基于六边形轨迹的永磁辅助式同步磁阻电机弱磁控制策略  

Hexagon Trajectory Flux⁃weakening Control Strategy for Permanent Magnet Assisted SynRM

作　　者：李伟[1] 罗成[1] 杨凯[1] 王旭明 邱凌烽 黄煜昊 LI Wei;LUO Cheng;YANG Kai;WANG Xuming;QIU Lingfeng;HUANG Yuhao(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电气传动》2024年第8期19-26,共8页Electric Drive

基　　金：国家自然科学基金(52237002,52207055);中国博士后科学基金(2022M721232,2023T160243);湖北省重点研发计划(2022BAA097,2022BAA100)。

摘　　要：永磁辅助式同步磁阻电机在高速工况弱磁运行时,直流母线电压利用率不高,电机的效率与转矩输出能力较低。为此,提出了一种基于六边形轨迹的永磁辅助式同步磁阻电机弱磁控制策略。首先,以永磁辅助式同步磁阻电机的d-q轴等效电路为基础,推导了弱磁过程的电压和电流约束,证明弱磁控制提升电机调速能力的根本原因。其次,为充分发挥永磁辅助式同步磁阻电机高速运行下功率密度较高的优势,进而推导过调制算法。并将其应用于永磁辅助式同步磁阻电机的弱磁操作中,以实现更高的直流母线电压利用率。最后,通过仿真验证所提出方法的有效性。When the permanent magnet assisted synchronous reluctance motor(PMaSynRM)runs at highspeed with flux-weakening control,the DC bus voltage utilization is not high,and the efficiency and torque output capacity of the motor are low.Therefore,a flux-weakening control strategy of permanent magnet assisted synchronous reluctance motor based on hexagonal trajectory was proposed.Firstly,based on the d-q axis equivalent circuit of the permanent magnet assisted synchronous reluctance motor,the voltage and current constraints of the flux-weakening process were derived,and the root cause of the flux-weakening control to improve the speed regulation ability of the motor was proved.Secondly,in order to give full play to the advantages of high-power density under high-speed operation of permanent magnet assisted synchronous reluctance motor,the overmodulation algorithm was derived.It was applied to the flux-weakening operation of permanent magnet assisted synchronous reluctance motor to achieve higher DC bus voltage utilization.Finally,the effectiveness of the proposed method was verified by simulation.

关 键 词：弱磁控制 永磁辅助式同步磁阻电机 电压利用率 过调制 

分 类 号：TM352[电气工程—电机]