一种基于电流源逆变驱动的超高速永磁同步电机改进型控制策略  

An Improved Control Strategy for the Ultra-high-speed Permanent Magnet Synchronous Motor Based on the Current Source Inverter

作　　者：王晓琳[1] 郭慧[1] 顾聪[1] WANG Xiaolin;GUO Hui;GU Cong(Key Laboratory of More Electric Aircraft and Electrical System(Nanjing University of Aeronautics and Astronautics),Nanjing 210016,Jiangsu Province,China)

机构地区：[1]多电飞机与电气系统重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2022年第7期2733-2743,共11页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52177048);直升机传动技术国家级重点实验室基金项目(HTL-0-21G06);江苏省基础研究计划项目(BK20201297)。

摘　　要：针对传统电流源逆变器(current source inverter,CSI)超高速电机驱动系统存在的控制对象阶次高、电流调节器设计困难问题,提出基于混合型两级式CSI的改进型控制策略。其基本思想为:前级引入宽禁带(wide band gap,WBG)器件高频调节定子电流幅值;后级采用普通硅器件调节定子电流相位。在此基础上,为实现最大转矩电流比控制,提出单电流传感器锁相环(phase-locked loop,PLL)方案,通过对转子位置信号与相电流锁相实现电流相位自动校正。混合型CSI前后级通过该改进控制策略进行协同控制,从而实现闭环系统降阶。同时考虑到混合型CSI在超高基频运行条件下控制延迟的实际问题,进一步完善电流控制环路模型,并与CSI传统拓扑及其控制策略下的电流环稳定性及动态性能进行深入分析与对比。最后研制一套混合型CSI驱动平台,并以一台(550000r/min)/110W的超高速永磁同步电机(ultra-high-speed permanent magnet synchronous motor,UHSPMSM)为对象进行仿真及实验验证,结果表明混合型驱动拓扑及改进型策略具备更高的稳定裕度与动态性能。In order to solve the problems of high order of control objects and difficulty in current regulator design in traditional current source inverter(CSI)ultra-high-speed motor drive systems,an improved control strategy based on hybrid two-stage CSI was proposed.The basic idea is:the wide band gap(WBG)devices are used to adjust the amplitude of stator current with high frequency in the front stage.The ordinary silicon devices are used to adjust the current phase in the rear stage.On this basis,in order to achieve the maximum torque-to-current ratio control,a single current sensor phase-locked loop(PLL)scheme was proposed,which realized automatic current phase correction by phase-locking the rotor position signal and the phase current.The front and rear stages of the hybrid CSI were controlled cooperatively through the improved control strategy,reducing the order of the closed loop system.At the same time,considering the control delay problem of the hybrid CSI under the ultra-high fundamental frequency operation condition,the current control loop model was further improved,and the stability and dynamic performance of the current loop were deeply analyzed and compared with the traditional CSI topology and its control strategy.Finally,a hybrid CSI drive platform was developed,and a(550000r/min)/110Wultra-high-speed permanent magnet synchronous motor(UHSPMSM)was used for simulation and experimental verification.The results show that the hybrid drive topology and its improved strategy have higher stability margin and dynamic performance.

关 键 词：超高速永磁同步电机 电流源逆变器 宽禁带器件 电流环稳定性 锁相环 

分 类 号：TM341[电气工程—电机]