- #1
BigMan52
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Homework Statement
Specify ratings and values for the transformer, bridge rectifier and smoothing capacitor for a 230 V unregulated power supply with an output voltage of 12 V, output current of 2 A and a ripple factor of <0.024
Homework Equations
V * I
V*sqrt 2
C= I/2f*Vr
Id=(1+sqrt2)*IL
The Attempt at a Solution
The transformer VA rating should exceed 12*2 so 24VA
The peak secondary voltage will be 12 * sqrt 2 = 17V
The value of the capacitor will be: 2/2*50*0.815 = 24,540 micro-farads
Bridge rectifier will need to be able to handle the peak forward current of: (1+sqrt2)*2=4.83amps
Power dissipation is 2*2=4watts (assuming 2 volt drop across the bridge)
Have I approached this is the correct way?