The most important question of Rectifiers and Filters in Electronic Devices and Circuits; explain about the Full-Wave Rectifier with input and output wave forms? is being answered here.
Full – Wave Rectifier:
A full-wave rectifier converts an ac voltage into a pulsating dc voltage using both half cycles of the applied ac voltage. In order to rectify both the half cycles of ac input, two diodes are used in this circuit. The diodes feed a common load RL with the help of a center-tap transformer.
A center-tap transformer is the one which produces two sinusoidal waveforms of same magnitude and frequency but out of phase with respect to the ground in the secondary winding of the transformer. The full wave rectifier is shown in the figure below.
Operation: During positive half of the input signal, anode of diode D1 becomes positive and at the same time the anode of diode D2 becomes negative. Hence D1 conducts and D2 does not conduct. The load current flows through D1 and the voltage drop across RL will be equal to the input voltage.
 |
| Fig. Full-Wave Rectifier. |
During the negative half cycle of the input, the anode of D1 becomes negative and the anode of D2 becomes positive. Hence, D1 does not conduct and D2 conducts. The load current flows through D2 and the voltage drop across RL will be equal to the input voltage.
It is noted that the load current flows in the both the half cycles of ac voltage and in the same direction through the load resistance.
Analysis: Let a sinusoidal voltage Vi be applied to the input of a rectifier. It is given by Vi=Vm sinωt
 |
| Fig. wave forms of the input voltage, the o/p voltage across the load Resistor |
No comments:
Post a Comment
Dear visitor, kindly ask us whatever you want related to Electronic Devices and Circuits through comment(s). They will be posted as soon as possible which will be helpful to your development and our improvement. Encourage us by asking and staying connected with us always, thank you. Interested to work for this site (blog), whatsapp @ 7893356131 - NRR.