基于可控谐振电感技术的移相全桥变换器  

Phase Shifted Full Bridge Converter Based on Controllable Resonant Inductance Technology

作　　者：姬军鹏[1] 胡雪利[1] 华志广[1] 曾光[1] 陈桂涛[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《电气传动》2015年第7期31-37,共7页Electric Drive

基　　金：陕西省重点学科建设专项基金资助项目(105-5X1201)

摘　　要：提出一种应用于移相全桥变换器的可控谐振电感技术(CRI),仅在主电路拓扑结构上增加了一个磁芯,增加了零电压软开关的实现范围,大大提高了轻载状况下的电源效率。在满载或重载工况下,CRI使得寄生谐振电感值和占空比丢失变小,减小了软开关对负载电流的依赖性。同时大大减小了变换器传导电磁干扰(EMI)的发射。建立了一台20 k Hz,30 k W的带有CRI的高频逆变弧焊电源的仿真模型,并搭建了实物样机,仿真和样机实验结果验证了设计方法的可行性。Controllable resonant inductance （CRI） technology used in phase-shifted full-bridge converter was presented. By using CRI which only added a magnetic core in the main circuit topology, the range of zero voltage soft switching operation of converter was increased, and its efficiency when light load was significantly improved. Under heavy or full load, parasitic inductance and duty cycle loss were decreased, and the dependency of soft switching operation on the load current was also decreased. Also, conducted EMI in a broad frequency range was improved. A prototype of high-frequently inverter are welding power supply was established by using CRI operating at 20 kHz switching frequency with 30 kW output power. The results of simulation and test verify that the proposed method is feasible.

关 键 词：移相全桥 可控谐振电感 电磁干扰 软开关 效率 

分 类 号：TM46[电气工程—电器]