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Power Electronics - Diode
[Power electronics] The measured values of a diode at a temperature of 25 Degrees Celsius are: Vd=1V at Id=50A, Vd=1.5V at Id=600A.Determine (i) the emission coefficient n, and (ii) the leakage current.Answers:a. (a) n=6, (b) Is=0.2Ab. (i) n=5, (ii) Is=1Ac. (i) n=8, (ii) Is=0.347Ad. (i) n=8, (ii) Is=1A
The reverse recovery time of a diode is trr=5 usec, and the rate of fall of the diode current is di/dt = 80A/usec. If the softness factor is SF = 0.5, determine (i) the storage charge Qrr, and the peak reverse current Irr:a. (i) Qrr=900 uC, (ii) Irr = 200Ab. (i) Qrr=500 uC, (ii) Irr = 500Ac. (i) Qrr=200 uC, (ii) Irr = 100Ad. (i) Qrr=1000 UC, (ii) Irr = 400A
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