无轴承异步电机数学模型与解耦控制

针对无轴承异步电机是一个强耦合的非线性复杂系统,实现其电磁转矩和径向悬浮力之间的成功解耦是电机稳定悬浮工作的关键问题.在给出了无轴承异步电机径向悬浮力产生原理的基础上,推导了径向悬浮力和电机旋转部分的数学模型,并采用转子磁场定向控制策略设计了无轴承异步电机矢量控制系统,利用Matlab/Simulink工具箱对该控制系统进行了仿真.仿真试验表明,该控制系统不仅可以实现转子稳定悬浮,而且实现了径向悬浮力和旋转力矩之间的解耦控制,电机具有良好的动、静态性能.

Mathematics model and decoupling control for self-bearing induction motors

The self-bearing induction motor is a strong-coupled complicated nonlinear system. The decoupiing control of torque and radial suspension forces is the key technology of the stable operation for selfbearing motor. The principle of radial suspension force is expounded. The mathematics models of radial suspension force and the rotation part on self-bearing motor are deduced. A control system based on rotor magnetic field oriented control is designed. The control system is simulated with Matlab/Simulink toolbox. Simulation results have shown that the rotor can be subsystems can be controlled independently, the control suspended steadily, torque and radial suspension method is valid and the control system has good static and dynamic performance.