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首页> 外文期刊>Power Electronics, IET >Synchronous random switching frequency modulation technique based on the carrier phase shift to reduce the PWM noise
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Synchronous random switching frequency modulation technique based on the carrier phase shift to reduce the PWM noise

机译:基于载波相移的同步随机切换频率调制技术,减少PWM噪声

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摘要

Pulse width modulation (PWM) technique brings harsh acoustic noise in motor drive system. Thus, synchronous random switching frequency modulation (SRSFM) technique based on carrier phase shift for paralleled three-phase voltage source inverters is proposed in this study to eliminate the PWM noise. The proposed SRSFM technique is able to remove the high-frequency PWM noise more effectively than the conventional random switching frequency PWM; it not only completely eliminates the PWM noise nearby odd-order carrier frequency but also reduces PWM vibration noise around even-order carrier frequency depending on the switching frequency variation range. Furthermore, the SRSFM technique is simple to implement and requires no additional hardware. Finally, the effectiveness of the proposed method is verified by detailed experimental results.
机译:脉冲宽度调制(PWM)技术在电机驱动系统中带来严格的声学噪声。因此,在该研究中提出了基于对并联三相电压源逆变器的载波相移的同步随机切换频率调制(SRSFM)技术,以消除PWM噪声。所提出的SRSFM技术能够比传统的随机开关频率PWM更有效地去除高频PWM噪声;它不仅完全消除了附近的奇阶载波频率的PWM噪声,而且根据开关频率变化范围,还降低了偶然级载波频率的PWM振动噪声。此外,SRSFM技术易于实现,无需额外的硬件。最后,通过详细的实验结果验证了所提出的方法的有效性。

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