Project 2

Input voltage = 45-60V

Outut Voltage = 3V

Output Current = 100A

Switching Frequency = 20khz

Duty ratio = 0.5

Calculations:

For this design we are using the Forward converter formulas:

1) Duty cycle:

Vout/Vi = D.(N2/N1)

For 50 Duty ratio

N2/N1 = 0.1

These we choose the following:

N1 = 500

N2 = 50

2) Since we choose D = 0.5 then using equation we found that,

Thus we will choose,

N3 = 150turns

Inductor for 40% current ripple:

4) Now we are calculate the capacitor:

Input Voltage = 60V

Input Current = 5A

Output Voltage = 3V

Output Current = 100A
from all the above data we get the input power is 300w and output power is also 300W

Considering ripple we are getting the efficiency above 90%