Full Peed Range Sensorless Control Of Permanent Magnet Synchronous Motor With Model Reference Adaptive System

It is difficult to realize full speed range operation of a permanent magnet synchronous motor(PMSM)with a single traditional position sensorless control method,whilst special processing is usually required for the start-up.To overcome this drawback,a phased PI regulator-based model reference adaptive system(MRAS)is proposed in this work,with which the PMSM can be operated well over the full speed range.In addition,by re-constructing the 3-phase back EMF with the PWM signal and the measured DC-link voltage,the PMSM can start up with position closed-loop control at any initial rotor position,and can also run steadily at low speed.Simulation for a 1.5kW interior permanent magnet synchronous motor(IPMSM)which drives a fan is carried out to validate the proposed sensorless control at the start-up and over the full speed range.Finally,an experimental platform based on the STM32F407 single-chip microcomputer is set up to verify the feasibility and effectiveness of the phased PI regulator-based MRAS.