一种共享逆变器的双永磁同步电机传动系统的拓扑及控制  

Topology and Control of Shared Inverter Dual Permanent Magnet Synchronous Machines Drive System

作　　者：李军军[1] 李中启[1] 易吉良[1] LI Junjun;LI Zhongqi;YI Jiliang(College of Railway Transportation,Hunan University of Technology,Zhuzhou 412000,Hunan,China)

机构地区：[1]湖南工业大学轨道交通学院,湖南株洲412000

出　　处：《电气传动》2023年第2期39-48,共10页Electric Drive

基　　金：湖南省自然科学基金省市联合基金(2019JJ60066);湖南省教育厅科研项目(19C0598)。

摘　　要：共享逆变器可简化传统轴控模式下的双机传动系统的拓扑结构,降低装置的体积和重量。针对共享逆变器传动系统中单台电机的电压利用率低,导致电机牵引特性恒功区缩短,难以实现大功率输出的问题,研究了一种新型共享逆变器的ZS9-双永磁同步电机传动系统。利用分时控制原理研究了双机的恒转矩-弱磁控制策略,根据七段式空间矢量脉宽调制原理研究了最佳开关序列及Z源直通零矢量的生成、分配方法,采用间接电压法对Z源电压进行控制。通过离线及硬件在环模拟了多种运行工况,实验结果表明:共享逆变器传动系统中的双机可分别独立控制,能满足实际工程应用的需求。Shared inverter can simplify the topology of the dual machines drive system under the traditional axis control mode,reduce the volume and weight of the equipment. In view of the low voltage utilization rate of a single motor in the shared inverter drive system,which leads to the shortening of the constant power area of motor traction characteristics and the difficulty in realizing high-power output,a new Z-source nine switch(ZS9)dual permanent magnet synchronous machine(PMSM)drive system of shared inverter was studied. The constant torque and field weakening control strategy of dual machines were studied by using the time-sharing control principle,according to the principle of seven segment space vector pulse width modulation(SVPWM),the optimal switching sequence and the generation and distribution method of Z-source shoot-through zero vector were studied,the indirect voltage method was used to control the Z-source voltage. A variety of operating conditions were simulated by off-line and hardware in the loop,the experimental results show that the dual machines in the shared inverter drive system can be controlled independently,which can meet the needs of practical engineering applications.

关 键 词：共享逆变器 Z源 永磁同步电机 分时控制 直通零矢量 

分 类 号：TM34[电气工程—电机]