无轴承交替极永磁同步电动机位移自抗扰控制

Displacement Active Disturbance Rejection Control for Bearingless Consequent-Pole PMSM

无轴承交替极永磁同步电动机转子磁路采用交替极配置方式,使径向两自由度的悬浮机理有别于传统表贴式无轴承永磁同步电动机,实现了电机转矩与悬浮的内在解耦。以一台4对极无轴承交替极永磁同步电动机为例,研究了电机径向悬浮机理并推导了径向力数学模型,为径向位移控制策略的设计奠定了基础。为了实现电机径向位移高精度控制,提出电机悬浮系统径向位移自抗扰控制策略,在径向力数学模型上详细分析和阐述了径向位移自抗扰控制的基本原理及其实现方式,最后通过仿真和实验验证了所提控制策略的有效性。

Due to the rotor adopts consequent-pole structure,it leads to the different levitation principle of radial two degrees of freedom in bearingless consequent-pole PMSM when compared with the traditional surface mounted rotor in bearingless PMSM.In addition,torque control and levitation control have inherent decoupling characteristic when using consequent-pole rotor.In this paper,a bearingless consequent-pole PMSM with four pole-pairs was studied and the radial levitation principle and mathematical model of radial levitation force were analyzed and deduced respectively for radial displacement control strategy design.In order to achieve high precision control of radial displacement,the active disturbance rejection control algorithm was introduced in levitation system radial displacement control of this machine.Based on levitation force mathematical model,the principle and implementation process of radial displacement active disturbance rejection control were elaborated.Finally,the specific simulation and experiment results show the effectiveness of the proposed control strategy.