【正文】 iculty, and introduc ed the research switch ullage small, frequency higher soft switch type arc welding inverter, and emphasizes the phase shift control series resonant zero voltage zero current soft switch the w hole bridge of the inverter principle, characteristic and it how to use high frequency transformer leakage are ahead of the arms of the bridge realize zero open and use the dc voltage let realize the arms of the zero current lag bridge turned off, in addition, also with soft switch technology characteristics are analyze d and discussed. Phase shift inverter circuits of the w hole bridge circuit of the soft switch technology and PWM control technology in bination with, large scale realize PWM control, and in the power of the device during the mutation realize power co mponents zero voltage soft switch technology, and to reduce the switch loss, reduce the effect of the interference caused by miller phenomenon, and the system the bulk and weight be reduced power ponents are under stress switch is small, have a lot of a dvantages. Contrast analysis shows that, the soft switch type than the hard switch type has more advantages and more is worth popularizing. Ke yword： Hard switching type inverter。 Zero voltage zero current。 Phas e shift control of work 目錄 i 目 錄 第 1 章 緒論 .....................................................................................................................1 第 2 章 軟開關(guān)技術(shù)基礎(chǔ) .................................................................................................3 引言 .....................................................................................................................3 PWM 脈寬調(diào)制原理 ............................................................................................3 開關(guān)與損耗 .........................................................................................................4 軟開關(guān)發(fā)展的三階段 ...............................................................................4 軟開關(guān)損耗 ................................................................................................4 本章小結(jié) ....................................................................................................................6 第 3章 軟開關(guān)的分類 .....................................................................................................7 軟開關(guān)型逆變主電路 ..........................................................................................7 基本的軟開關(guān)逆變主電路介紹和了解 .............................................................7 零電流開關(guān)（ ZCS）諧振逆變主電路 ....................................................7 零電壓開關(guān)（ ZVS）諧振逆變主電路 ....................................................7 多諧振（ MRC）逆變主電路 ...................................................................8 串聯(lián)諧振逆變主電路 ................................................................................8 并聯(lián)諧振逆變主電路 ................................................................................9 E 類逆變主電路 ........................................................................................9 直流母線諧振逆變主電路 .....................................................................10 相移控制的全橋逆變主電路 .................................................................10 本章小結(jié) ..................................................................................................................12 第 4章 零電壓零電流 PWM 移相控制 ...........................................................................13 軟開關(guān)型全橋逆變電路的拓撲結(jié)構(gòu) ................................................................13 單端軟開關(guān)型逆變主電路 ......................................................................13 軟開關(guān)型全橋逆變主電路 ......................................................................13 相移控制電路及其新發(fā)展 ...............................................................................16 用飽和電抗器減少其占空比丟失的移相控制電路 .............................16 用雙電抗器整流的相移控制電路 .........................................................17 用輔助電路拓寬軟開關(guān)范圍的移相控制逆變主電路 .........................17 相移控制的零電壓、零電流開關(guān)電路 ..................................................18 相移控制的串聯(lián)諧振全橋逆變主電路 .................................................19 本章小結(jié) ..................................................................................................................20 目錄 ii 第 5 章 軟開關(guān)逆變器在焊機中的應(yīng)用 .......................................................................21 軟開關(guān)逆變器的主電路 ....................................................................................21 降壓整流電路 ..........................................................................................21 軟開關(guān)逆變電路 .....................................................................................22 控制電路 ...........................................................................................................26 本章小結(jié) ..................................................................................................................27 第 6 章 軟開關(guān)的控制電路 ...........................................................................................28 芯片 UC3875.....................................................................................................28 工作電源 .................................................................................................28 基準電源 .................................................................................................29 震蕩器 .....................................................................................................29 鋸齒波 .....................................................................................................29 誤差放大器和軟啟動 .............................................................................29 移相控制信號發(fā)生電路 .........................................................................30 過流保護 .................................................................................................