永磁同步电机谐波电压与电流的耦合模型及前馈控制

发布时间：2018-03-17 16:03

本文选题：永磁同步电机　切入点：多同步旋转坐标系　出处：《电工技术学报》2017年18期 　论文类型：期刊论文

【摘要】：以一组正负序谐波电流对为研究对象,构建了多同步旋转坐标系下永磁同步电机的谐波电压模型,该模型揭示了正负序谐波电压与谐波电流之间的耦合关系。通过在传统矢量控制系统上增加参考谐波电流计算模块与前馈谐波电压计算模块,构建一种谐波电流注入控制系统,该系统中电流比例积分(PI)控制器只需完成基波电流对应直流量的跟踪,谐波电流的跟踪性能则由前馈的谐波电压保证。选取两种永磁同步电机作为谐波电流注入的试验对象,对比具有前馈谐波电压的系统与仅包含电流PI控制器的系统的谐波电流响应结果,台架试验结果表明前馈谐波电压能够有效地改善高频谐波电流注入的效果,另外从时域及频域分别对电机输出的转矩脉动信号进行对比和分析,结果表明:利用前馈谐波电压能更准确地完成谐波电流的注入,进而实现永磁同步电机转矩脉动的有效抑制。
[Abstract]:Taking a group of positive and negative sequence harmonic current pairs as the research object, the harmonic voltage model of permanent magnet synchronous motor in multi-synchronous rotating coordinate system is constructed. The model reveals the coupling relationship between positive and negative sequence harmonic voltage and harmonic current. By adding reference harmonic current calculation module and feedforward harmonic voltage calculation module to the traditional vector control system, a harmonic current injection control system is constructed. In this system, the current proportional integral (Pi) controller only needs to complete the tracking of the fundamental current corresponding to the direct current, and the tracking performance of the harmonic current is guaranteed by the feedforward harmonic voltage. Two kinds of permanent magnet synchronous motors are selected as the test objects of harmonic current injection. The harmonic current response of the system with feedforward harmonic voltage is compared with that of the system with only current Pi controller. The bench test results show that the feedforward harmonic voltage can effectively improve the effect of high frequency harmonic current injection. In addition, the torque ripple signals of the motor are compared and analyzed from the time domain and the frequency domain respectively. The results show that the harmonic current injection can be completed more accurately by using the feedforward harmonic voltage. Thus, the torque ripple of PMSM can be effectively suppressed.
【作者单位】：同济大学汽车学院;
【基金】：国家自然科学基金面上项目(51575392) 国家科技支撑计划(2015BAG17B00、2015BAG03B00)资助
【分类号】：TM341

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