Acoustic Noise Reduction in Single Phase SRM Drives by Random Switching Technique

It is known that if harmonic spectra are decreased, then acoustic noise also decreased. Hence, this paper deals with a new random switching strategy using DSP TMS320F2812 to decrease the harmonics spectra of single phase switched reluctance motor. The proposed method which combines random turn-on, turn-off angle technique and random pulse width modulation technique is shown. A harmonic spread factor (HSF) is used to evaluate the random modulation scheme. In order to confirm the effectiveness of the new method, the experimental results show that the harmonic intensity of output voltage for the proposed method is better than that for conventional methods.

Authors:

• Minh-Khai Nguyen
• Young-Gook Jung
• Young-Cheol Lim

Keywords:

• Single phase switched reluctance motor (SRM)
• harmonic spread factor (HSF)
• random switching technique.

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