一种减小无刷直流电机换相转矩脉调制方法

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摘要无刷直流电机具有能量密度大、转矩大等优点,但是其结构特点和传统的换相方法导致其存在换相转矩脉动的问题。为了减小换相转矩脉动,采用一种基于PWM_ON的新型换相控制方法。在非换相区,采用PWM_ON调制;在换相区,采用三相绕组同时调制,并计算每一相调制占空比,使关断相电流下降速率与导通相电流上升速率相等。所采用的方法计算简单,能明显地减小换相转矩脉动。给出了换相区间关断相和导通相占空比的计算过程,得出了在换相区间关断相和导通相占空比的关系,通过实验验证了所采用方法的正确性和有效性。

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	王大方
	卜德明
	朱成
	周传炜
	杨博文

关键词 ：无刷直流电机, 换相转矩脉动, PWM_ON, 同时调制

Abstract：Brushless DC motors have great power density and torque output. However, they have the problem of commutation torque ripple due to structural characteristics and conventional commutation method. In order to decrease the commutation torque ripple, a new commutation control method based on PWM_ON is applied in this paper. In non-commutation interval, the PWM_ON modulation is used; in commutation interval, the three-phase corporative modulation is used, and the duty cycle of each phase is calculated to keep the current slope of off-going phase and on-going phase equal. The method is simple and decreases the commutation torque ripple obviously. The process to calculate the duty cycle of off-going phase and on-going phase in commutation interval is presented, and their relationship is proposed. The experimental results show the correctness and validity of the commutation control method.

Key words： Brushless DC motors commutation torque ripple PWM_ON corporative modulation

收稿日期: 2013-05-07 出版日期: 2014-11-05

PACS:

TM315

基金资助:航天支撑技术基金（2013-HT-HGD09）,山东省优秀中青年科学家科研奖励基金（BS2012NJ001）,中央高校基本科研业务费专项资金（HIT; NSRIF.2013123）和电动车辆国家工程实验室开放基金（NELEV-2013-004）资助项目

作者简介: 王大方男,1978年生,博士,副教授,硕士生导师,研究方向为新能源车辆与电驱动技术。卜德明男,1989年生,硕士研究生,研究方向为电机伺服控制技术、电动车驱动系统控制技术。

引用本文:

王大方, 卜德明, 朱成, 周传炜, 杨博文. 一种减小无刷直流电机换相转矩脉调制方法[J]. 电工技术学报, 2014, 29(5): 160-166. Wang Dafang, Bu Deming, Zhu Cheng, Zhou Chuanwei, Yang Bowen. A Modulation Method to Decrease Commutation Torque Ripple of Brushless DC Motors. Transactions of China Electrotechnical Society, 2014, 29(5): 160-166.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I5/160

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