Enhanced three-phase inverter topology and PWM strategy for electric vehicle powertrains with reduced common-mode voltage
In electric drive systems, common-mode voltage (CMV) fluctuations cause bearing currents that damage the motor, deteriorate stator winding insulation, and generate electromagnetic interference throughout the system. Several methods have been proposed to mitigate this stray voltage, especially in ele...
| Autores: | , , , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2026 |
| País: | España |
| Recursos: | Universidad del País Vasco |
| Repositório: | Addi. Archivo Digital para la Docencia y la Investigación |
| OAI Identifier: | oai:dnet:addi________::927bb338ec536973174a15e9c13a2e4a |
| Acesso em linha: | http://hdl.handle.net/10810/78728 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Common-mode voltage (CMV) Electric vehicle Power converter topologies Modulation techniques Reliability |
| Resumo: | In electric drive systems, common-mode voltage (CMV) fluctuations cause bearing currents that damage the motor, deteriorate stator winding insulation, and generate electromagnetic interference throughout the system. Several methods have been proposed to mitigate this stray voltage, especially in electric vehicles, where reliability requirements are increasingly stringent. At the same time, improving efficiency — by minimizing power losses — is essential to enhance driving range and thermal management. This paper presents a novel two-level three-phase inverter topology combined with hybrid modulation techniques for electric vehicle propulsion systems. The proposed architecture aims to significantly reduce CMV variations while maintaining high overall efficiency. Simulation and experimental results confirm that, depending on the specific operating condition, the proposed solution achieves reductions of more than 80 % in CMV fluctuations compared with standard SV-PWM operation, efficiency improvements between 0.6 % and 1.5 % relative to a conventional VSI, and a redistribution of switching losses that can reduce the power dissipated per main VSI device by more than 25 %. Unlike previously proposed alternatives, the converter preserves full compatibility with standard VSI control schemes and achieves a superior balance between reliability, CMV mitigation, and efficiency. Therefore, it represents a feasible and promising alternative for future electric vehicle drive systems. |
|---|