摘要
为了消除电机谐波转矩,驱动系统常采用定子电流波形优化控制策略。本文通过对传统滞环电流控制器的分析,结合电压空间矢量调制方式,提出一种改进的滞环电流控制方法。该方法将电流滞环比较的结果和电压矢量在每个桥臂的周期值结合起来,然后根据各个变量的隶属度函数来确定电流滞环系数的模糊逻辑规则。试验结果表明,改进的电流控制方法不仅克服了电流滞环控制器开关频率不固定、输出PWM电压波形不规则等缺点,且明显提高了驱动系统的性能。
In order to eliminate the motor harmonic torque, the drive system always adopts stator current waveform optimizing control strategy. This paper presents a sort of improved hysteresis current control method through analyzing the traditional hysteresis current controller and combining voltage space vector modulate method. This method integrates the results of hysteresis current comparison result and the each arm period of voltage space vector. Then the fuzzy logical rules of current hysteresis coefficient are confirmed by the membership function of each variable. The experimental result indicates that the improved method not only overcomes the disadvantages of uncontrolled switch frequency and irregular output PWM voltage, but also obviously enhances the performance of the whole drive system.
出处
《电工技术学报》
EI
CSCD
北大核心
2008年第4期48-52,共5页
Transactions of China Electrotechnical Society
基金
国家科技攻关计划资助项目(2002BA315A-6)
关键词
定子电流
滞环电流控制器
电压空间矢量调制
模糊逻辑
Stator current, hysteresis current controller, voltage space vector modulated, fuzzylogic
