一种同步整流大功率降压转换器的设计  

A Design of High-power Buck Converter Based on Synchronous Rectification

作　　者：王立萍[1,2] 周锎[3] 王俊[1] 耿卫东[1] 

机构地区：[1]南开大学光电子薄膜器件与技术研究所,天津300071 [2]解放军汽车管理学院训练部,安徽蚌埠233011 [3]天津光电通信技术有限公司技术中心,天津300211

出　　处：《南开大学学报（自然科学版）》2012年第5期32-36,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：天津市重点基金(11JCZDJC22900)

摘　　要：采用同步整流方式,设计了一种5 kW PWM控制的DC-DC降压电路.采用Saber软件对电路进行了仿真,仿真结果表明,该电路输入电压在60～90 V变化,输出电流平均值达105 A时,能够稳定输出48 V电压.Synchronous rectifier lower voltage circuit DC/DC converter uses the MOSFET which has smaller on-resistance and faster speed instead of the freewheel diode in the freewheeling circuit. The free-wheeling loss is reduced. The efficienty of DC-DC converter is im- proved and the problem of dead zone voltage which is caused by the Schottky barrier voltage is eliminated. A 5 kW buck circuit which is controlled by PWM using the synchronous rectifica- tion is designed. Saber is an accurate and efficient circuit simulation software. Using saber to simulate the design, the circuit＇s output 48 V steadily and the average value of the input current achieves 105 A is shown in the results when the value of the input voltage changes from 60 to 90 V.

关 键 词：DC DC降压转换电路 开关电源 SABER 同步整流 

分 类 号：TM615[电气工程—电力系统及自动化]