摘要
本文针对正弦波反电动势的无刷直流电机(BLDCM),提出了一种基于改进滑模观测器的无位置传感器控制方法,实现了无刷直流电机在无位置传感器下的速度和电流双闭环矢量控制。改进的滑模观测器采用变滑模增益的符号函数构建电流观测器,反电势观测器提取反电动势估计值,并通过锁相环方式计算转速和位置。利用Matlab/Simulink搭建了BLDCM无位置传感器矢量控制系统仿真模型,仿真结果表明,该方案能够更好地实现BLDCM在中高速范围内的转子位置和转速估计。
This paper proposed a sensorless control method based on improved sliding mode observer for the sinusoidal back emf brushless DC motors, implemented the speed and current double closed-loop vector con- trol of BLDCM without position sensor. Improved sliding mode observer construct the current observer using the sign function with variable sliding mode gain, and extract the estimation value by EMF observer, and the rotor speed and position were gained by phase-locked loop （PLL）. The simulation model of BLDCM sensor- less vector control system was built using Matlab/Simulink, and the simulation results show that the scheme can estimate the rotor position and speed efficiently, and has good control performance. The proposed scheme can realize the rotor position and speed estimation of BLDCM in the medium and high speed range better.
出处
《微电机》
2017年第11期30-34,共5页
Micromotors
