Comparative Analysis and Optimization of Novel Pulse Injection Sensorless Drive Methods for Fault-Tolerant DC Vernier Reluctance Machine

Multiphase dc-excited Vernier reluctance machine (DC-VRM) exhibits the merits of robust structure, small torque ripple, and good fault-tolerant ability. Developing advanced sensorless drive methods can further promote its application in safety-critical system. In this article, pulse injection are optimized a six-phase DC-VRM parallel H-bridge system to strengthen their acceleration performance The studied article corresponds speed during startup stage. By full-phase alternative method (APIM), each phase be excited independently avoid mutual-inductance influence on position estimation, but suffers from long communication delay relatively poor performance. A reduced-phase APIM reduce detection time, lack detected may estimation accuracy To solve these problems, novel vertical-axis synchronous is proposed compared with previous article. key inject pulses into phases simultaneously, thus reducing time improving generation. It proved that mutual inductance ignored, improved without deterioration