稳态强磁场中直流有源滤波器连接电感的计算

摘要

In view of the disadvantages of the DC active filter in other countries, this paper presents the shunt PWM active filter scheme by combining the advantages of the PWM technique and the shunt type. This paper analyzes the structure and principle of shunt PWM active filter, the parameter of the connection inductance and the maximum output current under the discontinue current mode, meanwhile the control mode of the DC active filter is also analyzed.Based on the proposecl scheme, a experimental prototype is developed, the results show the filter has good filter effect.%针对国外稳态强磁场实验装置有源滤波器的不足,结合PWM技术及并联型的优点,采用并联型PWM有源滤波在直流侧的滤波方案.介绍了并联型PWM有源滤波器的结构及其工作原理,对其断续电流工作模式下的电感参数及最大输出电流进行分析设计,同时分析了其控制模型.最后研制样机对所提方案进行实验验证,实验结果表明,该滤波器具有良好的滤波效果,为稳态强磁场实验装置电源系统的有源滤波提供了参考依据.