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Power Electronics
The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is
135 μs.
140 μs.
130 μs.
145 μs.
135 μs.
140 μs.
130 μs.
145 μs.
Answer
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Related Question
Power Electronics
Power transistor are type of
BJTs.
IGBTs.
MOSFETs.
All of above.
BJTs.
IGBTs.
MOSFETs.
All of above.
Answer
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Power Electronics
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be
1500 A.
2121.32 A.
6000 A.
4242.64 A.
1500 A.
2121.32 A.
6000 A.
4242.64 A.
Answer
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Power Electronics
Dynamic equalising circuit is useful
to limit di / dt of SCR.
both B and C.
to limit dV / dt of SCR.
for voltage equalisation.
to limit di / dt of SCR.
both B and C.
to limit dV / dt of SCR.
for voltage equalisation.
Answer
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Power Electronics
Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then
Vc1 > Vc2 > Vc3 when Ig1= Ig2
Vc1 = Vc2 = Vc3 any value of Ig.
Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3.
Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3.
Vc1 > Vc2 > Vc3 when Ig1= Ig2
Vc1 = Vc2 = Vc3 any value of Ig.
Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3.
Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3.
Answer
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Power Electronics
In a UJT, the p-type emitter is ___________ doped
Lightly
None of these
Moderately
Heavily
Lightly
None of these
Moderately
Heavily
Answer
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