现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
15期
110-112,116
,共4页
逆变器%LM3S-811%SPWM%挽推升压%全桥逆变%过流保护
逆變器%LM3S-811%SPWM%輓推升壓%全橋逆變%過流保護
역변기%LM3S-811%SPWM%만추승압%전교역변%과류보호
inverter%LM3S-811%SPWM%push-pull boosting%full bridge inversion%over-current protection
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。
在此實現瞭基于LM3S-811的高頻逆變器，整箇繫統包括輔助電源、推輓升壓、全橋逆變、SPWM產生、過流保護以及低通濾波等模塊。DC 12 V低壓直流經過輓推升壓轉換為高頻方波，再經過變壓器升壓和整流、濾波轉化為DC 300 V。推輓模塊用SG3525驅動MOSFET得到高壓直流電，再經過LM3S-811產生SPWM波驅動全橋逆模塊併結閤低通濾波、輸齣過流保護得到工頻AC 220 V，輸齣功率可達240 W。該繫統具有體積小、輸齣穩定等優點。
재차실현료기우LM3S-811적고빈역변기，정개계통포괄보조전원、추만승압、전교역변、SPWM산생、과류보호이급저통려파등모괴。DC 12 V저압직류경과만추승압전환위고빈방파，재경과변압기승압화정류、려파전화위DC 300 V。추만모괴용SG3525구동MOSFET득도고압직류전，재경과LM3S-811산생SPWM파구동전교역모괴병결합저통려파、수출과류보호득도공빈AC 220 V，수출공솔가체240 W。해계통구유체적소、수출은정등우점。
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.
