To control the high-frequency acoustic noise of the permanent magnet synchronous machine (PMSM) with the space vector pulse-width modulation (SVPWM), an investigation into the mechanism of the sideband vibro-acoustics is presented in this study. Especially, the relationship is developed between the sideband electromagnetic components and the mechanical vibro-acoustics, which paves the fundamentals to reduce the noise at the sources. Firstly, the analytical derivations of the sideband voltage and current harmonics are expressed, while the magnetic components of permanent magnet and armature reaction are also discussed in different carrier frequency domains. Secondly, the corresponding radial electromagnetic force analysis is established to acquire the pattern of the vibro-acoustic. Finally, the proposed multi-physics models are reconstructed by coupling spatial and temporal features, where the amplitudes are also calculated. A 12-slot10-pole prototype PMSM is considered as a case study to testify the accuracy of the proposed method, where the corresponding electromagnetic components are calculated and measured under different conditions, together with the vibration and acoustics. This investigation may provide a new route for the acoustics prediction and the precise optimisation of PMSM.

中文翻译：

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利用SVPWM分析PMSM中的边带电流谐波和振动声

为了利用空间矢量脉宽调制（SVPWM）控制永磁同步电机（PMSM）的高频声噪声，本文对边带振动声的机理进行了研究。特别是，边带电磁元件与机械振动声之间发展了关系，这为降低源噪声提供了基础。首先，表达了边带电压和电流谐波的解析推导，同时还讨论了在不同载频域中永磁体的磁性成分和电枢反应。其次，建立相应的径向电磁力分析以获取振动声的模式。最后，提出的多物理场模型是通过耦合时空特征而重建的，其中还计算了振幅。一个12槽10极原型PMSM被认为是一个案例研究，以证明所提出方法的准确性，该方法在不同条件下计算和测量相应的电磁分量以及振动和声学。该研究可为声学预测和PMSM的精确优化提供一条新途径。