Research Article
[Retracted] Fault Diagnosis Method of Rotor Magnetic Field Local Demagnetization in Permanent Magnet Synchronous Motor Model Predictive Current Control System
Figure 11
The 5/4 order fault characteristic harmonic current extracted from stator current based on adaptive signal extraction algorithm and its three-dimensional time-frequency spectrum based on Hilbert transform. (a) The 5/4 order fault characteristic harmonic current extracted from stator current. (b) Three-dimensional time-frequency spectrum.
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