摘要: 用多傳輸線理論分析了定子繞組內(nèi)的電壓波傳播過程,提出了計算變頻牽引電機定子繞組暫態(tài)電壓分布的等效電路。用有限元軟件ANSYS 計算等效電路分布參數(shù)值的結(jié)果表明末端線圈首匝對地電壓、匝間電壓最大。 關(guān)鍵詞: 牽引電機; 傳輸線理論; 高頻效應(yīng); 電壓分布 [b][align=center]Calculation of Transient Voltage Distribution in Windings of Inverter2fed Traction Motor TON G Laisheng1 , WEN Fengxiang2 , WU Guangning1 , L IN Tongguang1 , ZHAN G Guoqin1 （1. College of Elect rical Engineering , Wout hwest J iaotong Univer sity , Chengdu 610031 , China ; 2. Chengdu Design & Research Instit ute for Hydroelect ric Project s , Chengdu 610072 , China）[/align][/b] Abstract : An equivalent circuit is developed based on t ransmission line theory taking account on high2f requency effect s. The parameters of equivalent circuit are calculated by the finite element analysis ANSYS sof tware. Then t ransient voltage dist ribution in windings of inverter2fed t raction motor is alculated by the equivalent circuit . The results show that the maximum voltage across the first turn of end coil and turn to ground voltages of turns are not different . Key words : t raction motor ; t ransmission line theory ; high2f requency effect ; voltage dist ribution 0 　引　言 變頻調(diào)速系統(tǒng)因自身特點得到廣泛應(yīng)用,但應(yīng)用過程中出現(xiàn)變頻電機絕緣過早損壞的情況[126 ] 。高速機車牽引逆變器廣泛采用IGB T 等高速開關(guān)器件,輸出電壓是具有陡上升沿的連續(xù)脈沖,它在變頻牽引電機定子繞組中的不均勻分布是造成繞組絕緣過早損壞的主要因素之一[ 7211 ] 。但其具體分布還不清楚,故需研究其暫態(tài)電壓分布情況,為變頻牽引電機設(shè)計提供必要的理論依據(jù)以防止電機定子絕緣的過早損壞。本文首先根據(jù)多傳輸線理論分析了電流在繞組中的傳播過程,在考慮定子繞組高頻損耗的情況下,提出了用于計算變頻牽引電機定子繞組暫態(tài)電壓分布的等效電路。用有限元分析軟件AN2SYS 計算了等效電路分布參數(shù)值,并在此基礎(chǔ)上用MA TLAB 軟件計算出繞組暫態(tài)電壓分布。 [b][align=center]詳細內(nèi)容請點擊下載 變頻牽引電機定子繞組暫態(tài)電壓分布的計算[/align][/b]