Predictive-Pulse-Injection-Based Dual-Inverter Complementary Sensorless Drive for 12/10 DC Vernier Reluctance Machine

A dc-excited Vernier reluctance machine (DC-VRM) using a 12-slot/10-pole-pair design exhibits the advantages of small torque ripple and robust structure, which has good potential to be applied as an aerospace integrated starter/generator. By eliminating vulnerable position sensors, system reliability can further improved by sensorless startup. However, driven traditional three-phase inverter, phase inductance 12/10 DC-VRM becomes constant due its complementary characteristic, means saliency effect in is obliterated, thereby operation self-inductance detection cannot applied. To release improve drive performance, dual-inverter structure introduced reconstruct separated dual inverters. The released series model with mutual coupling established through piecewise function, accurate estimation method without finite-element analysis or complex measurements introduced. Moreover, analyzing linearity inductance, full-cycle high-linearity range composed features, thus accuracy guaranteed. Through this feature, predictive-position-based pulse injection proposed acceleration performance time reduction. Based on predictive position, pulses are only injected into one inverter whose corresponding phases located at range, decreasing improving performance.