Position-Sensorless Control for Brushless DC Motor of Electric Vehicle

曹建波; 曹秉刚; 王斌; 许鹏

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Position-Sensorless Control for Brushless DC Motor of Electric Vehicle

更新时间：2025-12-08

- Position-Sensorless Control for Brushless DC Motor of Electric Vehicle
- Vol. 42, Issue 5, Pages: 597-601(2008)
- 作者机构：
  
  西安交通大学电动车研究开发中心,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP301
- Online First：10 May 2008，
  
  Published：2008
- 稿件说明：
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曹建波, 曹秉刚, 王斌, et al. Position-Sensorless Control for Brushless DC Motor of Electric Vehicle[J]. 2008, 42(5): 597-601.
DOI：

曹建波, 曹秉刚, 王斌, et al. Position-Sensorless Control for Brushless DC Motor of Electric Vehicle[J]. 2008, 42(5): 597-601. DOI：

摘要

通过分析电动车用无刷直流电机换相原理及间接位置检测原理

设计了一种基于反电动势法的无位置传感器电动车控制系统

为消除电机中性点电压和阻容滤波对反电动势检测电路的影响

该系统对传统反电动势法进行了改进

将采样电路的参考点与电池负极断开

并通过软件设计进行了反电动势相移补偿.实验结果表明

改进后的无位置传感器控制系统消除了电机中性点电压对反电动势检测电路的影响

不论电机运行在低速还是高速状态

都可准确地检测反电动势的过0点

在进行了相移补偿之后

可成功实现无位置换相控制

从而提高了电动车控制系统的可靠性和稳定性.

Abstract

By analyzing the principle of position-sensorless control for brushless DC motor(BLDCM)

a control system by means of back-electromotive force(back-EMF)method is designed for electric vehicle(EV). To eliminate the influence on back-EMF detection circuit from motor neutral point and RC filter

the reference point of detection circuit is disconnected from battery cathode

and the phase shifting of back-EMF is compensated by software scheme. The experimental results show that the control system of position-sensorless EV enables to eliminate the influence from motor neutral point to realize zero-crossing detection accurately whenever BLDCM runs at high or low speed. The phase shifting once is compensated

the position-sensorless commutation control is completed to ensure the system reliability and stability.

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references

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