Reduction of Motor Acoustic Noise with Rampwise DPWM
Reduction of Motor Acoustic Noise with Rampwise DPWM
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DOI：
10.23919/icems50442.2020.9291229
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
H. Ayano;M. Kitada;Yuki Iguchi;Y. Matsui;J. Itoh
中科院分区：
文献类型：
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作者：
H. Ayano;M. Kitada;Yuki Iguchi;Y. Matsui;J. Itoh
不连续脉宽调制方法因其能显著降低开关损耗而被广泛应用。然而，采用不连续PWM方法的电机和电抗器产生的声学噪声比传统的正弦PWM方法增加得更多。在必须考虑噪声的应用中，载波频率设置在可听范围的上限附近。然而，当使用不连续的PWM方法时，噪声可能是一个问题。作者先前提出了一种既能降低噪声，又能降低开关损耗的“拉姆式DPWM”。结果表明，即使在改变逆变器输出电压幅值或开关暂停时间比的情况下，所提出的方法也是有效的。
The discontinuous PWM method is widely used because the switching loss can be drastically reduced. However, acoustic noise generated from a motor and a reactor with the discontinuous PWM method increases more than with the conventional sinusoidal PWM method. In applications where noise must be considered, the carrier frequency is set near the upper limit of the audible range. However, the acoustic noise may be a problem when the discontinuous PWM method is used. The authors have previously proposed "Rampwise DPWM" which can reduce both acoustic noise and switching loss. This paper shows that the proposed technique is effective even under the condition that the output voltage amplitude of the inverter or the ratio of the switching pause period is changed.