无刷直流陀螺电机的高精度恒速控制  

High Accuracy Constant Speed Control of Brushless DC Gyro Motor

作　　者：季小尹[1] 张万红[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《中国惯性技术学报》2003年第6期108-110,共3页Journal of Chinese Inertial Technology

摘　　要：介绍了一种能够实现三相绕组无刷直流陀螺电机的锁相恒速控制方法,所提出的定脉冲三相移电路是将高精度的参考脉冲信号移相成频率不变、相位差为120°的三组脉冲信号,分别与各相反电势检测整形的反馈信号进行相位比较,由该比较输出的数字脉冲信号直接控制电机的三相绕组导通工作。锁定时,使电机反电势的频率脉冲与参考脉冲成为一一对应的关系,电机就处于高精度恒速运行。通过样机试验,其恒速控制精度达到0.001%。A method of the phase-locked constant speed control for the three-phase winding brushless DC gyro motor is introduced. A circuit is described in this paper, in which one constant frequency pulse is changed into three-phase pulse. The frequency of three-phase pulse is the same as the reference pulse. The phase difference of three-phase pulse is 120°between each other. One phase pulse is correlative with one counter electromotive force signal of three-phase winding. In steady state, the motor runs at high accuracy constant speed. This method has been used on a brushless DC gyro motor. The constant speed accuracy has been up to 0.001%.

关 键 词：无刷直流 陀螺电机 恒速控制 相位差 脉冲信号 移相成频率 反电势检测 定脉冲三相移电路 

分 类 号：TM33[电气工程—电机]