摘要
为解决5 k W以上直流稳压电源前级PFC电路的动态响应与电磁干扰问题,同时减少系统损耗,文中分析了基于单周期控制原理的无桥PFC电路模型,针对无桥结构严重的电磁干扰问题设计了数字有源EMI滤波器,在理论基础上进行仿真分析并设计了实验样机。实验及仿真结果证明,该数字有源EMI滤波器能较好地解决无桥结构的EMI问题,同时也说明了单周期算法对于无桥结构的适用性。
In order to solve the problem of electromagnetic interference and dynamic response of 5 KW DC power supply PFC circuit, and reduce the loss of the system, analyzes the principle of one cycle control model based on bridgeless PFC circuit, and serious electromagnetic interference problem of bridgeless structure, design a kind of dig- ital active EMI filter, finally design an experimental prototype based on the theory of simulation. The experimental and simulation results show that this digital active EMI filter can solve the EMI problem of the bridgeless structure, and it also shows the applicability of the one cycle control algorithm to the bridgeless structure.
出处
《电子科技》
2017年第8期134-137,141,共5页
Electronic Science and Technology
关键词
无桥电源
功率因数校正
EMI抑制
单周期控制
no bridge power supply
power factor eorrection
EMI suppression
one cycle control
