基于LM3S-811单相逆变器设计  

Design of uniphase inverter based on LM3S-811

作　　者：王文涛[1] 鲁金钿 彭瑞[1] 

机构地区：[1]中南民族大学计算机科学学院,湖北武汉430074

出　　处：《现代电子技术》2014年第15期110-112,116,共4页Modern Electronics Technique

摘　　要：在此实现了基于LM3S-811的高频逆变器,整个系统包括辅助电源、推挽升压、全桥逆变、SPWM产生、过流保护以及低通滤波等模块。DC 12 V低压直流经过挽推升压转换为高频方波,再经过变压器升压和整流、滤波转化为DC 300 V。推挽模块用SG3525驱动MOSFET得到高压直流电,再经过LM3S-811产生SPWM波驱动全桥逆模块并结合低通滤波、输出过流保护得到工频AC 220 V,输出功率可达240 W。该系统具有体积小、输出稳定等优点。The high frequency inverter based on LM3S-811 was realized with the design. The whole system is composed of auxiliary power supply,push-pull booster,full-bridge inverter,SPWM wave generator,over-current protection module,low pass filtering module,etc. 12 V DC is converted into a high frequency square wave by push-pull booster,and then is converted into 300 V DC by transformer boosting,rectification,filtering. SG3525 is used in the push-pull module to drive MOSFET for getting high voltage DC. LM3S-811 is used to produce SPWM wave for driving the full-bridge inversion module,and is com-bined with low pass filtering and output over-current protection to get 220 V AC power frequency. Its output power is up to 240 W. This system has the advantages of small volume and stable output.

关 键 词：逆变器 LM3S-811 SPWM 挽推升压 全桥逆变 过流保护 

分 类 号：TN710-34[电子电信—电路与系统]