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            ղ    Ϊҳ
            Ʒ
            > IGBTɢ >

            IGBTbbv-ĵЧ·ģ

            뵼ԿʹòͬĵЧ·ģ
            ·ģ
             ͼ 1: ·ģ (Continued fraction circuit,ҲCauerģ, Tģͻ)
            ·ģ(Continued fraction circuit)Ӧ˴ڲİ뵼ʵ֪ÿIJʱbbv-ܹģȻbbv-Ҫ ÿϵ·ͼʮ鷳ÿһ㣨оƬоƬӲƬƬӲװ壩ӦRCԪʾbbv-˴·ģ͵ĸڵܹÿϵڲ¶Դhttp://www.teacherandtherockbots.com/sr/297.html
             ֲ·ģ
            ͼ 2: ֲ·ģ (Partial fraction circuit,ҲFosterģͻpiģ)
            ·ģͲͬbbv-ֲ·ģ(Partial fraction circuit)RCֲϲӦbbv-ڵûκӦֲøģΪϵ״Ѳõɢеõ˸ģڽ¶ȷֲ
            ڱӦֲֲ·ģеϵеrһʾ
            һӣ
            ֲ·ģеϵ
            迹߷̼Tj㹫ʽ
            ˲̬迹
            ֲ·ģк빦P(t), Tcase IGBT ķģ
            ͼ 3: ֲ·ģк빦P(t), Tcase IGBT ķģ
            ʵӦɢƬ¶Ȳܼ򻯼Ϊ㶨ֵΪɢƬʱ䳣ڵʱ䲻Ƕ̵ԺԵڷǹ̶ĹҪTcase(t )в߽IGBTģɢƬģ
            ǵȽ
            ·ģµ¶ʱõȽRt h δ֪ĵȽZt hȻھֲ·ģbbv-һԾĹ뵽IGBTʱͨȽ¶漴˽ʵвڵĽַԱ
            1) ɢƬZth ͨõӦû¶TcaseɢƬ¶Thsbbv-ȽѾɢƬ¶ȲͲٵֿbbv-
            2) IGBTѾ֪빦P(t)¶Tcase(t)ֱӲõӶͼ3õ
            IGBTɢƬþֲ·ģͻ·ģ
            ûĻbbv-bbv-ĿǰеIGBTɢƬȲ·ģͼ·ģͺ;ֲ·ģͶṩIGBTĽᵽɢƬΧȴݹҪIGBTɢƬģͺϲһͻҪĸģ͵رIGBTɢƬǷֱ
            ·ģеIGBT ɢƬ
            ۺϵ·ģ
            ͼ 4: ۺϵ·ģ
            ·ģͺģӵĸϲģʹȴݹϲ㴫—ڵ·еĵ—һʱӳٺ󵽴ﲢɢƬ·ģͿͨһľֲ·ģͱ任õ
            ͨṹÿһϷԪģԿԽһģֻڰijһضɢƬʱǿܵΪɢƬIGBTĴ໥õӰҲӦʱIGBTRthjcӰbbv-ʵеɢƬõɢƬһôͲͨʵʵɢƬнģ
            ֲһֲ·ģ͵IJbbv-ΪǻڲõĽԼṩZthjcΪƵֲ·ģͱ任Ϊ·ģпܵ任һRth/CֵںܶԲͬRthCȡֵbbv-ұ任µ·ģеRCֵͽڵ㶼ûȷbbv-һ任õIJ·ģͶӦ·ģͻִ
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