Project 2
1. Buck,
• Input voltage: 45 – 60 v
• Output voltage: 3 V
• Output current: 100A
Consider, Vin = 60V, Vout = 3V
CCM mode,
D = Vo/Vin = 3/60 =~ 0.05
Rout = 3/100 = 0.03ohm, di = 1A, dv = 0.3V
fs = 50KHz
L = V*D/di*fs = (60-3)*0.05/1*50K = 57uH
C = I*(1-D)/dv*fs = 100*0.95/0.3*50K = 6.3m
Output waveform
Efficiency:
Below Waveforms compares Input Power and Out power (Vin*Iin & Vout*Iout)
Average input Power = 0.05*5850 = 293W
Outpour = 2.92*97 = 283W
so eff = 283/293 = 96.5%
Inductor V&I
Forward Converter,
Power Input & Output
eff = 300 / (0.325*1000) = 92.3%
