基于TL494的微型车载逆变器设计  

Design of mini vehicle inverter based on TL494

作　　者：闫亮[1] 许宜申[1] 陶智[1] 张鑫[2] 娄霞[1] 顾辉辉[1] 

机构地区：[1]苏州大学物理科学与技术学院,江苏苏州215006 [2]南京铁道职业技术学院电子电气工程系,江苏苏州215137

出　　处：《现代电子技术》2012年第15期164-166,共3页Modern Electronics Technique

基　　金：江苏省高等学校大学生实践创新训练计划资助项目(11cxsj015);苏州大学学生科研基金资助项目;2011年度太仓科技创新创业领军人才计划资助项目

摘　　要：针对汽车内部直流电源不能用于交流用电器的问题,设计了一款基于脉宽调制芯片TL494的微型车载逆变器。该逆变器采用DC-DC变换和DC-AC逆变两级结构,前级完成直流升压,后级选择脉宽调制(PWM)控制方式,将直流电压逆变为220V/50Hz的方波交流电。其中,DC-DC变换器先通过推挽逆变电路和高频变压器将12V变换为22V交变方波,再经快恢复二极管整流得到22V直流电。另外,该逆变器提供了一个标准USB接口,可以为具有USB接口的手机等设备充电。To solve the problem that DC power is not suitable for AC equipments within the vehicles, a mini vehicle in verter based on TL494 is presented in this paper, which changes direct current （DC） to alternating current （AC）. The pro- posed two-stage micro-inverter consists of DC-DC converter and DC-AC inverter, in which the former is used for boosting in- put DC voltage and the latter can convert the higher voltage to 220V/50Hz square wave in the pulse width modulation （PWM） mode. The DC-DC stage converts 12 V DC to 22 V AC square wave through the push-pull circuit and a high-frequency trans- former, and then the stable 22 V DC is obtained with the fast recovery rectified diodes. In addition, the micro-inverter pro- vides a standard USB interface with which the inverter can charge the electronic equipments such as cellphones.

关 键 词：车载逆变器 高频变压器 USB TL494 PWM 

分 类 号：TN911.734[电子电信—通信与信息系统]