[Retracted] Fault Diagnosis Method of Rotor Magnetic Field Local Demagnetization in Permanent Magnet Synchronous Motor Model Predictive Current Control System

Figure 2

The fundamental wave and harmonic wave of no-load radial air gap flux density for 50% demagnetization of a single permanent magnet and healthy permanent magnet. (a)The fundamental wave and harmonic wave of no-load radial air gap flux density for 50% demagnetization of a single permanent magnet. (b)The fundamental wave and harmonic wave of no-load radial air gap flux density for healthy permanent magnet.

(a)

(b)