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Full Wave Rectifier Essay

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How centre tapped full wave rectifier works The full wave rectifier uses a centre tapped transformer to convert input AC voltage into output DC voltage. When input AC voltage is applied, the secondary winding of the centre tapped transformer divides this voltage into two parts. During the positive half cycle of the input AC signal, terminal A become positive, terminal B become negative and terminal C will be grounded (zero volts). The positive terminal A is connected to the p-side of the diode D1 and negative terminal B is connected to the n-side of the diode D1. So the diode D1 is forward biased and allows electric current through it. On the the other hand, the negative terminal B is connected to the p-side of the diode D2 and the positive …show more content…

A high percentage of rectifier efficiency indicates a good rectifier while a low percentage of rectifier efficiency indicates an inefficient rectifier. Rectifier efficiency is defined as the ratio of DC output power to the AC input power. It can be mathematically written as η = output PDC / input PAC The rectifier efficiency for a full wave rectifier is 81.2%. The rectifier efficiency of a full wave rectifier is twice that of the half wave rectifier. So the full wave rectifier is more efficient than a half wave rectifier Peak inverse voltage (PIV) Peak inverse voltage or peak reverse voltage is the maximum voltage a diode can withstand in the reverse bias condition. If the applied voltage is greater than the peak inverse voltage, the diode will be permanently destroyed. In full wave rectifier, The peak inverse voltage (PIV) = 2Vsmax DC output current At the output load resistor RL, both the diode D1 and diode D2 currents flow in the same direction. So the output current is the sum of D1 and D2 currents. The current produced by D1 is Imax / π and the current produced by D2 is Imax / π. So the output current IDC = 2Imax / π

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