双永磁同步电机系统非级联预测速度同步控制

Non-cascaded Predictive Speed Synchronous Control of Dual Permanent Magnet Synchronous Motor System

针对传统双电机控制系统中,运动惯性以及响应不及时等影响速度同步精度和动态响应速度的问题,本文提出了一种双永磁同步电机系统非级联预测速度同步控制策略,将双电机系统看作一个多输入多输出系统进行统一建模,应用有限控制集模型预测控制设计一个紧凑的双电机系统控制器,并将速度同步误差、速度跟踪误差和电机运行性能同时引入模型预测控制的价值函数中,实现多变量的协同优化控制。此外,为满足实际用户需求,引入弱磁、电流限制两个前端模块实现对电压、电流的约束。最后通过仿真进行了转速阶跃信号跟踪、抗负载扰动等对比验证,结果证明所提出的非级联预测速度同步控制策略较传统交叉耦合控制策略能够更有效提升双永磁同步电机系统的转速同步控制性能。

Aiming at the problems of the motion inertia and the unresponsive response affect the speed synchronization accuracy and dynamic response speed in the traditional dual-motor control system,this paper proposed a non-cascaded predictive speed synchronization control strategy for the dual permanent magnet synchronous motor system,which was regarded as a multi-input and multi-output system for unified modeling.A compact dual-motor system controller was designed using the finite control set model predictive control,and the speed synchronization error,speed tracking error and the motor operation performance were introduced into the cost function of model predictive control to realize the multi-variable collaborative optimization control.In addition,in order to meet the actual user needs,the two front-end modules of flux weaken and current limit were introduced to achieve voltage and current constraints.Through simulation,the speed step signal tracking and anti-load disturbance were compared and verified.The results show that the proposed non-cascaded predictive speed synchronization control strategy can improve the speed synchronization control performance of the dual permanent magnet synchronous motor system more effectively than the traditional cross-coupling control strategy.