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Optimum Current Waveform for Minimizing Torque Ripple of SPM Motors

机译：最佳电流波形，可最大程度降低SPM电机的转矩纹波

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This article deals with the shaping of the current waveform for minimizing the torque ripple in a surface mounted PM motor. This technique is not completely new, as it has been presented in specific applications. Conversely, this article proposes a generalized approach to determine the well-suited current waveform that minimizes the torque ripple. The computed current waveforms are considered the ideal waveforms for eliminating the torque ripple. Considerations are then given about practical implementation. The procedure for computing the current waveforms is presented for both sinewave or squarewave current control. Some constraints are imposed to the currents so that they assume actual waveform. Then, various current shapes are determined on the basis of the back emf waveforms, considering both full and partial-conduction period. To verify the analytical results, the computed current waveforms have been implemented in a DSP and imposed to a surface mounted PM motor by a hysteresis current controller. Experimental results of the different current waveforms are presented and discussed, emphasizing their effectiveness in reducing the torque oscillation.
机译：本文讨论了电流波形的整形，以最大程度地减小了表面安装式PM电动机中的转矩脉动。该技术并不是全新的，因为它已在特定的应用程序中出现过。相反，本文提出了一种通用方法来确定合适的电流波形，从而最大程度地减小转矩脉动。计算出的电流波形被认为是消除转矩波动的理想波形。然后考虑实际实施。给出了用于正弦波或方波电流控制的计算电流波形的过程。电流受到一些限制，因此它们呈现实际波形。然后，根据反电动势波形确定各种电流形状，同时考虑全部和部分导通周期。为了验证分析结果，计算出的电流波形已在DSP中实现，并通过磁滞电流控制器施加到表面安装的PM电动机上。提出并讨论了不同电流波形的实验结果，强调了它们在减小转矩振荡方面的有效性。

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