中国电机工程学报2012，Vol.32Issue(30)：112-117,6.
无刷直流电动机低转矩脉动超前换相控制方法
An Advance Commutation Control Method for Low Torque Ripple of Brushless DC Motors
石坚 1李铁才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
- 折叠
摘要
Abstract
An improved variable DC bus voltage six-step control method of brushless DC motor (BLDCM) was presented It solved the current lag problem due to winding inductance, and improved the current ripple problem due to phase commutation. The new method was implemented by adding a small buffer zone in the connecting place of two steps. This buffer zone allowed the next step phase switching in before the present step was over, and let the present step phase continue working for a short time after entering next step. The centerline of the phase current could coincide with the centerline of the back EMF by determining the buffer zone's start position which could also be seen as an advance commutation angle. The decrease of the current ripple could be achieved by choosing a proper duty cycle in the buffer zone. It only requireed the load current to determine the advance commutation angle in this method, and applied to any speed operation once the angle was determined. The detailed theoretical derivation was given. The experimental results show that the current lag problem is solved, the current ripple is depressed and the work efficiency of BLDCM is improved.关键词
无刷直流电动机/超前换相/低转矩脉动/六拍控制Key words
brushless DC motor (BLDCM)/ advance commutation/ low torque ripple/ six-step control分类
信息技术与安全科学引用本文复制引用
石坚,李铁才..无刷直流电动机低转矩脉动超前换相控制方法[J].中国电机工程学报,2012,32(30):112-117,6.
