu, Bo, et al. “Multiobjective Optimization of Piezoelectric Transducers Using Evolutionary Algorithms.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 223–28.","bibtex":"@inproceedings{Fu_Hemsel_Wallaschek_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Multiobjective optimization of piezoelectric transducers using evolutionary algorithms}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}, year={2006}, pages={223–228}, collection={HNI Verlagsschriftenreihe} }","short":"B. Fu, T. Hemsel, J. Wallaschek, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 223–228."},"page":"223-228","year":"2006","place":"Paderborn, Germany","issue":"Band 180","title":"Multiobjective optimization of piezoelectric transducers using evolutionary algorithms","date_created":"2019-04-29T08:52:41Z","author":[{"first_name":"Bo","last_name":"Fu","full_name":"Fu, Bo"},{"last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias","first_name":"Tobias"},{"last_name":"Wallaschek","full_name":"Wallaschek, Jörg","first_name":"Jörg"}],"date_updated":"2022-01-06T07:04:16Z","status":"public","type":"conference","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","language":[{"iso":"eng"}],"series_title":"HNI Verlagsschriftenreihe","user_id":"55222","department":[{"_id":"151"}],"_id":"9534"},{"issue":"Band 180","page":"183-186","citation":{"bibtex":"@inproceedings{Hemsel_Henning_Kauczor_Littmann_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Powder coating fabrication by ultrasonic standing wave atomizer}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Hemsel, Tobias and Henning, C and Kauczor, Christopher and Littmann, Walter}, year={2006}, pages={183–186}, collection={HNI Verlagsschriftenreihe} }","short":"T. Hemsel, C. Henning, C. Kauczor, W. Littmann, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 183–186.","mla":"Hemsel, Tobias, et al. “Powder Coating Fabrication by Ultrasonic Standing Wave Atomizer.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 183–86.","apa":"Hemsel, T., Henning, C., Kauczor, C., &#38; Littmann, W. (2006). Powder coating fabrication by ultrasonic standing wave atomizer. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 183–186). Paderborn, Germany.","ama":"Hemsel T, Henning C, Kauczor C, Littmann W. Powder coating fabrication by ultrasonic standing wave atomizer. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:183-186.","chicago":"Hemsel, Tobias, C Henning, Christopher Kauczor, and Walter Littmann. “Powder Coating Fabrication by Ultrasonic Standing Wave Atomizer.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 183–86. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ieee":"T. Hemsel, C. Henning, C. Kauczor, and W. Littmann, “Powder coating fabrication by ultrasonic standing wave atomizer,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 183–186."},"place":"Paderborn, Germany","year":"2006","date_created":"2019-04-29T08:59:10Z","author":[{"first_name":"Tobias","full_name":"Hemsel, Tobias","id":"210","last_name":"Hemsel"},{"first_name":"C","last_name":"Henning","full_name":"Henning, C"},{"first_name":"Christopher","last_name":"Kauczor","full_name":"Kauczor, Christopher"},{"first_name":"Walter","last_name":"Littmann","full_name":"Littmann, Walter"}],"date_updated":"2022-01-06T07:04:16Z","title":"Powder coating fabrication by ultrasonic standing wave atomizer","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference","status":"public","department":[{"_id":"151"}],"series_title":"HNI Verlagsschriftenreihe","user_id":"55222","_id":"9537","language":[{"iso":"eng"}]},{"year":"2006","place":"Paderborn, Germany","page":"313-322","citation":{"chicago":"Hemsel, Tobias, and Maik Mracek. “Control of Bundled Miniature Ultrasonic Linear Motors.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 313–22. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ieee":"T. Hemsel and M. Mracek, “Control of Bundled Miniature Ultrasonic Linear Motors,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 313–322.","ama":"Hemsel T, Mracek M. Control of Bundled Miniature Ultrasonic Linear Motors. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:313-322.","bibtex":"@inproceedings{Hemsel_Mracek_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Control of Bundled Miniature Ultrasonic Linear Motors}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Hemsel, Tobias and Mracek, Maik}, year={2006}, pages={313–322}, collection={HNI Verlagsschriftenreihe} }","short":"T. Hemsel, M. Mracek, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 313–322.","mla":"Hemsel, Tobias, and Maik Mracek. “Control of Bundled Miniature Ultrasonic Linear Motors.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 313–22.","apa":"Hemsel, T., &#38; Mracek, M. (2006). Control of Bundled Miniature Ultrasonic Linear Motors. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 313–322). Paderborn, Germany."},"issue":"Band 180","title":"Control of Bundled Miniature Ultrasonic Linear Motors","date_updated":"2022-01-06T07:04:16Z","author":[{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"},{"first_name":"Maik","last_name":"Mracek","full_name":"Mracek, Maik"}],"date_created":"2019-04-29T09:02:00Z","status":"public","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference","language":[{"iso":"eng"}],"_id":"9538","department":[{"_id":"151"}],"series_title":"HNI Verlagsschriftenreihe","user_id":"55222"},{"year":"2006","page":"e591 - e596","citation":{"short":"T. Hemsel, M. Mracek, J. Twiefel, P. Vasiljev, Ultrasonics 44, Supplement (2006) e591–e596.","bibtex":"@article{Hemsel_Mracek_Twiefel_Vasiljev_2006, title={Piezoelectric linear motor concepts based on coupling of longitudinal vibrations}, volume={44, Supplement}, DOI={<a href=\"https://doi.org/10.1016/j.ultras.2006.05.056\">10.1016/j.ultras.2006.05.056</a>}, number={0}, journal={Ultrasonics}, author={Hemsel, Tobias and Mracek, Maik and Twiefel, Jens and Vasiljev, Piotr}, year={2006}, pages={e591–e596} }","mla":"Hemsel, Tobias, et al. “Piezoelectric Linear Motor Concepts Based on Coupling of Longitudinal Vibrations.” <i>Ultrasonics</i>, vol. 44, Supplement, no. 0, 2006, pp. e591–96, doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.056\">10.1016/j.ultras.2006.05.056</a>.","apa":"Hemsel, T., Mracek, M., Twiefel, J., &#38; Vasiljev, P. (2006). Piezoelectric linear motor concepts based on coupling of longitudinal vibrations. <i>Ultrasonics</i>, <i>44</i>, <i>Supplement</i>(0), e591–e596. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.056\">https://doi.org/10.1016/j.ultras.2006.05.056</a>","ama":"Hemsel T, Mracek M, Twiefel J, Vasiljev P. Piezoelectric linear motor concepts based on coupling of longitudinal vibrations. <i>Ultrasonics</i>. 2006;44, Supplement(0):e591-e596. doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.056\">10.1016/j.ultras.2006.05.056</a>","ieee":"T. Hemsel, M. Mracek, J. Twiefel, and P. Vasiljev, “Piezoelectric linear motor concepts based on coupling of longitudinal vibrations,” <i>Ultrasonics</i>, vol. 44, Supplement, no. 0, pp. e591–e596, 2006.","chicago":"Hemsel, Tobias, Maik Mracek, Jens Twiefel, and Piotr Vasiljev. “Piezoelectric Linear Motor Concepts Based on Coupling of Longitudinal Vibrations.” <i>Ultrasonics</i> 44, Supplement, no. 0 (2006): e591–96. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.056\">https://doi.org/10.1016/j.ultras.2006.05.056</a>."},"publication_identifier":{"issn":["0041-624X"]},"quality_controlled":"1","issue":"0","title":"Piezoelectric linear motor concepts based on coupling of longitudinal vibrations","doi":"10.1016/j.ultras.2006.05.056","date_updated":"2022-01-06T07:04:16Z","volume":"44, Supplement","date_created":"2019-04-29T09:03:50Z","author":[{"first_name":"Tobias","last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias"},{"first_name":"Maik","last_name":"Mracek","full_name":"Mracek, Maik"},{"first_name":"Jens","full_name":"Twiefel, Jens","last_name":"Twiefel"},{"full_name":"Vasiljev, Piotr","last_name":"Vasiljev","first_name":"Piotr"}],"abstract":[{"text":"Classically, rotary motors with gears and spindle mechanisms are used to achieve translatory motion. In means of miniaturization and weight reduction piezoelectric linear motors are of interest. Several ultrasonic linear motors found in literature base on the use of two different vibration modes. Most often flexural and longitudinal modes are combined to achieve an elliptic micro-motion of surface points. This micro-motion is converted to direct linear (or translatory) motion of a driven slider. To gain high amplitudes of the micro-motion and thus having a powerful motor, the ultrasonic vibrator should be driven near the eigenfrequency of its modes. Additionally, low mechanical and electrical losses lead to increased efficiency and large amplitude magnification in resonance. This demands a geometrical design that fits the eigenfrequencies of the two different modes. A frequency-deviation of only a few percent leads to non-acceptable disturbance of the elliptical motion. Thus, the mechanical design of the vibrators has to be done very carefully. Within this contribution we discuss different motor designs based on the coupling of two the same longitudinal vibrations within one structure to generate an elliptic motion of surface points. Different concepts based on piezoelectric plates and Langevin transducers are compared. Benefits and drawbacks against the combination of longitudinal and bending modes will be discussed. Numerical results of the stator vibration as well as motor characteristics are validated by measurements on different prototypes. ","lang":"eng"}],"status":"public","publication":"Ultrasonics","type":"journal_article","keyword":["Piezoelectric linear motor"],"language":[{"iso":"eng"}],"_id":"9539","department":[{"_id":"151"}],"user_id":"55222"},{"quality_controlled":"1","issue":"Band 180","year":"2006","place":"Paderborn, Germany","citation":{"apa":"Hemsel, T., &#38; Priya, S. (2006). Model Based Analysis of Piezoelectric Transformers. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 223–228). Paderborn, Germany.","mla":"Hemsel, Tobias, and S. Priya. “Model Based Analysis of Piezoelectric Transformers.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 223–28.","short":"T. Hemsel, S. Priya, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 223–228.","bibtex":"@inproceedings{Hemsel_Priya_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Model Based Analysis of Piezoelectric Transformers}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Hemsel, Tobias and Priya, S}, year={2006}, pages={223–228}, collection={HNI Verlagsschriftenreihe} }","ieee":"T. Hemsel and S. Priya, “Model Based Analysis of Piezoelectric Transformers,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 223–228.","chicago":"Hemsel, Tobias, and S Priya. “Model Based Analysis of Piezoelectric Transformers.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 223–28. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ama":"Hemsel T, Priya S. Model Based Analysis of Piezoelectric Transformers. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:223-228."},"page":"223-228","date_updated":"2022-01-06T07:04:16Z","author":[{"first_name":"Tobias","full_name":"Hemsel, Tobias","id":"210","last_name":"Hemsel"},{"first_name":"S","last_name":"Priya","full_name":"Priya, S"}],"date_created":"2019-04-29T09:04:55Z","title":"Model Based Analysis of Piezoelectric Transformers","type":"conference","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","status":"public","_id":"9540","user_id":"55222","series_title":"HNI Verlagsschriftenreihe","department":[{"_id":"151"}],"language":[{"iso":"eng"}]},{"abstract":[{"text":"Piezoelectric transformers are increasingly getting popular in the electrical devices owing to several advantages such as small size, high efficiency, no electromagnetic noise and non-flammable. In addition to the conventional applications such as ballast for back light inverter in notebook computers, camera flash, and fuel ignition several new applications have emerged such as AC/DC converter, battery charger and automobile lighting. These new applications demand high power density and wide range of voltage gain. Currently, the transformer power density is limited to $40 W/cm{^3}$ obtained at low voltage gain. The purpose of this study was to investigate a transformer design that has the potential of providing higher power density and wider range of voltage gain. The new transformer design utilizes radial mode both at the input and output port and has the unidirectional polarization in the ceramics. This design was found to provide 30 W power with an efficiency of 98\\% and 30 $\\,^{\\circ}$C temperature rise from the room temperature. An electro-mechanical equivalent circuit model was developed to describe the characteristics of the piezoelectric transformer. The model was found to successfully predict the characteristics of the transformer. Excellent matching was found between the computed and experimental results. The results of this study will allow to deterministically design unipoled piezoelectric transformers with specified performance. It is expected that in near future the unipoled transformer will gain significant importance in various electrical components.","lang":"eng"}],"status":"public","type":"journal_article","publication":"Ultrasonics","keyword":["Piezoelectric transformers"],"language":[{"iso":"eng"}],"_id":"9541","user_id":"55222","department":[{"_id":"151"}],"year":"2006","citation":{"ama":"Hemsel T, Priya S. Model based analysis of piezoelectric transformers. <i>Ultrasonics</i>. 2006;44, Supplement(0):e741-e745. doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.086\">10.1016/j.ultras.2006.05.086</a>","ieee":"T. Hemsel and S. Priya, “Model based analysis of piezoelectric transformers,” <i>Ultrasonics</i>, vol. 44, Supplement, no. 0, pp. e741–e745, 2006.","chicago":"Hemsel, Tobias, and S Priya. “Model Based Analysis of Piezoelectric Transformers.” <i>Ultrasonics</i> 44, Supplement, no. 0 (2006): e741–45. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.086\">https://doi.org/10.1016/j.ultras.2006.05.086</a>.","bibtex":"@article{Hemsel_Priya_2006, title={Model based analysis of piezoelectric transformers}, volume={44, Supplement}, DOI={<a href=\"https://doi.org/10.1016/j.ultras.2006.05.086\">10.1016/j.ultras.2006.05.086</a>}, number={0}, journal={Ultrasonics}, author={Hemsel, Tobias and Priya, S}, year={2006}, pages={e741–e745} }","short":"T. Hemsel, S. Priya, Ultrasonics 44, Supplement (2006) e741–e745.","mla":"Hemsel, Tobias, and S. Priya. “Model Based Analysis of Piezoelectric Transformers.” <i>Ultrasonics</i>, vol. 44, Supplement, no. 0, 2006, pp. e741–45, doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.086\">10.1016/j.ultras.2006.05.086</a>.","apa":"Hemsel, T., &#38; Priya, S. (2006). Model based analysis of piezoelectric transformers. <i>Ultrasonics</i>, <i>44</i>, <i>Supplement</i>(0), e741–e745. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.086\">https://doi.org/10.1016/j.ultras.2006.05.086</a>"},"page":"e741 - e745","publication_identifier":{"issn":["0041-624X"]},"quality_controlled":"1","issue":"0","title":"Model based analysis of piezoelectric transformers","doi":"10.1016/j.ultras.2006.05.086","date_updated":"2022-01-06T07:04:16Z","date_created":"2019-04-29T09:22:21Z","author":[{"first_name":"Tobias","last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias"},{"first_name":"S","full_name":"Priya, S","last_name":"Priya"}],"volume":"44, Supplement"},{"citation":{"apa":"Lierke, E. G., &#38; Hemsel, T. (2006). Focusing cross-fire applicator for ultrasonic hyperthermia of tumors. <i>Ultrasonics</i>, <i>44</i>, <i>Supplement</i>, e341–e344. <a href=\"https://doi.org/10.1016/j.ultras.2006.07.004\">https://doi.org/10.1016/j.ultras.2006.07.004</a>","mla":"Lierke, E. G., and Tobias Hemsel. “Focusing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors.” <i>Ultrasonics</i>, vol. 44, Supplement, 2006, pp. e341–44, doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.07.004\">10.1016/j.ultras.2006.07.004</a>.","bibtex":"@article{Lierke_Hemsel_2006, title={Focusing cross-fire applicator for ultrasonic hyperthermia of tumors}, volume={44, Supplement}, DOI={<a href=\"https://doi.org/10.1016/j.ultras.2006.07.004\">10.1016/j.ultras.2006.07.004</a>}, journal={Ultrasonics}, author={Lierke, E.G. and Hemsel, Tobias}, year={2006}, pages={e341–e344} }","short":"E.G. Lierke, T. Hemsel, Ultrasonics 44, Supplement (2006) e341–e344.","ieee":"E. G. Lierke and T. Hemsel, “Focusing cross-fire applicator for ultrasonic hyperthermia of tumors,” <i>Ultrasonics</i>, vol. 44, Supplement, pp. e341–e344, 2006.","chicago":"Lierke, E.G., and Tobias Hemsel. “Focusing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors.” <i>Ultrasonics</i> 44, Supplement (2006): e341–44. <a href=\"https://doi.org/10.1016/j.ultras.2006.07.004\">https://doi.org/10.1016/j.ultras.2006.07.004</a>.","ama":"Lierke EG, Hemsel T. Focusing cross-fire applicator for ultrasonic hyperthermia of tumors. <i>Ultrasonics</i>. 2006;44, Supplement:e341-e344. doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.07.004\">10.1016/j.ultras.2006.07.004</a>"},"page":"e341 - e344","year":"2006","quality_controlled":"1","publication_identifier":{"issn":["0041-624X"]},"doi":"10.1016/j.ultras.2006.07.004","title":"Focusing cross-fire applicator for ultrasonic hyperthermia of tumors","date_created":"2019-04-29T09:27:27Z","author":[{"first_name":"E.G.","last_name":"Lierke","full_name":"Lierke, E.G."},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"}],"volume":"44, Supplement","date_updated":"2022-01-06T07:04:16Z","status":"public","abstract":[{"text":"An improved concept for ultrasonic hyperthermia of tumors is presented. This concept is based on past experience of a German government supported project [1], which ended in 1984. It offers a low cost alternative to common RF- and microwave methods for hyperthermia of tumors with volumes between 1 and 40 ml at treatment times between 30 and 60 min. Our new version of the system considerably improves the temperature suppression in the healthy tissue around the target area and enables the adjustment of the beam width to the actual tumor size and the field geometry to the depth and shape of the tumor. The applicator can be used for moderate hyperthermia with tissue overheating up to 10 K or for ablation therapy with short high temperature pulses. Its central area is free for the integration of a commercial ultrasonic diagnostic sector scanner or a Doppler flow sensor in order to support the adjustment of the transducer and to monitor the whole area during the therapy.","lang":"eng"}],"type":"journal_article","publication":"Ultrasonics","language":[{"iso":"eng"}],"keyword":["Moderate hyperthermia"],"user_id":"55222","department":[{"_id":"151"}],"_id":"9543"},{"place":"Paderborn, Germany","year":"2006","page":"215-222","citation":{"apa":"Lierke, E.-G., &#38; Hemsel, T. (2006). Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 215–222). Paderborn, Germany.","bibtex":"@inproceedings{Lierke_Hemsel_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Lierke, Ernst-Günter and Hemsel, Tobias}, year={2006}, pages={215–222}, collection={HNI Verlagsschriftenreihe} }","short":"E.-G. Lierke, T. Hemsel, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 215–222.","mla":"Lierke, Ernst-Günter, and Tobias Hemsel. “Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 215–22.","ama":"Lierke E-G, Hemsel T. Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:215-222.","chicago":"Lierke, Ernst-Günter, and Tobias Hemsel. “Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 215–22. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ieee":"E.-G. Lierke and T. Hemsel, “Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 215–222."},"issue":"Band 180","title":"Focussing Cross-Fire Applicator for Ultrasonic Hyperthermia of Tumors","date_updated":"2022-01-06T07:04:16Z","date_created":"2019-04-29T09:29:01Z","author":[{"first_name":"Ernst-Günter","last_name":"Lierke","full_name":"Lierke, Ernst-Günter"},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"}],"status":"public","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference","language":[{"iso":"eng"}],"_id":"9544","department":[{"_id":"151"}],"user_id":"55222","series_title":"HNI Verlagsschriftenreihe"},{"language":[{"iso":"eng"}],"_id":"9545","department":[{"_id":"151"}],"user_id":"55222","series_title":"HNI Verlagsschriftenreihe","status":"public","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference","title":"Powder Transport by Ultrasonic Waves","date_updated":"2022-01-06T07:04:16Z","date_created":"2019-04-29T09:31:58Z","author":[{"full_name":"Mracek, B","last_name":"Mracek","first_name":"B"},{"first_name":"Tobias","id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel"},{"last_name":"Mracek","full_name":"Mracek, Maik","first_name":"Maik"}],"year":"2006","place":"Paderborn, Germany","page":"177-182","citation":{"bibtex":"@inproceedings{Mracek_Hemsel_Mracek_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Powder Transport by Ultrasonic Waves}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Mracek, B and Hemsel, Tobias and Mracek, Maik}, year={2006}, pages={177–182}, collection={HNI Verlagsschriftenreihe} }","short":"B. Mracek, T. Hemsel, M. Mracek, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 177–182.","mla":"Mracek, B., et al. “Powder Transport by Ultrasonic Waves.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 177–82.","apa":"Mracek, B., Hemsel, T., &#38; Mracek, M. (2006). Powder Transport by Ultrasonic Waves. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 177–182). Paderborn, Germany.","ieee":"B. Mracek, T. Hemsel, and M. Mracek, “Powder Transport by Ultrasonic Waves,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 177–182.","chicago":"Mracek, B, Tobias Hemsel, and Maik Mracek. “Powder Transport by Ultrasonic Waves.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 177–82. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","ama":"Mracek B, Hemsel T, Mracek M. Powder Transport by Ultrasonic Waves. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:177-182."},"issue":"Band 180"},{"department":[{"_id":"151"}],"user_id":"55222","_id":"9546","language":[{"iso":"eng"}],"keyword":["Ultrasonic linear motor"],"publication":"Ultrasonics","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"Rotary ultrasonic motors have found broad industrial application in camera lens drives and other systems. Linear ultrasonic motors in contrast have only found limited applications. The main reason for the limited range of application of these very attractive devices seems to be their small force and power range. Attempts to build linear ultrasonic motors for high forces and high power applications have not been truly successful yet. To achieve larger force and higher power, multiple miniaturized motors can be combined. This approach, however, is not as simple as it appears at first glance. The electromechanical behaviour of the individual motors differs slightly due to manufacturing and assembly tolerances. The individual motor characteristics are strongly dependent on the driving parameters (frequency, voltage, temperature, pre-stress, etc.) and the driven load and the collective behaviour of the swarm of motors is not just the linear superposition of the individual drive's forces. Thus, the bundle of motors has to be synchronized and controlled appropriately in order to obtain an optimized drive that is not oversized and costly. We have investigated driving and control strategies of a set of linear ultrasonic motors. Our contribution will be divided into three main parts. In part I ultrasonic linear motors will be introduced. In part II driving strategies for a single motor as well as for a bundle of motors will be presented. These concepts will be verified by simulation results and experimental data. In part III a simplified model for the motor's electromechanical behaviour will be given."}],"volume":"44, Supplement","date_created":"2019-04-29T09:34:16Z","author":[{"first_name":"Maik","full_name":"Mracek, Maik","last_name":"Mracek"},{"full_name":"Hemsel, Tobias","id":"210","last_name":"Hemsel","first_name":"Tobias"}],"date_updated":"2022-01-06T07:04:16Z","doi":"10.1016/j.ultras.2006.05.201","title":"Synergetic driving concepts for bundled miniature ultrasonic linear motors","publication_identifier":{"issn":["0041-624X"]},"quality_controlled":"1","page":"e597 - e602","citation":{"bibtex":"@article{Mracek_Hemsel_2006, title={Synergetic driving concepts for bundled miniature ultrasonic linear motors}, volume={44, Supplement}, DOI={<a href=\"https://doi.org/10.1016/j.ultras.2006.05.201\">10.1016/j.ultras.2006.05.201</a>}, journal={Ultrasonics}, author={Mracek, Maik and Hemsel, Tobias}, year={2006}, pages={e597–e602} }","short":"M. Mracek, T. Hemsel, Ultrasonics 44, Supplement (2006) e597–e602.","mla":"Mracek, Maik, and Tobias Hemsel. “Synergetic Driving Concepts for Bundled Miniature Ultrasonic Linear Motors.” <i>Ultrasonics</i>, vol. 44, Supplement, 2006, pp. e597–602, doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.201\">10.1016/j.ultras.2006.05.201</a>.","apa":"Mracek, M., &#38; Hemsel, T. (2006). Synergetic driving concepts for bundled miniature ultrasonic linear motors. <i>Ultrasonics</i>, <i>44</i>, <i>Supplement</i>, e597–e602. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.201\">https://doi.org/10.1016/j.ultras.2006.05.201</a>","ama":"Mracek M, Hemsel T. Synergetic driving concepts for bundled miniature ultrasonic linear motors. <i>Ultrasonics</i>. 2006;44, Supplement:e597-e602. doi:<a href=\"https://doi.org/10.1016/j.ultras.2006.05.201\">10.1016/j.ultras.2006.05.201</a>","ieee":"M. Mracek and T. Hemsel, “Synergetic driving concepts for bundled miniature ultrasonic linear motors,” <i>Ultrasonics</i>, vol. 44, Supplement, pp. e597–e602, 2006.","chicago":"Mracek, Maik, and Tobias Hemsel. “Synergetic Driving Concepts for Bundled Miniature Ultrasonic Linear Motors.” <i>Ultrasonics</i> 44, Supplement (2006): e597–602. <a href=\"https://doi.org/10.1016/j.ultras.2006.05.201\">https://doi.org/10.1016/j.ultras.2006.05.201</a>."},"year":"2006"},{"page":"167-172","intvolume":"       113","citation":{"short":"M. Mracek, P. Vasiljev, T. Hemsel, J. Wallaschek, Solid State Phenomena 113 (2006) 167–172.","mla":"Mracek, Maik, et al. “Self Configuration of a Novel Miniature Ultrasonic Linear Motor.” <i>Solid State Phenomena</i>, vol. 113, Trans Tech Publ, 2006, pp. 167–72.","bibtex":"@article{Mracek_Vasiljev_Hemsel_Wallaschek_2006, title={Self configuration of a novel miniature ultrasonic linear motor}, volume={113}, journal={Solid State Phenomena}, publisher={Trans Tech Publ}, author={Mracek, Maik and Vasiljev, Piotr and Hemsel, Tobias and Wallaschek, Jörg}, year={2006}, pages={167–172} }","apa":"Mracek, M., Vasiljev, P., Hemsel, T., &#38; Wallaschek, J. (2006). Self configuration of a novel miniature ultrasonic linear motor. <i>Solid State Phenomena</i>, <i>113</i>, 167–172.","ama":"Mracek M, Vasiljev P, Hemsel T, Wallaschek J. Self configuration of a novel miniature ultrasonic linear motor. <i>Solid State Phenomena</i>. 2006;113:167-172.","chicago":"Mracek, Maik, Piotr Vasiljev, Tobias Hemsel, and Jörg Wallaschek. “Self Configuration of a Novel Miniature Ultrasonic Linear Motor.” <i>Solid State Phenomena</i> 113 (2006): 167–72.","ieee":"M. Mracek, P. Vasiljev, T. Hemsel, and J. Wallaschek, “Self configuration of a novel miniature ultrasonic linear motor,” <i>Solid State Phenomena</i>, vol. 113, pp. 167–172, 2006."},"year":"2006","quality_controlled":"1","title":"Self configuration of a novel miniature ultrasonic linear motor","volume":113,"date_created":"2019-04-29T09:35:31Z","author":[{"last_name":"Mracek","full_name":"Mracek, Maik","first_name":"Maik"},{"first_name":"Piotr","last_name":"Vasiljev","full_name":"Vasiljev, Piotr"},{"full_name":"Hemsel, Tobias","id":"210","last_name":"Hemsel","first_name":"Tobias"},{"last_name":"Wallaschek","full_name":"Wallaschek, Jörg","first_name":"Jörg"}],"publisher":"Trans Tech Publ","date_updated":"2022-01-06T07:04:16Z","status":"public","publication":"Solid State Phenomena","type":"journal_article","language":[{"iso":"eng"}],"department":[{"_id":"151"}],"user_id":"55222","_id":"9547"},{"doi":"doi:10.1115/IMECE2006-14862","title":"Model based design of piezoelectric generators utilizing geometrical and material properties","author":[{"full_name":"Richter, Björn","last_name":"Richter","first_name":"Björn"},{"full_name":"Twiefel, Jens","last_name":"Twiefel","first_name":"Jens"},{"first_name":"Tobias","last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias"},{"last_name":"Wallaschek","full_name":"Wallaschek, Jörg","first_name":"Jörg"}],"date_created":"2019-04-29T09:37:45Z","date_updated":"2022-01-06T07:04:16Z","citation":{"apa":"Richter, B., Twiefel, J., Hemsel, T., &#38; Wallaschek, J. (2006). Model based design of piezoelectric generators utilizing geometrical and material properties. In <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>. Chicago, Illinois, USA. <a href=\"https://doi.org/doi:10.1115/IMECE2006-14862\">https://doi.org/doi:10.1115/IMECE2006-14862</a>","short":"B. Richter, J. Twiefel, T. Hemsel, J. Wallaschek, in: ASME 2006 International Mechanical Engineering Congress and Exposition, Chicago, Illinois, USA, 2006.","bibtex":"@inproceedings{Richter_Twiefel_Hemsel_Wallaschek_2006, place={Chicago, Illinois, USA}, title={Model based design of piezoelectric generators utilizing geometrical and material properties}, DOI={<a href=\"https://doi.org/doi:10.1115/IMECE2006-14862\">doi:10.1115/IMECE2006-14862</a>}, booktitle={ASME 2006 International Mechanical Engineering Congress and Exposition}, author={Richter, Björn and Twiefel, Jens and Hemsel, Tobias and Wallaschek, Jörg}, year={2006} }","mla":"Richter, Björn, et al. “Model Based Design of Piezoelectric Generators Utilizing Geometrical and Material Properties.” <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>, 2006, doi:<a href=\"https://doi.org/doi:10.1115/IMECE2006-14862\">doi:10.1115/IMECE2006-14862</a>.","ieee":"B. Richter, J. Twiefel, T. Hemsel, and J. Wallaschek, “Model based design of piezoelectric generators utilizing geometrical and material properties,” in <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>, 2006.","chicago":"Richter, Björn, Jens Twiefel, Tobias Hemsel, and Jörg Wallaschek. “Model Based Design of Piezoelectric Generators Utilizing Geometrical and Material Properties.” In <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>. Chicago, Illinois, USA, 2006. <a href=\"https://doi.org/doi:10.1115/IMECE2006-14862\">https://doi.org/doi:10.1115/IMECE2006-14862</a>.","ama":"Richter B, Twiefel J, Hemsel T, Wallaschek J. Model based design of piezoelectric generators utilizing geometrical and material properties. In: <i>ASME 2006 International Mechanical Engineering Congress and Exposition</i>. Chicago, Illinois, USA; 2006. doi:<a href=\"https://doi.org/doi:10.1115/IMECE2006-14862\">doi:10.1115/IMECE2006-14862</a>"},"year":"2006","place":"Chicago, Illinois, USA","quality_controlled":"1","language":[{"iso":"eng"}],"keyword":["Materials properties","Design","Generators"],"department":[{"_id":"151"}],"user_id":"55222","_id":"9548","status":"public","abstract":[{"text":"This paper presents a general model based on the electromechanical circuit theory. The model is set up as a mechanical equivalent model for base excited systems and describes the behaviour of a piezoelectric element around one resonance frequency which is sufficient for most practical applications. The model is extended to obtain the influence of geometrical and material properties. The derivated properties are used to describe the parameters of the general model which is easy to handle. Using this model either the calculation of the output power on a specific electric load or the determination of the design of the used piezoelectric element for a needed electric output power is possible. The paper focuses on the design of the ratio of length and width of a piezoelectric bimorph. The validity of the model is shown by the comparison of computed and experimental results.","lang":"eng"}],"publication":"ASME 2006 International Mechanical Engineering Congress and Exposition","type":"conference"},{"issue":"Band 180","year":"2006","place":"Paderborn, Germany","citation":{"apa":"Schiedeck, F., &#38; Hemsel, T. (2006). Comparison of Piezoelectric and Shape Memory Alloy Based Actuators. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 239–242). Paderborn, Germany.","bibtex":"@inproceedings{Schiedeck_Hemsel_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Comparison of Piezoelectric and Shape Memory Alloy Based Actuators}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Schiedeck, Florian and Hemsel, Tobias}, year={2006}, pages={239–242}, collection={HNI Verlagsschriftenreihe} }","mla":"Schiedeck, Florian, and Tobias Hemsel. “Comparison of Piezoelectric and Shape Memory Alloy Based Actuators.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 239–42.","short":"F. Schiedeck, T. Hemsel, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 239–242.","ama":"Schiedeck F, Hemsel T. Comparison of Piezoelectric and Shape Memory Alloy Based Actuators. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:239-242.","ieee":"F. Schiedeck and T. Hemsel, “Comparison of Piezoelectric and Shape Memory Alloy Based Actuators,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 239–242.","chicago":"Schiedeck, Florian, and Tobias Hemsel. “Comparison of Piezoelectric and Shape Memory Alloy Based Actuators.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 239–42. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006."},"page":"239-242","date_updated":"2022-01-06T07:04:16Z","author":[{"first_name":"Florian","last_name":"Schiedeck","full_name":"Schiedeck, Florian"},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"}],"date_created":"2019-04-29T09:39:25Z","title":"Comparison of Piezoelectric and Shape Memory Alloy Based Actuators","type":"conference","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","status":"public","_id":"9549","series_title":"HNI Verlagsschriftenreihe","user_id":"55222","department":[{"_id":"151"}],"language":[{"iso":"eng"}]},{"quality_controlled":"1","page":"195-198","intvolume":"       113","citation":{"ama":"Schiedeck F, Hemsel T, Wallaschek J. The use of shape memory alloy wires in actuators. <i>Solid State Phenomena</i>. 2006;113:195-198.","ieee":"F. Schiedeck, T. Hemsel, and J. Wallaschek, “The use of shape memory alloy wires in actuators,” <i>Solid State Phenomena</i>, vol. 113, pp. 195–198, 2006.","chicago":"Schiedeck, Florian, Tobias Hemsel, and Jörg Wallaschek. “The Use of Shape Memory Alloy Wires in Actuators.” <i>Solid State Phenomena</i> 113 (2006): 195–98.","short":"F. Schiedeck, T. Hemsel, J. Wallaschek, Solid State Phenomena 113 (2006) 195–198.","bibtex":"@article{Schiedeck_Hemsel_Wallaschek_2006, title={The use of shape memory alloy wires in actuators}, volume={113}, journal={Solid State Phenomena}, publisher={Trans Tech Publ}, author={Schiedeck, Florian and Hemsel, Tobias and Wallaschek, Jörg}, year={2006}, pages={195–198} }","mla":"Schiedeck, Florian, et al. “The Use of Shape Memory Alloy Wires in Actuators.” <i>Solid State Phenomena</i>, vol. 113, Trans Tech Publ, 2006, pp. 195–98.","apa":"Schiedeck, F., Hemsel, T., &#38; Wallaschek, J. (2006). The use of shape memory alloy wires in actuators. <i>Solid State Phenomena</i>, <i>113</i>, 195–198."},"year":"2006","volume":113,"author":[{"full_name":"Schiedeck, Florian","last_name":"Schiedeck","first_name":"Florian"},{"id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel","first_name":"Tobias"},{"first_name":"Jörg","full_name":"Wallaschek, Jörg","last_name":"Wallaschek"}],"date_created":"2019-04-29T09:40:50Z","date_updated":"2022-01-06T07:04:16Z","publisher":"Trans Tech Publ","title":"The use of shape memory alloy wires in actuators","publication":"Solid State Phenomena","type":"journal_article","status":"public","department":[{"_id":"151"}],"user_id":"55222","_id":"9550","language":[{"iso":"eng"}]},{"title":"Energy harvesting with piezoelectric Elements","author":[{"first_name":"Jens","full_name":"Twiefel, Jens","last_name":"Twiefel"},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"},{"first_name":"Christopher","full_name":"Kauczor, Christopher","last_name":"Kauczor"}],"date_created":"2019-04-29T09:43:30Z","date_updated":"2022-01-06T07:04:16Z","page":"207-212","citation":{"ama":"Twiefel J, Hemsel T, Kauczor C. Energy harvesting with piezoelectric Elements. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:207-212.","ieee":"J. Twiefel, T. Hemsel, and C. Kauczor, “Energy harvesting with piezoelectric Elements,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, no. Band 180, pp. 207–212.","chicago":"Twiefel, Jens, Tobias Hemsel, and Christopher Kauczor. “Energy Harvesting with Piezoelectric Elements.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 207–12. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006.","short":"J. Twiefel, T. Hemsel, C. Kauczor, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, pp. 207–212.","bibtex":"@inproceedings{Twiefel_Hemsel_Kauczor_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Energy harvesting with piezoelectric Elements}, number={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Twiefel, Jens and Hemsel, Tobias and Kauczor, Christopher}, year={2006}, pages={207–212}, collection={HNI Verlagsschriftenreihe} }","mla":"Twiefel, Jens, et al. “Energy Harvesting with Piezoelectric Elements.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, no. Band 180, 2006, pp. 207–12.","apa":"Twiefel, J., Hemsel, T., &#38; Kauczor, C. (2006). Energy harvesting with piezoelectric Elements. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (pp. 207–212). Paderborn, Germany."},"place":"Paderborn, Germany","year":"2006","issue":"Band 180","language":[{"iso":"eng"}],"department":[{"_id":"151"}],"user_id":"55222","series_title":"HNI Verlagsschriftenreihe","_id":"9552","status":"public","publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference"},{"language":[{"iso":"eng"}],"department":[{"_id":"151"}],"user_id":"55222","_id":"9553","status":"public","abstract":[{"text":"In the design process of energy harvesting systems based on piezoelectric elements, achievable energy output is the most interesting factor. To estimate this amount a priori manufacturing of prototypes a mathematical model is very helpful. Within this contribution we will introduce a model based on electro-mechanical circuit theory. Its parameters are identified by measurements and the model is validated by comparison to experimental results. The model is designed to support the development-engineer in the dimensioning of energy harvesting units to specific application demands. Two main challenges in device design are investigated with the mathematical model: influence of the ambient excitation frequency, and influence of the load impedance. Typically, the equivalent model approach delivers models for piezoelectric elements that are driven in resonance by electrical excitation. In the case of energy harvesting the piezoelectric elements are excited mechanically and most often non-resonant. Thus, we first set up a mechanical equivalent model for base excited systems. In first approximation it represents an energy harvesting unit around one resonance frequency. The model is expandable for a wider frequency range using the superpositioning of multiple circuits. From the viewpoint of optimum energy transformation between mechanical and electrical energy it is favorable to drive piezoelectric elements at resonance or anti-resonance. Thus, an energy harvesting system should be tuned to the excitation frequency.","lang":"eng"}],"editor":[{"first_name":"Jens","last_name":"Twiefel","full_name":"Twiefel, Jens"},{"full_name":"Richter, Björn","last_name":"Richter","first_name":"Björn"},{"last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias","first_name":"Tobias"},{"first_name":"Jörg","full_name":"Wallaschek, Jörg","last_name":"Wallaschek"}],"type":"conference_editor","doi":"10.1117/12.658623","title":"Model-based design of piezoelectric energy harvesting systems","volume":6169,"date_created":"2019-04-29T09:46:37Z","date_updated":"2022-01-06T07:04:16Z","page":"616909-616909-10","intvolume":"      6169","citation":{"ama":"Twiefel J, Richter B, Hemsel T, Wallaschek J, eds. <i>Model-Based Design of Piezoelectric Energy Harvesting Systems</i>. Vol 6169.; 2006:616909-616909-616910. doi:<a href=\"https://doi.org/10.1117/12.658623\">10.1117/12.658623</a>","chicago":"Twiefel, Jens, Björn Richter, Tobias Hemsel, and Jörg Wallaschek, eds. <i>Model-Based Design of Piezoelectric Energy Harvesting Systems</i>. Vol. 6169, 2006. <a href=\"https://doi.org/10.1117/12.658623\">https://doi.org/10.1117/12.658623</a>.","ieee":"J. Twiefel, B. Richter, T. Hemsel, and J. Wallaschek, Eds., <i>Model-based design of piezoelectric energy harvesting systems</i>, vol. 6169. 2006, pp. 616909-616909–10.","short":"J. Twiefel, B. Richter, T. Hemsel, J. Wallaschek, eds., Model-Based Design of Piezoelectric Energy Harvesting Systems, 2006.","bibtex":"@book{Twiefel_Richter_Hemsel_Wallaschek_2006, title={Model-based design of piezoelectric energy harvesting systems}, volume={6169}, DOI={<a href=\"https://doi.org/10.1117/12.658623\">10.1117/12.658623</a>}, year={2006}, pages={616909-616909–10} }","mla":"Twiefel, Jens, et al., editors. <i>Model-Based Design of Piezoelectric Energy Harvesting Systems</i>. Vol. 6169, 2006, pp. 616909-616909–10, doi:<a href=\"https://doi.org/10.1117/12.658623\">10.1117/12.658623</a>.","apa":"Twiefel, J., Richter, B., Hemsel, T., &#38; Wallaschek, J. (Eds.). (2006). <i>Model-based design of piezoelectric energy harvesting systems</i> (Vol. 6169, pp. 616909-616909–616910). <a href=\"https://doi.org/10.1117/12.658623\">https://doi.org/10.1117/12.658623</a>"},"year":"2006"},{"date_updated":"2022-01-06T07:04:16Z","volume":"Band 180","author":[{"full_name":"Wilmanns, S","last_name":"Wilmanns","first_name":"S"},{"full_name":"Nakamura, K","last_name":"Nakamura","first_name":"K"},{"first_name":"Maik","full_name":"Mracek, Maik","last_name":"Mracek"},{"last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210","first_name":"Tobias"}],"date_created":"2019-04-29T09:53:46Z","title":"Non-resonant piezoelectric motors driven in audible frequency range","year":"2006","place":"Paderborn, Germany","page":"205","citation":{"apa":"Wilmanns, S., Nakamura, K., Mracek, M., &#38; Hemsel, T. (2006). Non-resonant piezoelectric motors driven in audible frequency range. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i> (Vol. Band 180, p. 205). Paderborn, Germany.","mla":"Wilmanns, S., et al. “Non-Resonant Piezoelectric Motors Driven in Audible Frequency Range.” <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, vol. Band 180, 2006, p. 205.","short":"S. Wilmanns, K. Nakamura, M. Mracek, T. Hemsel, in: Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany, 2006, p. 205.","bibtex":"@inproceedings{Wilmanns_Nakamura_Mracek_Hemsel_2006, place={Paderborn, Germany}, series={HNI Verlagsschriftenreihe}, title={Non-resonant piezoelectric motors driven in audible frequency range}, volume={Band 180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators}, author={Wilmanns, S and Nakamura, K and Mracek, Maik and Hemsel, Tobias}, year={2006}, pages={205}, collection={HNI Verlagsschriftenreihe} }","ama":"Wilmanns S, Nakamura K, Mracek M, Hemsel T. Non-resonant piezoelectric motors driven in audible frequency range. In: <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>. Vol Band 180. HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:205.","ieee":"S. Wilmanns, K. Nakamura, M. Mracek, and T. Hemsel, “Non-resonant piezoelectric motors driven in audible frequency range,” in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, 2006, vol. Band 180, p. 205.","chicago":"Wilmanns, S, K Nakamura, Maik Mracek, and Tobias Hemsel. “Non-Resonant Piezoelectric Motors Driven in Audible Frequency Range.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>, Band 180:205. HNI Verlagsschriftenreihe. Paderborn, Germany, 2006."},"_id":"9558","department":[{"_id":"151"}],"series_title":"HNI Verlagsschriftenreihe","user_id":"55222","language":[{"iso":"eng"}],"publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","type":"conference","status":"public"}]