濟南能華介紹逆變電源設計報告

作者：www.www.pcmenaggio.com   發(fā)布日期：2014-08-13 01:13   信息來(lái)源：http://www.www.pcmenaggio.com

實(shí)現一種基于Cortex M3的高頻鏈逆變電源。系統由輸入欠壓保護、推挽升壓、全橋逆變、SPWM波產(chǎn)生、低通濾波、輸出過(guò)流保護、輔助電源等電路組成。12V的直流電通過(guò)推挽式變換逆變?yōu)楦哳l方波，經(jīng)高頻變壓器升壓，再整流濾波得到一個(gè)穩定的約320V直流電壓。前級DC-DC變換采用SG3525驅動(dòng)MOSFET得到高壓直流電，然后通過(guò)M3產(chǎn)生的SPWM驅動(dòng)全橋電路，再經(jīng)低通濾波得到220V的工頻正弦交流電。采用反激式開(kāi)關(guān)電源升壓再經(jīng)穩壓芯片穩壓供電很好的實(shí)現隔離，并且具有輸入欠壓保護和輸出過(guò)流保護，輸出功率可達100W。該電源體積小、效率高、輸出電壓穩定，非常適用于車(chē)載逆變器。

Abstract This design implements a Cortex M3 based on the high-frequency link inverter power supply.System consists of input undervoltage protection, push-pull boost, full-bridge inverter, SPWM wave generator, low pass filtering, output over-current protection, auxiliary power and other circuit.12V direct current through the push-pull inverter is a high frequency square wave transform, the high-frequency step-up transformer, then rectified and filtered to get a stable DC voltage of about 320V.Former level DC-DC conversion by using SG3525 drive MOSFET high voltage DC and then generate the SPWM drive M3 full bridge circuit, and then low-pass filter obtained by the frequency sinusoidal AC 220V.With a flyback switching power supply step-up regulator chip re-powering through the realization of good isolation, and with input voltage protection and output over-current protection, output power up to 100W.The power, small size, high efficiency, output voltage stability, ideal for automotive inverter.