一种无位置传感器BLDC零启动的纯硬件实现方法  

Pure hardware method for zero start-up of sensorless brushless direct current motor

作　　者：林潇[1] 潘双夏[1] 胡晓杭[1] 

机构地区：[1]浙江大学机械设计研究所,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第9期1591-1596,共6页Journal of Zhejiang University：Engineering Science

基　　金：浙江省重大科技攻关资助项目(NO.2006C11148)

摘　　要：为了在现有电机和控制器等产品的基础上实现低风险及低成本的产品升级换代,基于无刷无位置传感直流电机反电动势过零检测的原理,分析了三相反电动势端电压与中性点的关系,提出了一种可完全替换3路霍尔传感器的无刷无位置传感电机零启动的纯硬件方法,弥补了传统无传感控制策略运算要求高、成本提升大、可靠性不高、30°软件时延的缺点.经理论分析和大量实验验证,输出的模拟换相逻辑信号与原系统中霍尔信号相一致,零启动具有大扭矩、无抖动、平滑、提速快的特性,可以完全取代霍尔传感器.On the base of existing motors and controllers, products upgrading with low risk and low cost was considered. Based on the principle of back electromotive force zero-crossing testing in sensorless brushless direct current （DC） motor, the relationship between the floating phase terminal end voltage and midpoint voltage in DC link of three phases＇ back electromotive start-up of sensorless b sors was proposed. Th rushless direct current （BLDC） motor whi force was analyzed. A method for zero ch can totally replace three position sene proposed method improves the original sensorless control strategies which have disadvantages of time complexity, high cost being unstable, and 30°software time delay. Theoretical analysis and experimental results show that the proposed method can achieve the same simulative logic signal of switching phase as the original position signal; especially under the condition of zero start-up, it has the characteristics of great torque, smoothness and good acceleration, and it is a good substitute for position sensor.

关 键 词：无刷直流电机(BLDC) 无位置传感器 反电动势 过零检测 

分 类 号：TM33[电气工程—电机]