摘要
由于无刷直流电机存在转矩脉动,从而会导致电机运行的不稳定。首先分析了无刷直流电机的换相转矩脉动产生原理,然后对电机的停机过程进行了分析,提出当停机过程中存在换相时,由于转矩脉动的产生会对电机的停机精度产生影响。针对这个问题,分别采用传统的重叠换相和提出的动态换相技术进行研究。通过详细的理论分析和实验结果验证,发现当在停机过程中采用动态换相技术时,即使发生换相过程也能保持直流母线电流的平滑性,达到抑制转矩脉动,保证停机精度的效果。
Brushless DC motor（BLDCM） has the question of torque ripple and it will influence the motor＇s running stability. The theory of commutation torque ripple of BLDCM was analyzed firstly. After the study of the stop process of BLDCM, it proposed that the motor＇s stop precision will be affected when commutation oc- curs in the stop interval. Classical overlapping commutation and novel dynamic commutation technique were both used to solve this question separated. Through theoretical analysis and the experimental results, it found that the bus current was smooth at any time when dynamic commutation technique was used. So the torque ripple was decreased and the stop precision was improved obviously.
出处
《电气传动》
北大核心
2009年第1期23-26,共4页
Electric Drive
关键词
动态换相
重叠换相
无刷直流电机
换相转矩脉动
停机精度
dynamic commutation
overlapping commutation
brushless DC motor（BLDCM）
commutation torque ripple
stop precision
