Research On The High Performance Speed Regulation Control Methods Of IPMSM

Interior permanent magnet synchronous motors (IPMSM) have been widely used in hybrid electric vehicle for its high power density, high efficiency and wide range of speed regulation. It has become the first choice for the electric car. This paper focus on how to improve the high output torque, stable operation, fast dynamic response, high efficiency and wide range of speed regulation, the responsive control strategies has been researched and simulated.First, the current controller completes the decoupling control by the feedback compensation method, and the parameters numeration of the current controller is completed, improving the dynamic response of the current controller. The voltage saturation of the current controller is analysed by simulation, and the calculation method of the anti-windup have side effect on the flux-weakening.Second, Due to the DC voltage limitation of the inverter, the current controller is often saturated. This paper designs the flux-weakening control algorithm based on over-modulation of the SVPWM and anti-windup saturation, this strategy is based on the difference of the output voltage and the voltage of the machine that through the SVPWM over-modulation to adjust d axis current, realizing to increase speed.Finally, the simulink model of the speed regulation system is established. Through the simulation, the optimized flux-weakening control algorithm is proved, and the feasibility of the control algorithm is verified. This strategy can satisfy the control requirements of the higher output torque ability request, and improve and optimize the flux-weakening control algorithm, this algorithm enhances the utilization rate of the DC voltage side, and make full use of the capacity of the control system and improve the efficiency of the system, and the system can output higher torque in high speed operation. In this flux-weakening algorithm, the anti-windup control link is designed to inhibit the voltage saturation.