线性光耦在BLDCM控制系统中的应用  

Application of linear optocoupler in BLDCM control system

作　　者：邓航见[1] 薛方正[1] 钟灶生[1] 

机构地区：[1]重庆大学智能自动化研究所,重庆400044

出　　处：《传感器与微系统》2011年第6期135-137,共3页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(60905053);"211工程"三期建设计划资助项目(S-09108)

摘　　要：为解决因电机电流尖峰脉冲对驱动器数字电部分造成干扰的问题,设计了基于线性光耦的电流隔离采样的无刷直流电机(BLDCM)控制系统。在逆变电路母线与地之间接入一个采样电阻器,利用采样电阻器将母线电流转变为电压,经线性光耦隔离放大电路放大作为电流环的反馈信号,再用软件修正算法补偿因传输造成的误差,从而既起到隔离作用又保证了采样精度。并在搭建的BLDCM控制系统中验证了其可行性。To address how to deal with the interference problems of digital part of the drive caused by motor current spike pulse.A BLDCM control system which based on linear optocoupler＇s current isolation sampling is designed.A sampling resistor is added between inverter circuit and ground to get voltage by current.By the amplify of linear optocoupler circuit,it is taken as the feedback signal of current loop.A software correction algorithm is designed for compensating errors caused by transmission.It has not only the function as isolation but also ensure sampling precision.The results of actual experiment prove the validity of this method.

关 键 词：线性光耦 无刷直流电机 控制系统 干扰 

分 类 号：TP242.2[自动化与计算机技术—检测技术与自动化装置]