摘要
无刷直流电机无位置传感器控制算法是近年来研究的热点之一。无位置传感器控制中端电压检测法原理简单、控制精确,因此成为无刷直流电机无位置传感器控制中最常用的方法。通过建立无刷直流电机的仿真模型,发现端电压检测法随着转速的升高,由于低通滤波电路相移的增大,原本的30°-α换相策略容易出现电机失步,位置检测无法实现。提出一种基于30°-α和90°-α滞环切换的换向信号补偿策略,经过仿真验证,该方法在电机高速运行情况下同样适用,使电机可以在较宽的速度范围内确定转子位置信息,并且加入转矩波动较小。
Sensorless brushless DC motor control is on of the hot spots in recent years. Terminal voltage method in sensorless control has the advantages of simple and accurate, so it becomes the most commonly used method in BLDCM sensorless control. Through constructing the simulation model of BLDCM, discover that accompany with the speed rising, according to the phase shifting of low-pass filter cicuits increasing, the former 30°-α commutation strategy is easy to cause the out-of step of the motor, letting the position detacting useless. Proposed a commutation signal compensation strategy based on hysteresis switching of 30°-α and 90°-α, through the verification of simulation, the method can be applied in the motor of high speed running, letting the motor catching rotation location information in the wide range of speed, and rippleless when adding torque.
出处
《微电机》
2017年第9期38-42,共5页
Micromotors
