Leakage Current Issue of Non-Isolated Integrated Chargers for Electric Vehicles
Abstract
Electric vehicle (EV) chargers are traditionally isolated from the grid. Non-isolated chargers have great potential as they enable higher power density at lower cost. Integrated chargers have the potential to utilize existing onboard, high power-rated electronic components for Level 3 charging. Four possible non-isolated integrated charger topologies based on permanent magnet synchronous machine (PMSM) are introduced at the beginning of this paper. Then, the issue of common mode (CM) leakage current through the on-board filters is identified and analyzed. It is found that the leakage current could rise to dangerous levels and cause potential electric shocks to users. The negative influence and safety risks from the leakage current for different grounding systems are also discussed. Experimental results are presented to validate the leakage current analysis. Finally, possible mitigation techniques of the leakage current are discussed.
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Cites
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A Review of Bidirectional On-Board Chargers for Electric Vehicles
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“Galvanic isolation is primarily required to prevent common mode currents from creating a shock hazard for the user [155].”
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“In either case, the battery and AC grid are usually isolated to avoid the common mode leakage current [37].”
Background
- Authors
- Zhang, Y., Yang, G., He, X., Elshaer, M., Perdikakis, W., Li, H., Yao, C., Wang, J., Zou, K., Xu, Z., & Chen, C.
- Affiliations
- The Ohio State University (US)
- Ford Motor Company (United States) (US)
- Venue
- 2018 IEEE Energy Conversion Congress and Exposition (ECCE)
- Publisher
- IEEE
- Published
- 2018-09
- Pages
- 1221-1227
- OpenAlex
- W2903991386
- Cited by
- 41
- References
- 11
- Citations by year
- 2026: 2 · 2025: 9 · 2024: 10 · 2023: 6 · 2022: 7 · 2021: 4 · 2020: 2 · 2019: 1
- FWCI
- 2.79
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- IEEE Energy Conversion Congress and Exposition (ECCE) (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced DC-DC Converters
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electromagnetic Compatibility and Noise Suppression
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Wireless Power Transfer Systems
- Keywords
- electric vehicle charging stations, leakage current, common-mode current, permanent magnet synchronous motor, grounding systems
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