Digital realization method of power electronic AC motor

The three-phase Power Electronic Load (PEL) simulation of the asynchronous motor operation can be the divided into AC sine wave drive mode, the inverter open-loop drive mode and the inverter closed-loop drive mode. The control strategy of these three kinds of working conditions is simple to complex, and has certain inheritance and progressive relations. In the AC sine wave drive condition, the discrete solution method of the motormathematical model is studied and a current tracking control strategy based on the deadbeat controller is proposed. In the inverter open-loop drive mode, a new method of PWM pulse voltage detection based on FPGA is proposed to improve the accuracy of the motor model. In the inverter closed-loop drive mode, a simulation method based on antielectromotive force is proposed to solve the coupling problem of two converters. Simulation and experiments verify the effectiveness of these methods.