有源箝位软开关充电机的设计与仿真研究

传统硬开关电路影响效率和可靠性的同时,对其他设备的电磁干扰也较大,软开关则可解决上述问题。本文提出了一种基于辅助谐振换流的新型ZVT-PWM变换器,即通过采用简单的有源辅助谐振网络实现了主、辅开关管的软开关,主开关管实现了零电压开通,开关管电流电压应力小。利用这种软开关技术研制了一台用于为风力发电蓄电池充电的充电机,给出了充电机的控制系统框图,简单介绍了充电机的工作原理。最后利用Pspice给出了运行波形和仿真结果。

Design and simulation of soft switching charger with active clamp technique

The traditional hard switching circuit affects the efficiency and reliability,and also has big electromagnetic interference to other devices,soft switching circuit can solve those questions.A novel ZVS-PWM boost converter with active auxiliary resonant commutation is presented in the pape.Soft switching of the main switch and auxiliary switching can be achieved by using active auxiliary resonant network.The proposed converter has such advantages as zero—voltage turn-on for the main switch without increasing voltage.By use of this soft switching technique a prototype of charger for the wind power battery is developed, the block diagram of the charger controller is presented and the principle of the charger is described briefly.