稀土永磁无刷直流陀螺电动机具有体积小、重量轻、效率高、温升低等许多优点,能有效地提高陀螺仪的精度。本文从定子绕组两端检测出的反电动势作为转子位置信号,并用来控制电动机的换向;为了正常启动,采用了一个简单的启动控制电路。为使电动机的转速牢牢地锁定在晶体的时钟频率上,将锁相技术与反电势控制相结合,构成一个闭环锁相伺服系统。 Rare earth permanent magnet brushless DC gyro motor with small size, light weight, high efficiency, low temperature and many other advantages, can effectively improve the accuracy of the gyro. In this paper, the back EMF detected from both ends of the stator winding is used as the rotor position signal and used to control the commutation of the motor. In order to start normally, a simple start-up control circuit is adopted. In order to make the motor speed firmly locked in the crystal clock frequency, phase-locked technology and back EMF control combine to form a closed-loop phase-locked servo system.