Full wave bridge rectifier
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This document describes the operation of a full wave bridge rectifier circuit. It explains that two diodes conduct during the positive half cycle and the other two conduct during the negative half cycle, allowing current to flow through the load in only one direction. This produces a full wave rectified output with both half cycles used. The input AC waveform is shown along with the rectified DC output waveform. Advantages of the bridge rectifier are listed as not requiring a center-tapped transformer and producing twice the output of a center-tap circuit for the same secondary voltage. Disadvantages include requiring four diodes and having double the voltage drop across the diodes compared to a center-tap rectifier.
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Diode applications include rectifiers, clippers, clampers, voltage multipliers, and Zener voltage regulators. Rectifiers convert AC to pulsating DC and are classified as half-wave or full-wave. Clippers control waveform shape by removing portions. Clampers combine a diode and capacitor to clamp an AC signal to a DC level. Voltage multipliers produce an output DC voltage that is an integer multiple of the peak AC input. Zener diodes act as voltage regulators, providing a constant output voltage at their breakdown voltage.
Exp 4
The document describes an experiment to design and test a full wave bridge rectifier circuit. It includes:
1) A list of required equipment including a transformer, diodes, resistor, capacitor, and oscilloscope.
2) An explanation of how a full wave bridge rectifier works using 4 diodes arranged in a bridge configuration to rectify both half cycles of the AC input.
3) The procedure to connect the circuit, observe the input and output waveforms on an oscilloscope, and measure the output voltage and ripple factor both with and without a filter capacitor.
4) The results show that the ripple factor is reduced when a filter capacitor is added.
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Full wave bridge rectifier
- 1. Welcome
- 2. Full wave Bridge Rectifier Rubel Biswas ID:161-15-****
- 4. Operation'sOparetion 1.Two of four diodes are set such direction that they conduct only forword baise. 2.When reverse baise current flow from remaining diode. 3.Current on load resistance always in same direction so output is also same direction.
- 5. Operation'sOparetion P Q AC D 1 D 3D 2 D 4 R L
- 6. On Positive half cycle D 1 D 3D 2 D 4 + -
- 7. On Negative half cycle D 1 D 4 D 3D 2 + -
- 8. Input and Output Wave Form t t V V in o ut
- 9. input output
- 10. (i) The need for centre-tapped transformer is eliminated. (ii) The output is twice that of the centre-tap circuit for the same secondary voltage. (iii)The PIV is one-half that of the centre-tap circuit (for same d.c. output). Advantages :
- 11. Disadvantages : (i) It requires four diodes. (ii) Voltage drop in diodes becomes double of that in case of centre-tap rectifier
- 12. Thank You