基于四桥臂的三次谐波注入式永磁同步电机转矩密度优化  

Torque Density Optimization of Third Harmonic Injection Permanent Magnet Synchronous Motor Based on Four-Leg

作　　者：马嘉杰 孙培德[1] MA Jia-jie;SUN Pei-de(School of Information Science and Technology,Donghua University,Shanghai 201600,China)

机构地区：[1]东华大学信息科学与技术学院,上海201600

出　　处：《微特电机》2021年第1期1-4,共4页Small & Special Electrical Machines

摘　　要：与传统绕组星形连接的永磁同步电机相比,基于四桥臂拓扑的永磁同步电机绕组中性点与第四桥臂相连接,为三次谐波电流提供通道,通过外部注入三次谐波电流,可提高电机的电磁转矩。建立三相四桥臂永磁同步电机系统的数学模型,并设计了矢量控制系统,在相电流幅值不变的前提下注入三次谐波电流,分别实现对基波和三次谐波的闭环控制,得到谐波注入后转矩密度显著提高,通过仿真验证了该方案的可行性。Compared with the traditional PMSM with the star-connection winding,the winding neutral point of PMSM based on the four-leg topology was connected with the fourth leg,which provided a channel for the third harmonic current.The electromagnetic torque of the motor could be improved by the external injection of the third harmonic current.The mathematical model of the three-phase four-leg permanent magnet synchronous motor system was established,and a vector control system was designed,third harmonic current was amplituded on the premise of constant phase current,the closed-loop control of fundamental wave and third harmonic were achieved respectively,torque density was increased significantly after the harmonic injection,the feasibility of the scheme was verified by simulation.

关 键 词：三相四桥臂 矢量控制 三次谐波注入 转矩密度 

分 类 号：TM464[电气工程—电器]