H. Wertz and F. Schutte, “Self-tuning speed control for servo drives with imperfect mechanical load,”10.1109/ias.2000.882081__2000, doi:10.1109/ias.2000.882081 .

P. Ide, N. Froehleke, H. Grotstollen, W. Korb, and B. Margaritis, “Analysis of three-phase/three-level rectifiers at low load and discontinuous conduction mode,”10.1109/apec.2000.826105__2000, doi:10.1109/apec.2000.826105 .

S. Beinecke, Online-Schätzung von mechanischen Parametern, Kennlinien und Zustandsgrößen geregelter elektrischer Antriebe . 2000.

P. Ide, N. Froehleke, H. Grotstollen, W. Korb, and B. Margaritis, “Operation of a three-phase/three-level-rectifier in wide range and single-phase applications,”10.1109/iecon.1999.816448__1999, doi:10.1109/iecon.1999.816448 .

S. Beineke and H. Wertz, “Design of extended Kalman filters for high performance position control of electrical drives,”10.1109/aim.1999.803168__1999, doi:10.1109/aim.1999.803168 .

J. Maas and T. Schulte, “High performance speed control for ultrasonic motors,”10.1109/aim.1999.803148__1999, doi:10.1109/aim.1999.803148 .

H. Wertz et al., “Computer aided commissioning of speed and position control for electrical drives with identification of mechanical load,”10.1109/ias.1999.799174__1999, doi:10.1109/ias.1999.799174 .

N. Fröhleke, R. Pieper, H. Mundinger, and H. Grotstollen, “Computer aided investigation of the auxiliary resonant commutated pole converter for wide range applications such as welding power supplies,”10.1109/iecon.1999.816530__1999, doi:10.1109/iecon.1999.816530 .

A. Bünte, Selbsteinstellender Antrieb mit drehmomentoptimal betriebenem Asynchronmotor. 1999.

T. Schulte and N. Fröhleke, “Parameter identification of ultrasonic motors,”10.1109/aim.1999.803149__1999, doi:10.1109/aim.1999.803149 .

F. Schutte, S. Beineke, and H. Grotstollen, “Knowledge based controller selection for electrical drives with imperfect mechanic,”10.1109/iecon.1998.722864__1998, doi:10.1109/iecon.1998.722864 .

J. Maas, Modellierungund Regelung stromrichtergespeister Ultraschall-Wanderwellenmotoren. 1998.

S. Beinke, H. Wertz, F. Schutte, H. Grotstollen, and N. Fröhleke, “Identification of nonlinear two-mass systems for self-commissioning speed control of electrical drives,”10.1109/iecon.1998.724071__1998, doi:10.1109/iecon.1998.724071 .

P. Wallmeier, J. Richter, N. Fröhleke, H. Grotstollen, L. Langemeyer, and B. Margaritis, “A high efficiency single-phase power factor corrected switched mode rectifier,”10.1109/iecon.1998.724175__1998, doi:10.1109/iecon.1998.724175 .

P. Wallmeier, N. Fröhleke, and H. Grotstollen, “Improved analytical modeling of conductive losses in gapped high-frequency inductors,”10.1109/ias.1998.730254__1998, doi:10.1109/ias.1998.730254 .

P. Wallmeier, N. Fröhleke, and H. Grotstollen, “Automated optimization of high frequency inductors,”10.1109/iecon.1998.724147__1998, doi:10.1109/iecon.1998.724147 .

P. Ide, N. Froehleke, and H. Grotstollen, “Investigation of low cost control schemes for a selected 3-level switched mode rectifier,”10.1109/intlec.1997.645920__1997, doi:10.1109/intlec.1997.645920 .

P. Ide, N. Froehleke, and H. Grotstollen, “Comparison of selected 3-phase switched mode rectifiers,”10.1109/intlec.1997.646061__1997, doi:10.1109/intlec.1997.646061 .

J. Sun and H. Grotstollen, “Fast time-domain simulation by waveform relaxation methods,”10.1109/pesc.1996.548800__1997, doi:10.1109/pesc.1996.548800 .

S. Beineke, F. Schutte, and H. Grotstollen, “Online identification of nonlinear mechanics using extended Kalman filters with basis function networks,”10.1109/iecon.1997.671069__1997, doi:10.1109/iecon.1997.671069 .

S. Beineke, F. Schutte, H. Wertz, and H. Grotstollen, “Comparison of parameter identification schemes for self-commissioning drive control of nonlinear two-mass systems,”10.1109/ias.1997.643068__1997, doi:10.1109/ias.1997.643068 .

J. Maas and H. Grotstollen, “Averaged model of inverter-fed ultrasonic motors,”10.1109/pesc.1997.616802__1997, doi:10.1109/pesc.1997.616802 .

F. Schutte, S. Beineke, A. Rolfsmeier, and H. Grotstollen, “Online identification of mechanical parameters using extended Kalman filters,”10.1109/ias.1997.643069__1997, doi:10.1109/ias.1997.643069 .

J. Maas, T. Schulte, and H. Grotstollen, “Optimized drive control for inverter-fed ultrasonic motors,”10.1109/ias.1997.643144__1997, doi:10.1109/ias.1997.643144 .

P. Wallmeier and H. Grotstollen, “Magnetic shielding applied to high-frequency inductors,”10.1109/ias.1997.629003__1997, doi:10.1109/ias.1997.629003 .

A. Fiedler and H. Grotstollen, “Simulation of power electronic circuits with principles used in wave digital filters,”10.1109/ias.1995.530613__1997, doi:10.1109/ias.1995.530613 .

S. Scheffler and J. Böcker, “Application of Neural Networks for Control of Four-Quadrant Converters in Railway Propulsion Systems Applications of Neural Adaptive Control Technology,” in Applications of Neural Adaptive Control Technology, Berlin, Germany, 1997, vol. 17, pp. 281–302.

M. Ruff, Ein automatisiertes Verfahren zur Off-line-Identifikation der elektrischen Parameter von pulswechselrichtergespeisten Asynchronmotoren. 1997.

A. Fiedler, Beiträge zur Entwicklung von Gleichstromumrichtern mit geringer Ausgangsspannung. 1997.

N. Fröhleke, H. Mundinger, S. Beineke, P. Wallmeier, and H. Grotstollen, “Resonant transition switching welding power supply,”10.1109/iecon.1997.671804__1997, doi:10.1109/iecon.1997.671804 .

P. Wallmeier, N. Fröhleke, J. Richter, P. Ide, and H. Grotstollen, “A critical comparison of boost-topologies for single-phase switched mode rectifiers,”10.1109/intlec.1997.646060__1997, doi:10.1109/intlec.1997.646060 .

J. Sun and H. Grotstollen, “Symbolic analysis of switching power converters based on a general averaging method,”10.1109/pesc.1996.548633__1996, doi:10.1109/pesc.1996.548633 .

J. Sun and H. Grotstollen, “A symbolic computation package for averaged analysis of power electronic systems,”10.1109/apec.1996.500428__1996, doi:10.1109/apec.1996.500428 .

M. Ruff and H. Grotstollen, “Off-line identification of the electrical parameters of an industrial servo drive system,”10.1109/ias.1996.557017__1996, doi:10.1109/ias.1996.557017 .

A. Bunte, H. Grotstollen, and P. Krafka, “Field weakening of induction motors in a very wide region with regard to parameter uncertainties,”10.1109/pesc.1996.548695__1996, doi:10.1109/pesc.1996.548695 .

J. Maas and H. Grotstollen, “Cascaded control scheme for speed variable ultrasonic drives,”10.1109/ias.1996.557064__1996, doi:10.1109/ias.1996.557064 .

J. Sun and H. Grotstollen, “Fast time-domain simulation by waveform relaxation methods,”10.1109/pesc.1996.548800__1996, doi:10.1109/pesc.1996.548800 .

J. Maas and H. Grotstollen, “Dynamic analysis of inverter-fed ultrasonic motors,”10.1109/pesc.1996.548822__1996, doi:10.1109/pesc.1996.548822 .

J. Sun, S. Beineke, and H. Grotstollen, “Optimal PWM based on real-time solution of harmonic elimination equations Publisher: IEEE PDF,” 1996.

J. Sun and H. Grotstollen, “Optimized Space Vector Modulation and Regular-Sampled PWM: A Reexamination,” 1996.

N. Fröhleke, P. Wallmeier, and H. Grotstollen, “Investigation of Active-Clamped Topologies for Low Output Voltage dc/dc-Modules,” 1996.

J. Maas and H. Grotstollen, “Characteristics of Inverter-Fed Ultrasonic Motors - Optimization of Stator/Rotor-Interface,” 1996.

N. Fröhleke, J. Richter, P. Wallmeier, and H. Grotstollen, “Soft switching forward-flyback converter with one magnetic component and current doubler rectification circuit,”10.1109/ias.1996.560225__1996, doi:10.1109/ias.1996.560225 .

J. Sun, N. Fröhleke, and H. Grotstollen, “Harmonic reduction techniques for single-switch three-phase boost rectifiers,”10.1109/ias.1996.560234__1996, doi:10.1109/ias.1996.560234 .

H. Grotstollen and A. Bünte, “Control of induction motor with orientation on rotor flux or on stator flux in a very wide field weakening region-experimental results,”10.1109/isie.1996.551065__1996, doi:10.1109/isie.1996.551065 .

H. Grotstollen and J. Wiesing, “Torque capability and control of a saturated induction motor over a wide range of flux weakening,”10.1109/41.402476__IEEE Transactions on Industrial Electronics, vol. 42, no. 4, pp. 374–381, 1995, doi:10.1109/41.402476 .

B. Becker, H. Grotstollen, and L. Heinemann, “Computer aided design and modeling of high frequency magnetic components,”10.1109/apec.1995.468970__1995, doi:10.1109/apec.1995.468970 .

A. Fiedler and H. Grotstollen, “Simulation of power electronic circuits with principles used in wave digital filters,”10.1109/ias.1995.530613__1995, doi:10.1109/ias.1995.530613 .

A. Fiedler and H. Grotstollen, “Investigation of asymmetrical phase-shifted full bridge [power convertors],”10.1109/iecon.1995.483448__1995, doi:10.1109/iecon.1995.483448 .

J. Maas, P. Ide, N. Fröhleke, and H. Grotstollen, “Simulation model for ultrasonic motors powered by resonant converters,”10.1109/ias.1995.530291__1995, doi:10.1109/ias.1995.530291 .