A Sensorless Control Method for IPMSM with an Open-Loop Predictor for Online Parameter Identification

In this paper, a method is proposed to improve the performance of a mechanical transducer-less control of an interior permanent magnet synchronous machine (IPMSM) with use of a dedicated online parameter estimator (OPE). The active flux observer is employed for position estimation, along with the proposed OPE which displays high sensitivity to parameter-discrepancies, that its parameter adaptation algorithm (PAA) takes advantage of. The temperature-sensitive parameters are adapted in different speed ranges by scheduling the adaptation-gains for optimal performance. The simulation results show that the proposed method improves the torque and speed control of the drive across the torque-speed plane particularly in the presence of varying parameters. © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.