Irreversible Demagnetization Fault Diagnosis of Permanent Magnet Synchronous Motor for Electric Vehicle

Sliding observer‐based demagnetisation fault‐tolerant control in permanent magnet synchronous motors

“…Using the changes in torque spectrum and the track diagram of a torque ripple, Hong et al [9] detected PM demagnetisation by analysing the characteristic quantity of the output torque for a motor under fault. Yoo et al [10] proposed a demagnetisation diagnosis method based on locked rotor test results to detect PM demagnetisation through the locked‐rotor torque and current of the motor. Accordingly, He et al [11] proposed a robust demagnetisation fault detection method in PMSM based on sliding observer.…”