摘要:提出一種新型三相軟開關(guān)(Soft—Switching)逆變電路拓?fù)?,它由全橋移相控制電路和交一交變頻電路組成。在詳細(xì)分析交一交變頻電路控制方法及其工作過程的基礎(chǔ)上,制作了一臺(tái)樣機(jī),實(shí)驗(yàn)結(jié)果驗(yàn)證了該電路拓?fù)涞目尚行院屠碚摲治龅恼_性。
關(guān)鍵詞:開關(guān);移相;控制;變頻器
[b][align=center]Research on a Novel Three·-phase Soft·-switching Inverter Circuit
SUN Xiang—dong,REN Bi—ying,ZHONG Yan—ru
(Xi University of Technology,Xi 0It 710048,China)[/align][/b]
Abstract:A novel three—phase soft—switching inverter circuit is roposed,which is composed of full—bridge phase—shifted control circuit and AC/AC inverter.The control method and working process of AC/AC inverter are analyzed in de—tail,a prototype unit is done on the basis of the above discussion,the experimental results shown that the circuit topology is feasible and the theoretical analysis is right.
Key words:switching;phase—shifted;control;inverter Foundation Project:Supported by National Science Foundation of Shaan Xi Province(No.2004E2 14) and Educa—tional Special Foundation of Shaan Xi Province(No.04JK1981
1 引 言
自從Divan教授提出諧振直流環(huán)節(jié)逆變電路拓?fù)湟院?,陸續(xù)出現(xiàn)了有源箝位諧振直流環(huán)節(jié)逆變器、并聯(lián)諧振直流環(huán)節(jié)逆變器及準(zhǔn)并聯(lián)諧振直流環(huán)節(jié)逆變器等電路。它們都是針對(duì)開關(guān)電壓應(yīng)力高和諧振電感損耗大等問題而設(shè)計(jì)的.但上述電路仍都有各自的不足之處。隨后又出現(xiàn)了諧振極逆變器、輔助二極管諧振極逆變器和輔助諧振極逆變器等。它們?cè)谌鄻虮鄣拿總€(gè)橋臂上都配有一套輔助諧振電路。使每一相極點(diǎn)電壓產(chǎn)生諧振,從而為開關(guān)器件創(chuàng)造零電壓開通條件。其缺點(diǎn)是控制相對(duì)復(fù)雜,軟開關(guān)(Soft—witching)條件有一定限制。
本文提出一種新型三相軟開關(guān)逆變電路拓?fù)?。該電路并不采用諧振/準(zhǔn)諧振電路來產(chǎn)生電壓/電流過零點(diǎn),而是利用全橋移相控制電路周期性輸出零電壓凹槽,為交一交變頻電路的開關(guān)器件創(chuàng)造零電壓開關(guān)(ZVS)條件。
[b][align=center]詳細(xì)內(nèi)容請(qǐng)點(diǎn)擊:
一種新型三相軟開關(guān)逆變電路研究[/align][/b]