基于模型预测控制的PMSM弱磁策略  

Flux Weakening Strategy of PMSM Based on Model Predictive Control

作　　者：周致文 赵世伟[1] ZHOU Zhiwen;ZHAO Shiwei(School of Electric Power,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学电力学院,广州510641

出　　处：《微电机》2024年第10期9-14,25,共7页Micromotors

基　　金：广东省自然科学基金(2018A0303130221)。

摘　　要：针对永磁同步电机在电压反馈弱磁控制策略下,不佳的电压外环控制参数引起电流振荡和电流调节器饱和等问题,提出基于模型预测控制的弱磁策略。首先,通过将电压方程中的非线性耦合项和转速作为状态变量之一,得到电流环的线性模型;然后,基于该模型,模型预测控制以电流跟踪误差和d-q轴控制电压增量为优化目标,在每个采样周期求解有限时域内的优化问题,得到d-q轴控制电压。最后,仿真和实验结果表明,相较于传统电压反馈弱磁策略,所提出的弱磁策略的电流响应性能对电压外环的控制参数鲁棒性更高。In order to solve the problem of current oscillation and current regulator saturation under the voltage feedback flux weakening control strategy of permanent magnet synchronous motor,which caused by poor voltage external loop control parameters,a flux weakening strategy based on model predictive control was proposed.Firstly,the linear model of the current loop was obtained by taking the nonlinear coupling term and the speed of the voltage equation as one of the state variables.Then,based on the model,the model predictive control took the current tracking error and the d-q axis control voltage increment as the optimization objectives,and solved the optimization problem in the finite time domain in each sampling period to obtain the d-q axis control voltage.Finally,the simulation and experimental results show that the current response performance of the proposed strategy is more robust to the control parameters of the voltage outer loop than that of the traditional voltage feedback strategy.

关 键 词：永磁同步电机 弱磁控制 模型预测控制 

分 类 号：TM341[电气工程—电机] TM351