T型三电平逆变器馈电双三相PMSM直接转矩控制

发布时间：2019-03-30 22:42

【摘要】：提出了一种T型三电平逆变器馈电双三相PMSM驱动系统直接转矩控制(DTC)策略。该系统既具有多相电机转矩脉动小、电流应力小和故障容错能力强的优点,也继承了T型三电平电机驱动谐波性能好、可靠性高的特点。该文所提出的基于双空间矢量调制(SVM)技术的直接转矩控制策略保留了DTC快速动态响应特性。与基于空间矢量解耦(VSD)的SVM技术相比,双SVM技术避免了复杂的矢量合成过程,并具有良好的谐波控制效果。所提出的控制策略还设计了谐波电流闭环控制器,能够有效抑制由绕组不对称、反电动势谐波、死区等非线性因素引起的低次谐波电流。通过实验验证了所提出的T型三电平逆变器馈电双三相PMSM驱动系统DTC策略的有效性。
[Abstract]:A direct torque control (DTC) strategy for dual three-phase PMSM drive system with T-type three-level inverters is presented in this paper. The system not only has the advantages of low torque ripple, low current stress and strong fault tolerance ability of multi-phase motor, but also inherits the characteristics of T-type three-level motor with good driving harmonic performance and high reliability. The proposed DTC strategy based on dual space vector modulation (SVM) preserves the fast dynamic response of DTC. Compared with the SVM technology based on space vector decoupling (VSD), the dual SVM technique avoids the complex vector synthesis process and has a good harmonic control effect. The proposed control strategy also designs a harmonic current closed-loop controller, which can effectively suppress the low-order harmonic current caused by non-linear factors such as winding asymmetry, anti-electromotive force harmonic, dead time and so on. The effectiveness of the proposed DTC strategy for a two-phase three-phase PMSM drive system with T-type three-level inverters is verified by experiments.
【作者单位】：东南大学电气工程学院;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB035603) 国家自然科学基金项目(51137001) 江苏省青蓝工程项目(1116000195)资助
【分类号】：TM341;TM464

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