Harmonic Spectra Shaping for Switched Reluctance Motor with Asymmetric-Carrier Random PWM

[摘要] To alleviate the undesirable vibration and acoustic noise of switched reluctance motor (SRM), an asymmetric-carrier random PWM (ACRPWM) method is designed to shape the harmonic spectra for the speed control of the SRM. The ACRPWM can not only effectively spread the harmonic spectra of the voltage to a more wide frequency range, but also maintain the fixed switching frequency in the control of the converter. The shaping of the harmonic spectra can reduce the harmonic components beside the switching frequency and its integer multiples. The harmonic spread factor and total harmonic distortion are used to evaluate the performance of the ACRPWM. The ACRPWM is tested on hard and soft switching modes of the converter in the speed control of the SRM, respectively. Simulation results certify the effectiveness of the proposed ACRPWM in the shaping of the harmonic spectra for the SRM.

[学科分类] 自动化工程

[关键词] Switched reluctance motor ;Asymmetric-carrier random PWM ;Harmonic spectrum shaping ;Harmonic spread factor ;Total harmonic distortion