A Novel Multilevel T-Type Reconfigurable Power Converter for Switched Reluctance Motors in New-Energy Vehicles

To meet the stringent dual-carbon targets, new-energy vehicles are in urgent need of traction systems that combine high efficiency, high reliability, and low cost. Switched reluctance motors have emerged as a promising option, with no rare-earth materials required, a simple mechanical structure, and inherent fault tolerance. However, their emerging dual-stator configuration poses challenges such as multi-winding coordination and complex operating modes — issues that conventional asymmetric half-bridge converters cannot address effectively. This leads to excessive torque ripple, inadequate fault survivability, and limited flexibility in energy managementThis paper proposes an asymmetric three-level T-type converter that integrates photovoltaic assistance, three-level voltage synthesis, and real-time reconfigurable fault-tolerant capabilities. By adding only two metal-oxide-semiconductor field-effect transistors and two diodes, the proposed topology achieves nine operational modes, which support flexible magnetization, freewheeling, demagnetization, regenerative braking, and active neutral-point balancing. Thus, the proposed converter provides a compact and cost-effective power-stage solution for next-generation new-energy vehicle traction systems.

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