低压大电流开关电源的整流电路和带隔离的DC-DC变流电路  

Rectifier Circuit and Isolated DC-DC Converter Circuit of Low Voltage and High Current Switching Power Supply

作　　者：张兆凤 ZHANG Zhaofeng(Gansu Iron and Steel Vocational and Technical College,Jiayuguan 735100,China)

机构地区：[1]甘肃钢铁职业技术学院,甘肃嘉峪关735100

出　　处：《通信电源技术》2020年第24期20-22,共3页Telecom Power Technology

摘　　要：分析低压大电流开关电源,假定用单相工频交流电源经过若干个电能变换环节转变成低压直流电源对蓄电池(220 V直流,充电电流10 A)充电,涉及的单元包括工频整流电路单元和带隔离的直流-直流变流单元。其中工频整流电路单元将工频交流电流变换为直流电流,带隔离的直流-直流变流单元包括高频逆变电路单元,将直流电流变为高频交流电流,然后用变压器实现电气隔离并降压,从而将稍高压高频交流电流变换为低电压的高频电流,最后采用高频整流单元将高频电流变换为脉动的直流电流。It is assumed that the single-phase AC power supply is converted into A low-voltage DC power supply to charge the battery(220 V DC and the charging current is 10 A)through several energy conversion links.The units involved include the power frequency rectifier circuit unit and the isolated DC-DC converter unit.The rectifier circuit unit will power frequency ac power frequency current transformation for DC current,with isolated DC-DC converter unit including high frequency inverter circuit unit,DC current into high frequency alternating current,and then use transformer to realize electrical isolation and step-down,to a high voltage high frequency alternating current transform for low voltage high frequency current.Finally,the high frequency current is converted to pulsating DC current by high frequency rectifier unit.

关 键 词：开关电源 工频整流 直流-直流变流单元 滤波器 

分 类 号：TM4[电气工程—电器]