【摘要】 针对直流无刷电机(BLDCM)矢量控制系统无速度传器的问题,提出了一种带锁相环(PLL)滤波的Luenberger观测器的速度估计方法。根据两相静止坐标系下的同步电机方程,利用Luenberger观测器估算出反电动势分量;设计锁相环对反电动势中的噪声滤波,提高了速度及位置观测值的精度和抗干扰能力。在Matlab/Simulink平台上验证了该观测器的可行性。利用以STM32F103x为主控制器的变频空调实验平台,实现了提出的BLDCM无传感器矢量控制系统。实验结果表明:该方法能够在较宽的调速范围内准确地估计出速度及转子位置,系统稳态精度高、响应速度快,方法简单易实现,便于实际的工程应用。更多还原

【Abstract】 A speed estimation method based on Luenberger observer and phase locked loop(PLL)is proposed for speed sensorless field oriented control technology of brushless DC motor(BLDCM).According to voltage equations of motor under static coordinate system,Luenberger observer is introduced to estimate back EMF components.In order to obtain accurate position observation and improve the observer anti-interference ability,PLL is designed as a noise filter for back EMF observation.This method is thoroughly tested by Matlab simulation and realized on air conditioner development platform.The experimental results show that the method can estimate the rotor speed with high steady-state accuracy and be easily implemented for engineering application.更多还原