Working Modes Analysis and Control for Switched Reluctance Motor With a Fault-Tolerance Two-Stage Voltage Regulation Converter

To improve the dynamic response ability of switched reluctance motor (SRM) and make it more suitable for the application requirements of electrified ships, this article develops working modes analysis and control for SRM with a novel fault-tolerance two-stage voltage regulation converter (TVRC). With the proposed TVRC, the bus voltage can be boosted to enhance the dynamic performance, as well as the fault tolerance and operation efficiency. First, the topology of the proposed TVRC and its working modes are presented and discussed. Especially, the boost principles of the proposed converter topology are examined during normal and faulty operation situations, which can improve the fault tolerance of motor systems. Second, based on the analysis of the working modes, the parameters design of the proposed TVRC are outlined. Subsequently, a suitable control strategy is developed to perform flexible adjustments of operation speed and bus voltage. Finally, the effectiveness of working modes analysis and control strategy is validated through simulation analysis and prototype experiments.