Abstract: In order to improve the reliability and reduce the system cost of mine asynchronous motor in complex service environment,a speed sensorless vector control system for mine asynchronous motor was designed by combining the asynchronous motor vector control technology with the speed sensorless technology.This paper analyzed vector control technology and SV PWM modulation technology,introduced the idea of model reference self-adaptation into the design of speed sensorless,and simulated the designed system with MATLAB/Simulink simulation software.Simulation results showed that the designed speed sensorless vector control system had good static and dynamic characteristics。It stated that the speed sensorless vector control system has good application values in the field of mine motor control.

Key words: Mining motor, Vector control, SVPWM, Model reference self-adaptation, Speed sensorless