A Switched Reluctance Motor Power Converter With Dual-Source Inputs and Multimodal Control Strategy

This paper addresses key technical challenges in switched reluctance motor (SRM) drives, notably significant torque ripple and the inherent trade-off between efficiency and torque performance under varying operating conditions. A novel power converter with dual-source input (PC-DSI) characteristics is proposed, accompanied by a multi-mode control strategy (MCS) for enhanced operational flexibility. At the topological level, the proposed converter seamlessly transitions among four operating modes: low-voltage drive, high-voltage drive, high-voltage demagnetization with low-voltage drive, and a hybrid high/low-voltage drive. The coordinated control of multi-level voltage outputs substantially improves dynamic regulation capability. In terms of control strategy, a multi-level multi-mode cooperative control method based on torque sharing is introduced. This approach establishes a multi-objective optimization model that balances efficiency and torque ripple minimization. By incorporating dynamic weighting coefficients α and β, the system achieves online adaptive switching between efficiency-prioritized and ripple-prioritized control objectives. Experimental results demonstrate that the proposed scheme reduces torque ripple by up to 89% under rated operating conditions while improving system efficiency by 10% across a wide speed range.