Sensorless Control Application of BLDC Motor Based on Back EMF
This paper proposes a sensorless drive of BLDC motor by detecting the back electromotive force(EMF)to judge the rotor position of the motor.The basic principle of the back EMF method,the judgment and processing of zero-crossing signal and the soft start of the brushless DC motor without position sensor are analyzed.According to the hardware platform,the delay processing program is adjusted in the test to make the brushless DC motor start smoothly and efficiently.
closed loopback EMF methodBLDC motorsensorless control
NETL
NSTL
万方数据
维普
