單極性移相控制高頻脈沖交流環(huán)節(jié)逆變器研究

摘要：本文深入分析研究了高頻脈沖交流環(huán)節(jié)逆變器穩(wěn)態(tài)原理特性與單極性移相控制策略。采用狀態(tài)空間平均法建立了逆變器平均模型，獲得了輸出電壓、濾波電感電流、共同導(dǎo)通時間、單極性SPWM波占空比等關(guān)鍵電路參數(shù)的設(shè)計準(zhǔn)則和逆變器的外特性曲線。原理試驗(yàn)結(jié)果證實(shí)了理論分析的正確性。這類逆變器具有電路拓?fù)浜啙�、兩級功率變換（DC/HFAC/LFAC）、雙向功率流、周波變換器實(shí)現(xiàn)了ZVS換流、單極性SPWM波等優(yōu)點(diǎn)，包括全橋全波式、全橋橋式兩種電路，前者適用于低壓輸出逆變場合，后者適用于高壓輸出逆變場合。 敘詞：單極性移相控制 高頻脈沖交流環(huán)節(jié) 逆變器 周波變換器 軟換流 Abstract：The steady principle of inverter with high frequency pulse AC link and uni-polarity phase shifting control strategy are deeply investigated. The inverter's average model by using the state-space averaging approach is presented, the design criterion of key circuit parameters such as output voltage, filtering inductance, common conduction time,uni-polarity SPWM waveform's duty cycle etc are given. The theoretical analysis is verified by the test results .This kind of inverter has the advantages such as simple topology ,two-stage power conversion(DC/HFAC/LFAC), bi-directional power flow, soft commutation of cycloconverter ,uni-polarity SPWM waveform etc. It has a full bridge-full wave mode topology which is suit for low output voltage and a full bridge-full bridge mode topology which is suit for high output voltage. Keyword：Uni-polarity Phase shifting Control，High frequency Pulse AC Link，Inverter，cycloconverter，soft commutation