Abstract—

This article presents an experimental and theoretical investigation of acoustic noise and vibration (ANV) produced by permanent magnet synchronous motor (PMSM)-based electric drive. The principal sources of ANV in PMSM are the natural frequency of oscillations for a structure, magnetostrictive push–pull forces, aero-dynamical and aero-mechanical forces, and the interaction of time and space harmonics in airgap flux density and armature flux density. Initially, a structural mathematical model of PMSM has been developed to determine the structural natural frequency component in the ANV pattern emitted from the PMSM. Later an analytical electrical model has been designed to assess the torque performance of the machine. Interaction of the torque ripple with the natural frequency oscillation has been demonstrated to establish the net acoustic pressure levels. Power electronic converter injects the time harmonics into the PMSM drives, which can be addressed by employing suitable control algorithms. To investigate the ANV of PMSM drive, a mathematical model of PMSM is developed and analyzed. The physical phenomenon responsible for ANV induced by Maxwell forces in the machine has been discussed extensively. Time-domain and frequency domain analysis is used to show the effects of changing the operating parameters of the power electronic converters on the ANV. The main focus of this work is to build a better understanding and to draw an operational concept of ANV produced by PMSM drive from deduced theoretical and experimental investigations. The experimental investigations are performed on a low-cost laboratory setup of PMSM drive and acoustic chamber to validate the theoretical deductions. Furthermore, a numerical techniques-based design approach for a reduction in ANV for PMSM drive is presented in this article. This approach reduces the space harmonics in the airgap flux density wave by altering the number of slots in PMSM. Hence, the effective torque pulsation reduction has also been reported.

摘要-

本文介绍了基于永磁同步电机 (PMSM) 的电驱动器产生的噪声和振动 (ANV) 的实验和理论研究。PMSM 中 ANV 的主要来源是结构的固有振荡频率、磁致伸缩推拉力、空气动力和空气机械力，以及气隙磁通密度和电枢磁通密度中时间和空间谐波的相互作用。最初，已经开发了 PMSM 的结构数学模型，以确定从 PMSM 发出的 ANV 模式中的结构固有频率分量。后来设计了一个分析电气模型来评估机器的扭矩性能。转矩脉动与固有频率振荡的相互作用已被证明可以建立净声压级。电力电子转换器将时间谐波注入 PMSM 驱动器，这可以通过采用合适的控制算法来解决。为了研究 PMSM 驱动的 ANV，开发并分析了 PMSM 的数学模型。由麦克斯韦力在机器中引起的 ANV 的物理现象已被广泛讨论。时域和频域分析用于显示改变电力电子转换器工作参数对 ANV 的影响。这项工作的主要重点是建立更好的理解，并从推导出的理论和实验研究中得出由 PMSM 驱动产生的 ANV 的操作概念。实验研究是在 PMSM 驱动器和声室的低成本实验室设置上进行的，以验证理论推论。此外，本文还介绍了一种基于数值技术的设计方法，用于降低 PMSM 驱动器的 ANV。这种方法通过改变 PMSM 中的槽数来减少气隙磁通密度波中的空间谐波。因此，还报告了有效的扭矩脉动减少。