Theoretical Study of Rampwise DPWM Technique to Reduce Motor Acoustic Noise
Theoretical Study of Rampwise DPWM Technique to Reduce Motor Acoustic Noise
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DOI：
10.1109/tpel.2023.3260772
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发表时间：
2023-07
影响因子：
6.7
通讯作者：
H. Ayano;Takumi Nakagaki;Yuki Iguchi;Y. Matsui;Jun-ichi Itoh
中科院分区：
文献类型：
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作者：
H. Ayano;Takumi Nakagaki;Yuki Iguchi;Y. Matsui;Jun-ichi Itoh
在诸如电梯和电动车辆之类的生活环境附近产生的电机声学噪声可能导致不适。为了减少声学噪声，开关频率被设置为可听频率范围的高端。然而，在这种情况下，开关损耗增加。传统的不连续脉宽调制（DPWM）方法由于可以大幅度降低开关损耗而得到广泛应用。然而，它产生更大的声学噪声比传统的正弦脉宽调制方法。作者先前提出了“斜坡式DPWM技术”，它可以降低声学噪声和开关损耗。本文将斜波式DPWM技术的线间电压展开为实值傅立叶级数，并分析了其频率特性。从理论上证实了斜波式DPWM技术中的斜波部分可以达到降低电机噪声的目的。此外，从理论和实验上验证了斜波式DPWM技术对电机噪声的抑制效果。
Motor acoustic noise generated near living environments, such as elevators and electric vehicles, may cause discomfort. In order to reduce the acoustic noise, the switching frequency is set to the high side of the audible frequency range. In this case, however, the switching loss is increased. The conventional discontinuous pulsewidth modulation (DPWM) method is widely used since it can reduce the switching loss drastically. However, it produces larger acoustic noise than the conventional sinusoidal pulsewidth modulation method. The authors have previously proposed “Rampwise DPWM technique,” which can reduce both acoustic noise and switching loss. In this article, the line–line voltage with the proposed Rampwise DPWM technique is expanded into a real-valued Fourier series, and the frequency characteristics are analyzed. It is theoretically confirmed that the rampwise part in the Rampwise DPWM technique can achieve the reduction of motor acoustic noise. Furthermore, the reduction effect of motor acoustic noise with the Rampwise DPWM technique is theoretically and experimentally verified.