船电技术
船電技術
선전기술
2011年
9期
1-5,54
,共6页
开关损耗分析%矩阵变换器%双向开关%调制策略%仿真
開關損耗分析%矩陣變換器%雙嚮開關%調製策略%倣真
개관손모분석%구진변환기%쌍향개관%조제책략%방진
power loss analysis%matrix converter%bi-directional switches%modulation strategies%simulation
由于矩阵变换器的拓扑结构和传统的电压源逆变器不同,各个IGBT模块的c-e极电压和电流分配都是在变化的,各管的损耗也同时在变化,VSI的开关损耗分析不能适用于矩阵变换器。本文在电压型换流法的各个开关模态的基础上,分析了每个开关过程的传导损耗、开通损耗和关断损耗,通过计算机累加仿真求得了MC总的开关损耗。仿真可知传导损耗为与输出频率有关的周期函数;不同的调制方法、开关频率对开通和关断损耗的影响很大,对传导损耗几乎没有影响;只有少数几种调制方法可以得到损耗的解析解,大多数方法需要仿真计算求开关损耗。
由于矩陣變換器的拓撲結構和傳統的電壓源逆變器不同,各箇IGBT模塊的c-e極電壓和電流分配都是在變化的,各管的損耗也同時在變化,VSI的開關損耗分析不能適用于矩陣變換器。本文在電壓型換流法的各箇開關模態的基礎上,分析瞭每箇開關過程的傳導損耗、開通損耗和關斷損耗,通過計算機纍加倣真求得瞭MC總的開關損耗。倣真可知傳導損耗為與輸齣頻率有關的週期函數;不同的調製方法、開關頻率對開通和關斷損耗的影響很大,對傳導損耗幾乎沒有影響;隻有少數幾種調製方法可以得到損耗的解析解,大多數方法需要倣真計算求開關損耗。
유우구진변환기적탁복결구화전통적전압원역변기불동,각개IGBT모괴적c-e겁전압화전류분배도시재변화적,각관적손모야동시재변화,VSI적개관손모분석불능괄용우구진변환기。본문재전압형환류법적각개개관모태적기출상,분석료매개개관과정적전도손모、개통손모화관단손모,통과계산궤루가방진구득료MC총적개관손모。방진가지전도손모위여수출빈솔유관적주기함수;불동적조제방법、개관빈솔대개통화관단손모적영향흔대,대전도손모궤호몰유영향;지유소수궤충조제방법가이득도손모적해석해,대다수방법수요방진계산구개관손모。
Power loss analysis on bi-directional switches is one of basic steps for evaluation of the reliability of matrix converter（MC）.Since power topologies and switching rules of MC are quite different from voltage source inverter（VSI）,loss analysis methods used for power switches of VSI topology cannot be applied to MC.The collector-emitter voltage Vce of IGBT modules are not constant and current distribution in each power device changes at each instant switching.The conduction loss,turn-on loss and turn-off loss is simulated by the computer based on semi natural two steps commutation strategy.It can be obtained that the conduction loss is a periodic function concerned with output frequency,the different modulation strategies and carrier frequency can influence the turn-on loss and turn-off loss not to the conduction loss,only several modulation strategies can get analytic solution of switch loss,most modulation strategies need simulation.
