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Noise reduction using high-switching-frequency operation with SiC MOSFET for switched reluctance motors

Acoustic noise and vibration caused by the radial forces of a switched reluctance motor (SRM) are a significant issue. This drawback is the main reason behind the lack of popularity of SRMs in practical applications. This study proposes a method for reducing the acoustic noise and vibration of a three-phase SRM. The proposed current waveform is selected to ensure a constant total radial force of the stator teeth while suppressing the third harmonic component that generates the acoustic noise. The effect of the proposed method is confirmed through high-switching-frequency operation with SiC MOSFETs.