Enhancement of Sensorless Control for Non-Sinusoidal Multiphase Drives-Part I: Operation in Medium and High-Speed Range

This two-part study proposes a new sensorless control strategy for non-sinusoidal multiphase permanent magnet synchronous machines (PMSMs), especially integrated motor drives (IMDs). Based on the Sliding Mode Observer (SMO), proposed uses signals (currents and voltages) of all fictitious PMSMs. It can estimate high-accuracy rotor positions that are required in vector control. is compared to conventional applies only current voltage main machine, including fundamental component back electromotive force (back EMF) Therefore, order choose an appropriate PMSMs, these two strategies will be highlighted terms precision with respect position speed estimation. Simulations experimental results obtained seven-phase PMSM shown verify compare strategies. In this part (part I), medium high-speed range considered. Sensorless at zero low-speed treated second II).