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首页> 外文期刊>Power Electronics, IET >Generalised current and voltage shaping method via modified d–q transformation for the torque harmonics correction in PMSMs
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Generalised current and voltage shaping method via modified d–q transformation for the torque harmonics correction in PMSMs

机译：通用电流和电压整形方法通过改进的<斜体> D - <斜斜度> q PMSMS扭矩谐波校正的变换

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摘要

This study deals with a novel control strategy for permanent magnet synchronous machines (PMSMs) to incorporate harmonics compensation features within the current controller, maintaining the integrity of the reference tracking performances. The authors' application in this context is devoted to the improvement of the torque produced by a PMSM, in particular, it is proposed the effective reduction of the undesired harmonic content of the torque due to the non-sinusoidal spatial distribution of the flux density in the air-gap. With the knowledge of the back electro-magnetic force shape, the determination of the current waveforms necessary to produce a smooth torque is enabled and via model-based considerations, the corresponding required voltage waveforms are computed. Subsequently, the reasoning is extended to the flux weakening operation of the machine. Finally, it is applied to the more common case of interior PMSMs, which additionally exhibit a reluctance torque component. The analytical solutions found are used in place of the classical alpha beta/dq Park-transformation, thus impressing the appropriate current waveforms to the machine without modifying any functionality within the main current controller. The effectiveness of the proposed strategy is verified by experimental results.
机译：本研究涉及永磁同步机（PMSMS）的新型控制策略，用于在当前控制器内结合谐波补偿特征，维持参考跟踪性能的完整性。在这种情况下，作者的应用专门用于改进PMSM产生的扭矩，特别是提出了由于磁通密度的非正弦空间分布而有效降低扭矩的不期望的谐波含量气隙。随着背部电磁力形状的知识，使得能够确定产生平滑扭矩所需的电流波形，并通过基于模型的考虑，计算相应的所需电压波形。随后，推理扩展到机器的磁通量弱化操作。最后，将其应用于内部PMSM的更常见的情况，该内部PMSMS另外表现出磁阻扭矩分量。发现的分析解决方案用于代替经典的alpha beta / dq公园变换，从而将适当的电流波形印在机器上，而不会修改主电流控制器内的任何功能。通过实验结果验证了所提出的策略的有效性。

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