| | uqpxrpu| , {u~y , rxp~~u y{yrp~~z ~uzp|~z {z (active NPC) . Py } q}{y tryspu| . P|~p xpyp ypuz uy . E {|p yqr ~u ru|yyrpu ~}y~p|~ }~ ur|u u} yx}u~u~y rt~ ~pwu~yz {p{ : y{yrp~~z ~uzp|~z {z y}uu rx}w~ r{|u~y tr ~yw~y {|uz) , yq|ywpyu }u yq|ywu~~s { {pusyy } }py~ uqpxrpu|uz p ypus ~pwu~y : us|yrp~yu tyspu us|yrp~yu} t|yu|~y (yy~) y}|p |r|~ . Ot~ru}u~~u tywu~yu ru rytr uu{pyrpu}z rt tpr|u~yu r yu} }w~ tu|p { rpu~y , xpyrpu r wu xp|p~yrp~ y ~usuq|u~y p~tp~s ~pwu~y y|y rty r x~pyu|~z uu~y ~ pz 1 , {p{ qtrp~y . Py~yyp|~z qu~~ y~rur tyspu {~|u} u|s {}|u{p px|y~ }py~ y quuyrpu y~ytp|~u ~pwu~yu yx}u~u}z p , rp| , u{|r|{~p y |u~~}y pp{uyy{p}y . Suuyu{y ~ywu~yu {y ~ppp~y ~pwu~y . Kp{ pry| , uqpx }up~yu{ }~ y~p|~p {q {y ~p ~ywu~~z pu uqu pr|u}z r}yu| . ^|u{~~z uqpxrpu| , ~ t|wu~ uturrp p uqpxrp~y ~usyy . Bq y~rup {}}yu ~p rtu PX y}u~ tryspu|y yx|yrp~~} xpr} (IGBT - pp{uyy{y tryspu| , }w~ |y {~}y |u{~usyy 54% , tu}~y{y (t|~yu|~ rx}w~ r{|u~y uqpxrpu| ~yxy u~ . Pyrutu~~u ~utp{y yrt { } , ~ y ~p qpxu IGBT quuyrp ~uqty}z { { ) . Ix s yp qtu { xp u pty uwy}r py~p|~ pqp r ru yxtu|yu |{ }u {rx |ux . Tru|yu~yu {p |wq , 7 % , {u pqp y } ~ tpu ~yx{ { rpu~y . B p~p uqpxrpu|y p y urpp ~p{~u r tuzryu|~y }p| (r ut~u} ~p py~~~ yrtr rp|{r |sp~sr . T py~~~ tryspu|uz . Bu{~u pr|u~yu y|r}y |u{~~}y {|p}y . B q|uu 10 B . Iyu{y |wy| , uru y q|uu y tu|~} us|yrp~yy r|yu ~u xr|u uqpxrpu| us|yrp~yu} tpr|u~y r q y}u~ tryspu|y ~~s {p utu| ...@u}~ p~ uqpxrpu|uz
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