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# Electronics Rectifier by IrfanAnsari.com

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• ### Electronics Rectifier by IrfanAnsari.com

1. 1. Instructor: Muhammad Bilal RECTIFIER Tuesday, September 17, 2013
2. 2. Instructor: Muhammad Bilal Half-Wave rectifier
3. 3. Instructor: Muhammad Bilal Block diagram of a rectifier and a dc power supply with a load
4. 4. Instructor: Muhammad Bilal Half-wave rectifier operation. The diode is considered to be ideal.
5. 5. Instructor: Muhammad Bilal The effect of the barrier potential on the half-wave rectified output voltage is to reduce the peak value of the input by about 0.7 V. Thomas L. Floyd Electronic Devices, Electron Flow Version, 5e Copyright ©2005 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved.
6. 6. Instructor: Muhammad Bilal Vp 0 -VP π 2π Vi(t) t VD Vp - VD 0 π 2π Vo(t) t
8. 8. Instructor: Muhammad Bilal Average value of HWR [ ] π V θcos 2π V dθ0dθθsinV 2π 1 dtV T 1 V P π 0 P 2π 0 p T 0 DC = −=     += = ∫∫ ∫ π π
9. 9. Instructor: Muhammad Bilal RMS Value of HWR ( ) 4 V θsinθ π4 V dθ2θcos1 2 1 π2 V dθθ π2 V dθ0dθθsinV π2 1 dtV T 1 V P π 0 P P π 0 P 2π 0 2 p T 0 2 rms 2 2 0 2 2 2 2 2 2 2 1 sin =       −=       −==     += = ∫∫ ∫∫ ∫ π π π
10. 10. Instructor: Muhammad Bilal VDC Vrms t0 t1 t2 t3 Vp VO t
11. 11. Instructor: Muhammad Bilal The PIV occurs at the peak of each half-cycle of the input voltage when the diode is reverse- biased. In this circuit, the PIV occurs at the peak of each negative half-cycle. Thomas L. Floyd Electronic Devices, Electron Flow Version, 5e Copyright ©2005 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved.
14. 14. Instructor: Muhammad Bilal Center-tapped Full-wave Rectifier
16. 16. Instructor: Muhammad Bilal Average Value [ ] π V2 θcos π V dθθsinV π 1 dtV T 1 V P π 0 P π 0 p T 0 DC = −= = = ∫ ∫
17. 17. Instructor: Muhammad Bilal RMS Value ( ) 2 V θsinθ π2 V dθ2θcos1 2 1 π V dθθsinV π 1 dtV T 1 V P π 0 P P π 0 2 p T 0 2 rms 2 2 0 2 2 2 2 2 1 =     −=       −= = = ∫ ∫ ∫ π
20. 20. Instructor: Muhammad Bilal Center-tapped full-wave rectifier with a transformer turns ratio of 1. Vp(pri) is the peak value of the primary voltage. Thomas L. Floyd Electronic Devices, Electron Flow Version, 5e Copyright ©2005 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved.
21. 21. Instructor: Muhammad Bilal Center-tapped full-wave rectifier with a transformer turns ratio of 2 Thomas L. Floyd Electronic Devices, Electron Flow Version, 5e Copyright ©2005 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved.
22. 22. Instructor: Muhammad Bilal Diode reverse voltage (D2 shown reverse-biased and D1 shown forward-biased). Thomas L. Floyd Electronic Devices, Electron Flow Version, 5e Copyright ©2005 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved.
23. 23. Instructor: Muhammad Bilal Full-Wave Bridge Rectifier
24. 24. Instructor: Muhammad Bilal Dr. RS Tuesday, September 17, 2013
25. 25. Instructor: Muhammad Bilal 26 Dr. RS Tuesday, September 17, 2013
26. 26. Instructor: Muhammad Bilal Bridge operation during a positive half-cycle of the primary and secondary voltages 27 Dr. RS Tuesday, September 17, 2013
27. 27. Instructor: Muhammad Bilal Vp 0 -VP π 2π Vi(t) t Vp - VD 0 π 2π Vo(t) t 28Dr. RS Tuesday, September 17, 2013
28. 28. Instructor: Muhammad Bilal Peak inverse voltages across diodes D3 and D4 in a bridge rectifier during the positive half-cycle of the secondary voltage. Dr. RS Tuesday, September 17, 2013
29. 29. Instructor: Muhammad Bilal Power supply filtering 30 Dr. RS Tuesday, September 17, 2013
30. 30. Instructor: Muhammad Bilal Dr. RS Tuesday, September 17, 2013
31. 31. Instructor: Muhammad Bilal 32 Dr. RS Tuesday, September 17, 2013
32. 32. Instructor: Muhammad Bilal Half-wave ripple voltage Dr. RS Tuesday, September 17, 2013
33. 33. Instructor: Muhammad Bilal The frequency of a full-wave rectified voltage is twice that of a half-wave rectified voltage Dr. RS Tuesday, September 17, 2013
34. 34. Instructor: Muhammad Bilal Comparison of ripple voltages for half-wave and full-wave rectified voltages with the same filter capacitor and load and derived from the same sinusoidal input voltage. Dr. RS Tuesday, September 17, 2013
35. 35. Instructor: Muhammad Bilal Vr and VDC determine the ripple factor Vp(rect) : unfiltered peak rectified voltage Vr(pp) : peak to peak ripple voltage VDC : average value of ripple voltage rhwr = Vr(pp) VDC = 1 2 3fRLC 36 Dr. RS Tuesday, September 17, 2013 rfwr = Vr(pp) VDC = 1 4 3fRLC
36. 36. Instructor: Muhammad Bilal Effects of RL and C Tuesday, September 17, 2013Dr. RS C=1000µF C=470µF C=100µF R=1500Ω R=1000Ω R=500Ω (a) RL fixed (b) C fixed