DTC-based Variable Frequency Speed Control of Asynchronous Motor

With the development of power electronic technology,the variable frequency speed control technology develops from traditional SPWM to DTC.With low speed and long calculating period,the early MCU control circuit can not fit for the high speed of variable frequency speed control technology.Being a new control core,DTC has already replaced MCU in control circuit.This paper introduces the characteristics of control chip 80C196MC in DSP,and puts forward 80C196MC-centered digital controlling scheme to achieve the speed control of asynchronous motor.According to the particular characteristics of 80C196MC,the hardware circuit in control circuit is designed and the process is programmed with software.All of these aim to carry out the DTC control in asynchronous motor.