Question

Two 25A thyristors are connected in parallel to switch a 25 kW heater load. The ratings of the heater and the on-state characteristic for the two thyristors are as follows;
Power: 25 kW
Element resistance: 12 Ω
Rated Voltage: 600 V

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Answer #1

oLoad is askin 4 60040 lts (a) Soamrent taken by Load = &sXI 03 エ= 4-67 A Let the Cumrent thaugh TI be I, in onstate & ument I, T be So エ= エ+エ2 A エ+ エ。=4-(7 9re connected T 4T the too thyistors acoss Ti &T,_ Notage So parallel qual will be T2 Ti egusting egiven eguations f Ti4 T, in on SD state Solin euetion we I2- ^s.34 A I,- 16.33 A

The differenies diffrent foruward due to are Conduction charactershcs . thes due to dtfferent I, are Yated curent sligh tly more than T2 is opera ting To ouercome these Po blems the Sam e mounted On Thymis tors are tempe rq ture theis that Sc Heat Sink Yesistance increase &ame the se due to temperature is Same T2 Ghea t sink a reactor shoun 81 Insertng belouw reactos when the curent , I, ia in(rea sed ordecrealed elw to Some reasion tke temperaliere change develops the polan regctor Such to mantan the emt value a t Same Cumn ts

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Answer 1

oLoad is askin 4 60040 lts (a) Soamrent taken by Load = &sXI 03 エ= 4-67 A Let the Cumrent thaugh TI be I, in onstate & ument I, T be So エ= エ+エ2 A エ+ エ。=4-(7 9re connected T 4T the too thyistors acoss Ti &T,_ Notage So parallel qual will be T2 Ti egusting egiven eguations f Ti4 T, in on SD state Solin euetion we I2- ^s.34 A I,- 16.33 A

The differenies diffrent foruward due to are Conduction charactershcs . thes due to dtfferent I, are Yated curent sligh tly more than T2 is opera ting To ouercome these Po blems the Sam e mounted On Thymis tors are tempe rq ture theis that Sc Heat Sink Yesistance increase &ame the se due to temperature is Same T2 Ghea t sink a reactor shoun 81 Insertng belouw reactos when the curent , I, ia in(rea sed ordecrealed elw to Some reasion tke temperaliere change develops the polan regctor Such to mantan the emt value a t Same Cumn ts