基于电流预测及谐波抑制的双三相永磁同步电动机容错控制研究

Research on fault-tolerant control of dual three-phase permanent magnet synchronous motor based on current prediction and harmonic suppression

针对传统的比例积分(PI)控制器在双三相永磁同步电动机(DTP-PMSM)容错控制系统中存在响应速度慢及谐波电流大的问题,本文提出一种基于电流预测及谐波抑制的DTP-PMSM容错控制策略,通过对一相绕组故障后的DTP-PMSM进行建模,然后对电压方程进行二次解耦变换,在基波子平面的电流环中引入无差拍控制器以提高系统的动态响应速度,同时在谐波子空间引入比例谐振(PR)控制,抑制谐波电流对电动机运行的影响。通过仿真结果对比表明,所研究的容错控制策略能使电动机在单相断相后保持稳定运行,且相较于传统PI控制器,在动态响应速度及谐波抑制方面具有一定优化效果。

For the traditional proportional integral(PI)controller,there are problems of slow response speed and large harmonic current in the fault-tolerant control system of dual three-phase permanent magnet synchronous motor(DTP-PMSM).This paper proposes a DTP-PMSM fault-tolerant control strategy based on current prediction and harmonic suppression,and models the DTP-PMSM after the fault of one phase winding.Then,the voltage equation is decoupled twice,and a beatless controller is introduced in the current loop of the fundamental subplane to improve the dynamic response speed of the system.The proportional resonance(PR)control is introduced in the harmonic subspace to suppress the influence of harmonic current on motor operation.The fault-tolerant control strategy can keep the motor running stably after phase failure,and has a certain optimization effect in dynamic response speed and harmonic suppression compared with traditional PI controllers.