1. ALPHA BREATHING

2. TOPIC: Half Wave & Full Wave Rectifier
Basics of Electrical & Electronics Engineering UNIT – IV ELECTRONICS ENGINEERING
TOPIC: Half Wave & Full Wave Rectifier

3. Topics to be Discussed Half wave rectifier & Full wave rectifier
Ripple factor
Efficiency
Peak inverse voltage
Transformer utilization factor
Form factor
Peak factor

4. Power Supply A group of circuits used to convert ac to dc.
Rectifier – Converts ac to pulsating dc.
Filter – Reduces variations in the rectifier output.
Voltage regulator – Maintains a constant dc output voltage.

5. Rectifier
Rectifier is an electronic device used for converting ac voltage into dc voltage.
It utilizes PN junction diode
Rectifiers are classified into two types
Half wave rectifier
Full wave rectifier

6. Half Wave Rectifier
The Half wave rectifier is a circuit, which converts an ac voltage to dc voltage during only one half cycle only.
In the Half wave rectifier circuit shown above the transformer serves two purposes.
It can be used to obtain the desired level of dc voltage (using step up or step down transformers).
It provides isolation from the power line.

7. Full Wave Rectifier
The full wave rectifier is a circuit, which converts an ac voltage to dc voltage during both positive and negative half cycles.
Types
Centre tapped full wave rectifier
Bridge Rectifier

8. Centre tapped full wave rectifier
0 to π D1 Forward biased
D2 Reverse biased
π to 2π D2 Forward biased
D1 Reverse biased

9. Full wave Bridge rectifier
0 to π D1, D2 Forward biased
D3, D4 Reverse biased
π to 2π ----D3, D4 Forward biased
D1, D2 Reverse biased

10. Ripple Factor

11. Half Wave Rectifier
Derive Vdc & Idc
Derive Vrms

12. Half Wave Rectifier
Idc= Vdc/(rs+rf+RL)
Vdc = Vm/∏ - Idc (rs+rf )

13. Half Wave Rectifier

14. Full wave rectifier
Derive Vdc & Idc
Derive Vrms

15. Full wave rectifier Ripple Factor
Idc= Vdc/(rs+rf+RL)
Vdc = 2Vm/∏ - Idc (rs+rf )

16. Half Wave Rectifier Efficiency

17. Half Wave Rectifier

18. Full wave rectifier Efficiency, Form Factor & Peak Factor

19. Half Wave Rectifier Transformer Utilization Factor

20. Full wave rectifier TUF
TUF Centre Tapped Full wave rectifier TUF =0.693 Full wave Bridge rectifier TUF =0.812

21. Peak Inverse Voltage Peak Inverse Voltage(PIV)
Maximum reverse voltage that a diode can withstand without destroying the junction
PIV = Vm for Half wave rectifier & Full wave bridge rectifier
PIV = 2Vm for centre tapped full wave rectifier

22. Comparison

23. PUZZLE
The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be?

24. ANS:
Father 51, son 15 Father 42, son 24 Father 60, son 06

25. PUZZLE
Ram sat with his friends in the Chinnaswamy stadium in Bangalore to watch the 100 metres running race organized by the Asian athletics Association. Five rounds were run. After every round half the teams were eliminated. Finally, one team wins the game. How many teams participated in the race?

26. ANS:32

27. A grand father has 3 grand children
A grand father has 3 grand children. Age difference of two children among them is 3. Eldest child age is 3 times the youngest child’s age and the eldest child age is two year more than the sum of age of other two children. What is the age of the eldest child?

28. ANS:15

29. READING

30. DRAW MINDMAP

31. SUMMARY

32. Moulting (Drawing mind map on the board)

33. Full-wave Bridge rectifier Centre Tapped Full-wave rectifier
Mind Map
TUF 0.287
TUF 0.812
Rectifiers
Half-wave rectifier
Full-wave Bridge rectifier
Ripple Factor 1.21
PIV Vm
PIV Vm
Ripple Factor 0.48
Centre Tapped Full-wave rectifier
Form Factor 1.57
Peak Factor 2
Peak Factor 1.414
Ripple Factor 0.48
PIV 2Vm
Form Factor 1.11
TUF 0.693
Peak Factor 1.414
Form Factor 1.11

34. Moulting (presentation within the group)