变频空调用直流无刷电机转子位置检测技术研究  

Technical Research on Rotor Position Detection of BLDC in Inverter Air Conditioner

作　　者：黄润宇 李庆 高晓峰 

机构地区：[1]珠海格力电器股份有限公司,珠海519110

出　　处：《日用电器》2020年第11期29-32,共4页ELECTRICAL APPLIANCES

摘　　要：随着能效等级提升,变频空调用无刷直流电机的份额正在迅速扩大。无刷直流电机转子位置检测有两种,一种是有位置传感器检测,另外一种是无位置传感器检测。因为无位置传感器检测比有位置传感器检测减了几个关键元器件,能减少电机控制器的成本,所以无位置传感器检测在无刷直流电机的比例正在逐步变大。目前行业中,无位置传感检测是利用采样电阻采集反电势过零点的方法来检测和计算转子的位置,然而,通过算法计算得出来转子位置和实际的转子位置会存在偏差,会使得电机性能下降、导致转矩波动从而产生噪音等问题。本文通过了模拟仿真以及实测分析,提出一种新的转子位置检测辅助技术,用于提高无刷直流电机无传感器检测的转子位置检测精度。As the energy efficiency rating increases,the share of brushless DC motors used in inverter air conditioners is rapidly expanding.There are two types of rotor position detection for brushless DC motors,one is sensor detection and the other is sensorless detection.Because sensorless detection reduces the cost of the controller by reducing several key components compared to sensor detection,the proportion of sensorless detection in brushless DC motors is gradually increasing.In the current industry,sensorless detection is the use of sampling resistors to collect the zerocrossing point of the back EMF to detect and calculate the position of the rotor.However,the actual rotor position and the rotor position calculated by the algorithm may be deviated,causing problems such as a decrease in motor performance and a noise problem due to torque ripple.In this paper,through the simulation and actual measurement analysis,a new auxiliary technology for rotor position detection is proposed to improve the rotor position detection accuracy of sensorless detection of brushless DC motor.

关 键 词：无刷直流电机 无传感器检测 转子位置检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TM33[自动化与计算机技术—控制科学与工程] TM925.12[电气工程—电机]