Full Wave Rectifier(SI diode)

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1. Presenter: Syed Fahim Shahriar Bsc,in Computer Sciences And Engineering Full Wave Rectifier( SI diode ) AMERICAN INTERNATIONAL UNIVERSITY-BANGLADESH

2. Rectifier Rectifier is that circuit,that convarts AC to DC. The following two types of rectifier circuit can be used: 1.Half wave rectifier 2.Full wave rectifier

3. Full-Wave Rectifier In Full wave retification current flow through the load in same direction for both half cycle of input ac. This can be achieved with two diodes working alternatively. For one half cycle one diode supplies current to load and for next half cycle another diode works.

4. Classification of Full Wave Rectifier The full wave rectifier can be futher divided mainly into following types. 1. Center tapped full wave rectifier. 2.Full wave bridge rectifier

5. Centre Tap Full Wave Rectifier Circuit has two diodes D1,D2 and a centre tap transformer. These are connected to the center tapped secondary winding of the transformer. During positive half cycle Diode D1 conducts and during negetive half cycle Diode D2 conducts. It can be seen that current through load RL is the same direction for both cycle

6. Full Wave Bridge Rectifier 1.Full wave bridge rectifier four diodes are arranged in the form of a bridge. 2.This configuration provides same polarity output with either polarity. 3.The main advantage of this bridge circuit is that it does not require a special centre tapped transformer. 4.The single secondary winding is connected to one side of the diode bridge network and the load to the other side.

7. Full wave Bridge Rectifier Work D2 and D3 will be forward bias when we work with positive half cycle. So current will flow. D1 and D4 will be reverse bias. The current will not flow

8. Full wave Bridge Rectifier work D 1 and D 4 will be forward bias when we work with the negative half cycle. So current will flow. D2 and D3 will be reverse bias. The current will not flow. The direction of the positive half cycle is the same as the direction of the negative half cycle. So even after the signal is negative, We are getting a positive cycle at the output

9. Full Wave Bridge Rectifier Over one full cycle the input and output voltages will appear as shown in Fig. V dc =2*(0.318V m )=0.636V m

10. Full Wave Bridge Rectifier What happens if we use silicon diode instead of ideal Diode?? Using a silicon diode will cause voltage drop in D2 and D3 in a positive half cycle and voltage drop in D1 and D4 in a negetive half cycle. V dc = 0.636(V m -2V t )

11. Full Wave Rectifier Output frequency of FWR: Output frequency of FWR is equal to double of input frequency. This means when input ac completes one cycle ,rectified wave completes two cycle. f out =2 f in

12. Full Wave Bridge Rectifier Advantage: 1.Need for centre tap Xformer is eliminated. 2. PIV is one half of that of centre tap circuit. 3.Output is twice than that of centre tap circuit. Disadvantage: 1.It is difficult to locate the centre tap on the secondary winding. 2.Internal resistance voltage drop is twice than that of Centre Tap Circuit. 3.The diodes used have high peak inverse voltages.

13. Conclusion To design and simulate a Full Wave Rectifier circuit with working theory and the analysis for the full-bridge rectifier circuit. The full-wave rectifier allows us to convert almost all the incoming AC power to DC.

14. Thank You