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This paper proposes a novel method for magnetic polarity detection in pulsating current injection based self-sensing control of surface-mounted permanent-magnet synchronous motors (SPMSM). When a proper high frequency current is superimposed in d-axis, the flux linkage saturates which can lead to the distortion of the resulting voltage. With the Fourier analysis, the 2nd harmonic of the resulting...
High frequency (HF) sinusoidal voltage injection is a common method to estimate the initial rotor position of permanent magnet synchronous machines (PMSM). When a HF sinusoidal voltage is injected into d-axis, the saturation of magnetic field in d-axis can lead to HF current response including harmonics. This paper makes a detailed analysis on the harmonic current response. Based on the analysis,...
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