中国电机工程学报Issue(12)：1905-1911,7.DOI:10.13334/j.0258-8013.pcsee.2014.12.010
小电感无刷直流电动机三相H桥无位置传感器控制方法
A Sensorless Control Method of Small Inductance Brushless DC Motors With Three-phase H-bridge Connection
石坚 1李铁才 2王孝伟 1安芳1
作者信息
- 1. 哈尔滨工业大学深圳研究生院，广东省深圳市 518055
- 2. 深圳航天科技创新研究院，广东省深圳市 518057
- 折叠
摘要
Abstract
The traditional six-step control method of the brushless DC motor (BLDCM) adopts Y-connection windings to make two conducting phases work in series; the sensorless control of this structure is implemented through detecting the zero-cross point of the non-conducting phase back electromotive force (EMF). Connection in series makes each phase excited with half the potential of bus voltage, and distraction of the neutral point reduces the accuracy of the rotor position signal. To improve these two aspects, the three-phase H-bridge structure has been adopted to BLDCM in this paper. The new structure makes two conducting phases work in parallel; meanwhile the non-conducting phase is cut off from the circuit for back EMF zero-cross detecting. Parallel connection makes each phase excited with full potential of bus voltage, and the non-conducting phase totally switches out from the circuit, which makes the rotor position signal accurate. The theoretical derivation and analysis of the presented method are given. The experimental results of a small inductance prototype with 4 pole pairs shows that the presented sensorless control method could be working well at the speed of 20000r/min.关键词
无刷直流电动机/六拍控制/三相H桥/无位置传感器/小电感Key words
brushless DC motor (BLDCM)/six-step control/three-phase H-bridge/sensorless control/small inductance分类
信息技术与安全科学引用本文复制引用
石坚,李铁才,王孝伟,安芳..小电感无刷直流电动机三相H桥无位置传感器控制方法[J].中国电机工程学报,2014,(12):1905-1911,7.
