Bearingless synchronous reluctance motor decoupling control system and construction method thereof

The invention discloses a bearingless synchronous reluctance motor decoupling control system and a construction method thereof, which are used for suspension and speed control. When the system is used, an extended SVPWM (space vector pulse width modulation) inverter is firstly constructed to supply power for a motor torque winding and a suspension winding; then a magnetic field oriented decoupling model is constructed to realize the decoupling control of the motor before the magnetic field oriented decoupling model is concatenated to the extended SVPWM inverter; and finally an extended closed loop regulator is designed to realize high-performance closed-loop control on the system. According to the system provided by the invention, the extended closed loop regulator and the magnetic field oriented decoupling model can be realized by using a digital signal processor (DSP); besides, the system also comprises a displacement and current sensor and a photoelectric decoder which are used for acquiring current, displacement and a rotor location angular signal required by analysis and control of the DSP. The system and the method provided by the invention are used for the decoupling control of the bearingless synchronous reluctance motor with simple algorithm and excellent performance.