Abstract：Aiming at the strong coupling problem between electromagnetic torque and radial suspension force in bearingless synchronous reluctance motors (BSRMs), various decoupling control methods were investigated and analyzed. The rotor suspension principle and the mathematical model of BSRMs were introduced, and the reported decoupling control strategies of BSRMs were summarized. The principle, performance, limitation and development of some reported control strategies for BSRMs including feedforward and feedback compensation control, inverse system control, neural network inverse control, support vector machine inverse control, differential geometry based exact linearization control and direct torque and suspension force control strategy were analyzed respectively. According to the characteristics of BSRMs, the future research directions were pointed out. Some suggestions for BSRMs of precise mathematical model construction with magnetic saturation, motor parameters online identification, application of intelligent control to increase disturbance attenuation capacity, parameter optimal design of decoupling controller and nonlinear controller design based on nonlinear control theory are proposed.
2017, Vol. 38 
