超高速电机电流源逆变器解耦控制优化策略研究  

Research on Decoupling Control Optimization Strategy of Current Source Inverter for High Speed Motor

作　　者：王晓琳[1] 严廷雄 鲍旭聪 李紫佳 WANG Xiaoin;YAN Tingxiong;BAO Xucong;LI Zijia(College of Automation Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学自动化学院,南京211106

出　　处：《南京航空航天大学学报》2023年第6期1089-1099,共11页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(52177048);江苏省自然科学基金(BK20201297)。

摘　　要：针对电流源逆变器(Current source inverter,CSI)超高速电机驱动系统控制对象阶数高、耦合强的特点,提出一种基于定子电流反馈有源阻尼的三闭环改进型解耦控制策略。首先,通过在Z域构建考虑控制延时的CSI超高速电机二阶系统等效模型,设计了复矢量解耦电流外环、前馈解耦电压内环构成的分级解耦驱动系统。其次,基于重构模型分析三闭环控制系统在全速域的稳定性,讨论了该解耦策略在高速工况下失稳与二阶系统谐振问题的相关性。本文将定子电流反馈有源阻尼引入电流环调节器,在解决高阶系统谐振问题的同时实现超高速电机在全速域的高性能稳定运行。最后搭建了550000(r⋅min^(-1))/110 W超高速永磁同步电机的CSI驱动平台,并进行相关仿真及实验验证,证明了所提改进策略的有效性和优越性。Aiming at the characteristics of high order and strong coupling of current source inverter(CSI)ultra high speed motor drive system,an improved decoupling control strategy based on stator current feedback active damping is proposed.Firstly,by constructing the equivalent model of CSI super high speed motor second-order system considering control delay in Z domain,a hierarchical decoupling drive system consisting of complex vector decoupling current outer loop and feedforward decoupling voltage inner loop is designed.Secondly,the stability of the three closed loop control system in the full speed domain is analyzed based on the reconstructed model,and the correlation between the instability of the decoupling strategy and the resonance problem of the second order system under high-speed conditions is discussed.Therefore,the stator current feedback active damping is introduced into the current loop regulator in this paper to solve the high order system resonance problem and realize the high performance and stable operation of the ultra high speed motor in the full speed domain.Finally,a CSI drive platform of 550000(r·min^(-1))/110 W ultra high speed permanent magnet synchronous motor is built,and relevant simulations and experiments are carried out to verify the effectiveness and superiority of the proposed improvement strategy.

关 键 词：电流源逆变器 控制延时 复矢量解耦控制技术 离散域建模 有源阻尼策略 

分 类 号：TM351[电气工程—电机] TH133.3[机械工程—机械制造及自动化]