基于复矢量的电流环解耦控制方法研究

发布时间：2018-07-09 15:16

本文选题：永磁同步电机 + 矢量控制　；参考：《中国电机工程学报》2017年14期

【摘要】：永磁同步电机(permanent magnet synchronous motors,PMSM)采用矢量控制后,可以实现电流静态解耦,但动态耦合关系依然存在,而且随着转速的升高,耦合作用的影响也越来越严重。传统的电压前馈解耦控制(voltage feed forward decoupling control,VFDC)对参数变化敏感,因此提出一种基于复矢量的电流环解耦控制策略。电机模型包含一个随速度变化的极点,因此电压前馈解耦控制器的固定零点很难保证全速度范围内的零极点对消;复矢量控制器包含一个随速度变化的虚轴零点,从而实现控制器的零点与被控对象的极点完全解耦。该文采用复矢量的分析方法建立了更精确的电机控制模型,并通过传递函数对解耦特性进行了分析,在此基础上给出了可用于仿真和实验的d-q轴的控制模型。仿真和实验结果表明复矢量解耦控制器有效提高了电流环的控制性能。
[Abstract]:Permanent magnet synchronous motor (PMSM) can realize static decoupling of current with vector control, but the dynamic coupling relationship still exists, and the effect of coupling becomes more and more serious with the increase of rotational speed. Traditional voltage feedforward decoupling control (voltage feed forward decoupling) is sensitive to parameter changes, so a current loop decoupling control strategy based on complex vector is proposed. The motor model contains a pole changing with the speed, so the fixed zero point of the voltage feedforward decoupling controller is difficult to guarantee zero pole cancellation in the full speed range, and the complex vector controller contains a fictitious axis zero point with the change of the speed. Thus, the zero of the controller is decoupled from the pole of the controlled object. In this paper, a more accurate motor control model is established by using complex vector analysis method, and the decoupling characteristics are analyzed by transfer function. Based on this, a control model of d-q axis for simulation and experiment is presented. Simulation and experimental results show that the complex vector decoupling controller can effectively improve the control performance of the current loop.
【作者单位】：上海新时达电气股份有限公司;华中科技大学自动化学院;
【基金】：上海市青年科技启明星计划(15QB1404200)~~
【分类号】：TM341;TP273

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