---
_id: '29849'
abstract:
- lang: eng
  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.'
author:
- first_name: Benjamin
  full_name: Strothmann, Benjamin
  id: '22556'
  last_name: Strothmann
- first_name: Frank
  full_name: Schafmeister, Frank
  id: '71291'
  last_name: Schafmeister
- first_name: Joachim
  full_name: Böcker, Joachim
  id: '66'
  last_name: Böcker
  orcid: 0000-0002-8480-7295
citation:
  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>'
  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>
  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} }'
  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>.
  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>.
  short: 'B. Strothmann, F. Schafmeister, J. Böcker, in: 2021 IEEE Applied Power Electronics
    Conference and Exposition (APEC), IEEE, 2021.'
date_created: 2022-02-15T09:14:56Z
date_updated: 2022-02-21T19:25:17Z
department:
- _id: '52'
doi: 10.1109/apec42165.2021.9487462
keyword:
- Three-phase four-wire
- OBC
- Y2G
- PFC
- CM
- EY charger
- balancing circuit
language:
- iso: eng
publication: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC)
publication_status: published
publisher: IEEE
status: public
title: Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV
  Charger
type: conference
user_id: '66'
year: '2021'
...