【作者】 潘伟； 许波； 孙晓东； 朱熀秋；

【Author】 PAN Wei,XU Bo,SUN Xiaodong,ZHU Huangqiu School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,P.R.China

【机构】 江苏大学电气信息工程学院；

【摘要】 针对无轴承永磁同步电机是一个强耦合的非线性复杂系统,为解决精确解耦控制困难的问题.本文将传统永磁同步电机直接转矩控制的理论和方法应用于无轴承永磁同步电机转矩控制;借鉴传统永磁同步电机直接转矩控制的思想,通过构造无轴承永磁同步电机转子径向位移和径向悬浮力双闭环控制系统对径向悬浮力实行直接控制。推导了基于空间矢量脉宽调制策略的转矩和悬浮力直接控制算法,在此基础上,设计了转矩和悬浮力直接控制系统并用MATLAB对其进行仿真,该控制系统结构简单而且具有较强的鲁棒性.仿真试验结果表明,该控制系统不仅可以实现电机转子稳定悬浮,而且表现出很好的解耦性能,实现了电机转矩和悬浮力的独立控制,电机具有良好的动静态性能.更多还原

【Abstract】 The bearingless permanent magnet synchronous motor is a strong-coupled nonlinear system.To solve the difficult problem of precise decoupling control,the theory and method of direct torque control of traditional permanent magnet synchronous motor are applied to the torque control of a bearingless permanent magnet synchronous motor in the paper.With the reference of direct torque control of traditional permanent magnet synchronous motor,a double closed-loop control system of rotor radial displacement and radial suspension force is constructed to control the radial suspension force directly.A direct torque and suspension force control algorithm based on space vector pulse width modulation strategy is deduced,the direct torque and suspension force control system is designed and simulated by MATLAB.The control system is simple and robust. The simulation results have shown that the rotor can be suspended stability,the control algorithm performs very good decoupling in torque and radial suspension force control and torque and radial suspension force subsystems can be controlled independently, the control method is valid and the control system has a good static and dynamic performance.更多还原