基于三重旋转坐标变换的双三相永磁同步电机模型预测电流控制策略  

Model Predictive Current Control Strategy for Dual Three-Phase Permanent Magnet Synchronous Motors Based on Triple Rotating Coordinate Transformation

作　　者：储炜 林黄达 易新强[1] Chu Wei;Lin Huangda;Yi Xinqiang(National Key Laboratory of Electromagnetic Energy Naval University of Engineering ,Wuhan 430033 China)

机构地区：[1]电磁能技术全国重点实验室(海军工程大学),武汉430033

出　　处：《电工技术学报》2024年第S1期51-63,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(52107136、52207047);国家自然基金青年项目(52207048);国家自然科学基金青年科学基金项目(52107136);湖北省自然科学基金一般面上项目(No.506)资助。

摘　　要：该文针对双三相永磁同步电机传统建模复杂度高、绕组电流谐波抑制困难等问题,提出一种基于三重旋转坐标变换模型的模型预测电流控制方法。该建模方法物理意义清晰,通过平衡各套绕组功率,能有效抑制绕组电流谐波,无需复杂的谐波控制方法。首先,利用双三相绕组特殊的绕组结构,将六相绕组分为三组自正交对,提出一种三重旋转坐标变换,并据此建立电机模型;然后,通过与空间矢量解耦(VSD)方法的对比分析,说明所提建模方法通过三套旋转绕组间的电流平衡实现电流谐波抑制;最后,提出基于三重旋转坐标变换的模型预测电流控制方法。仿真结果表明,基于三重旋转坐标变换能够有效抑制绕组5、7次电流谐波,无需基于VSD模型预测电流控制(VSD-MPCC)中的权重系数调整,且在理想情况下谐波抑制效果优于VSD-MPCC。The traditional vector space decoupled(VSD)-based model predictive current control(MPCC)for dual three-phase permanent magnet synchronous motors(PMSM)involves complex selection of harmonic weight coefficients.Dual d-q current control provides an alternative for balancing currents,but it introduces cross-coupling-induced harmonics and limits winding utilization,which can affect fault-tolerant operation.To address these challenges,a model predictive current control strategy based on triple rotational coordinate transformation is proposed.This study develops a mathematical model using the triple coordinate transformation method and examines its relationship with the dual d-q coordinate model and the VSD motor model.The proposed model is analyzed,and its performance is assessed through simulations.The dual three-phase windings of the PMSM are reorganized into a triple virtual stationary coordinate system(3-α-β)based on the phase alignment,which is then transformed into three sets of d-q components using the Park transform.A mathematical model of the motor is formulated within the triple d-q coordinate framework,and a comparative analysis shows that the components are decoupled.It is further demonstrated that the harmonic current components are eliminated when the currents in the triple d-q system are balanced.Simulations are conducted for both VSD-MPCC and the proposed 3dq-MPCC for validation.The simulation results demonstrate the following:VSD-MPCC effectively suppresses harmonic currents while considering the motor's dynamic performance.However,it involves a complex process for selecting weight coefficients.(1)steady-state performance comparison.In terms of phase current,the 3dq-MPCC control method consistently exhibits superior sinusoidal characteristics,lower total harmonic distortion(THD),and reduced harmonic components under varying operating conditions,including low-speed and light-load,high-speed and light-load,and high-speed and heavy-load scenarios.Under low-speed and light-load conditions,the phase curre

关 键 词：双三相永磁同步电机 三重旋转坐标系 模型预测控制 谐波抑制 

分 类 号：TM341[电气工程—电机]