{"publication_status":"published","language":[{"iso":"eng"}],"publication":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","date_updated":"2022-02-21T19:25:17Z","type":"conference","doi":"10.1109/apec42165.2021.9487462","abstract":[{"text":"DC-DC converters for on-board chargers (OBC) of electrical vehicles are usually galvanically isolated allowing modular single-phase PFC front-end solutions, but require transformers which are more bulky, costly and lossy than inductors of non-isolated DC-DCs. Furthermore, for vehicle-to-grid applications, bidirectional converters with transformers are generally more complex and have a higher count on semiconductor switches than transformerless solutions. However, when using non-isolated DC-DC converters within an OBC, the large common-mode (CM) capacitance comprising capacitive parasitics of the traction battery as well as explicit Y-capacitors connecting the high-voltage DC-system (HV-system) within specific HV-loads to ground has to be considered. For the PFC front-end stage, when supplied from the three-phase mains this means that generation of high-frequency and high-amplitude CM voltages, as it is common e.g. with the conventional six-switch full-bridge converter, has to be strictly avoided. For this reason, a modified topology is suggested leading to a different mode of operation and to a very low common-mode noise behaviour: The three-phase four-wire full-bridge PFC with split DC-link, whose midpoint is connected to the mains neutral provides very stable potentials at the DC-link rails and therefore it can be classified as Zero-CM-topology.For dedicated single-phase operation, as required for most OBC, an additional balancing leg may be added to the topology to reduce the required DC-link capacitance and allow non-electrolytic capacitors.The function of the bidirectional Zero-CM three-phase four-wire full-bridge PFC was verified by simulation and on an 11 kW-laboratory sample. The power factor is above 0.999 and an efficiency of 98 % is measured.","lang":"eng"}],"author":[{"full_name":"Strothmann, Benjamin","id":"22556","last_name":"Strothmann","first_name":"Benjamin"},{"first_name":"Frank","id":"71291","last_name":"Schafmeister","full_name":"Schafmeister, Frank"},{"full_name":"Böcker, Joachim","id":"66","last_name":"Böcker","orcid":"0000-0002-8480-7295","first_name":"Joachim"}],"publisher":"IEEE","status":"public","year":"2021","citation":{"apa":"Strothmann, B., Schafmeister, F., &#38; Böcker, J. (2021). Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger. <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. <a href=\"https://doi.org/10.1109/apec42165.2021.9487462\">https://doi.org/10.1109/apec42165.2021.9487462</a>","ieee":"B. Strothmann, F. Schafmeister, and J. Böcker, “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger,” 2021, doi: <a href=\"https://doi.org/10.1109/apec42165.2021.9487462\">10.1109/apec42165.2021.9487462</a>.","mla":"Strothmann, Benjamin, et al. “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger.” <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>, IEEE, 2021, doi:<a href=\"https://doi.org/10.1109/apec42165.2021.9487462\">10.1109/apec42165.2021.9487462</a>.","ama":"Strothmann B, Schafmeister F, Böcker J. Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger. In: <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE; 2021. doi:<a href=\"https://doi.org/10.1109/apec42165.2021.9487462\">10.1109/apec42165.2021.9487462</a>","chicago":"Strothmann, Benjamin, Frank Schafmeister, and Joachim Böcker. “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger.” In <i>2021 IEEE Applied Power Electronics Conference and Exposition (APEC)</i>. IEEE, 2021. <a href=\"https://doi.org/10.1109/apec42165.2021.9487462\">https://doi.org/10.1109/apec42165.2021.9487462</a>.","short":"B. Strothmann, F. Schafmeister, J. Böcker, in: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), IEEE, 2021.","bibtex":"@inproceedings{Strothmann_Schafmeister_Böcker_2021, title={Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger}, DOI={<a href=\"https://doi.org/10.1109/apec42165.2021.9487462\">10.1109/apec42165.2021.9487462</a>}, booktitle={2021 IEEE Applied Power Electronics Conference and Exposition (APEC)}, publisher={IEEE}, author={Strothmann, Benjamin and Schafmeister, Frank and Böcker, Joachim}, year={2021} }"},"user_id":"66","date_created":"2022-02-15T09:14:56Z","department":[{"_id":"52"}],"_id":"29849","title":"Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger","keyword":["Three-phase four-wire","OBC","Y2G","PFC","CM","EY charger","balancing circuit"]}