摘要
在能量回馈制动原理的基础上,详细分析了无刷直流电机的半桥斩波回馈制动和全桥斩波回馈制动。针对半桥斩波非导通相续流的弊端和全桥斩波存在临界转速的缺点,提出采用全桥斩波和半桥斩波相结合的混合回馈制动控制新方法。该方法在临界转速以上采用全桥斩波回馈制动,以避免非导通相的续流,减小转矩脉动,实现平稳制动;在临界转速以下采用半桥斩波回馈制动,以减小能量损失,达到高效驱动的目的。仿真和实验结果表明,在制动中采用该方法既能高效回馈能量,又能实现平稳制动。
This paper analyzed half bridge pulse width modulation and whole bridge pulse width modulation of brushless DC motor respectively based on regenerative braking principle. Combined with whole bridge modulation and half bridge modulation, a novel hybrid regenerative braking control method was proposed to solve the problems of freewheeling in the inactive phase and critical speed. Whole bridge modulation was used above the critical speed to avoid the freewheeling and eliminate the torque ripple. While half bridge modulation was adopted below the critical speed, so the power losses reduced and the efficiency of the drive system improved. Experimental results prove that the new method in braking control can not only improve the efficiency of energy feedback but also smooth the braking process.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第6期74-80,共7页
Transactions of China Electrotechnical Society
基金
航空科学基金资助项目(2013ZD52055)
关键词
无刷直流电机
半桥斩波
全桥斩波
回馈制动
Brushless DC motor, half bridge modulation, whole bridge modulation, regenerative braking
