The Research Of The Permanent Magnet Synchronous Motor Sensorless Control System Based On A Low Resolution Hall Position Sensor

The global energy consumption is now increasing with the rapidly expanding economy of the world,it alerts people to the activities of energy efficiency and savings.The motors consume large parts of industrial power,particularly heavy use of DC motors and asynchronous motors that have a low efficiency,permanent magnet synchronous motors have been highly valued and vigorous developed in recent decades with its’ high power factor,high efficiency,fast dynamic response and small size,etc.,the interior permanent magnet synchronous motor(IPMSM)has been widely made use of in the fields of high performance industrial occasions for its strong overload ability and fitness for flux weakening control.It usually needs to install the position sensor,like encoding disk,to get the information of motor position.However,the use of high resolution mechanical position sensors may increase the system volume and cost and reduce the system reliability.Therefore,this paper presents a sensorless control algorithm of the interior permanent magnet synchronous motor with a low resolution Hall position sensor,based on the Luenberger observer that estimates motor position and speed.Build mathematical model for the proposed Luenberger observer.Build Simulink model for the designed method and run simulation to verify that the proposed method is applicable on the theory level.The research is based on STM32F103 platform.The measurement results show the transition process from a Hall sensor algorithm to the sensorless control algorithm is smooth and the phase current possess a continuous sine characteristic,less harmonics and noise.Motor control system efficiency used the algorithm is higher than 80% within the speed range of 1000 r/min to 4000 r/min.The system used the algorithm has lower cost and higher performance advantage than the traditional system.