1 / 172

Controlled Rectifiers (Line Commutated AC to DC converters)

Controlled Rectifiers (Line Commutated AC to DC converters). 1. Type of input: Fixed voltage, fixed frequency ac power supply. Type of output: Variable dc output voltage Type of commutation: Natural / AC line commutation. 2. Different types of Line Commutated Converters.

kcrouch
Download Presentation

Controlled Rectifiers (Line Commutated AC to DC converters)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Controlled Rectifiers(Line Commutated AC to DC converters) 1

  2. Type of input: Fixed voltage, fixed frequency ac power supply. • Type of output: Variable dc output voltage • Type of commutation: Natural / AC line commutation 2

  3. Different types of Line Commutated Converters • AC to DC Converters (Phase controlled rectifiers) • AC to AC converters (AC voltage controllers) • AC to AC converters (Cyclo converters) at low output frequency. 3

  4. Differences Between Diode Rectifiers & Phase Controlled Rectifiers 4

  5. The diode rectifiers are referred to as uncontrolled rectifiers . • The diode rectifiers give a fixed dc output voltage . • Each diode conducts for one half cycle. • Diode conduction angle = 1800 or  radians. • We can not control the dc output voltage or the average dc load current in a diode rectifier circuit. 5

  6. 6

  7. Applications ofPhase Controlled Rectifiers • DC motor control in steel mills, paper and textile mills employing dc motor drives. • AC fed traction system using dc traction motor. • Electro-chemical and electro-metallurgical processes. • Magnet power supplies. • Portable hand tool drives. 7

  8. Classification ofPhase Controlled Rectifiers • Single Phase Controlled Rectifiers. • Three Phase Controlled Rectifiers. 8

  9. Different types of Single Phase Controlled Rectifiers. • Half wave controlled rectifiers. • Full wave controlled rectifiers. • Using a center tapped transformer. • Full wave bridge circuit. • Semi converter. • Full converter. 9

  10. Different Types of Three Phase Controlled Rectifiers • Half wave controlled rectifiers. • Full wave controlled rectifiers. • Semi converter (half controlled bridge converter). • Full converter (fully controlled bridge converter). 10

  11. Principle of Phase Controlled Rectifier Operation 11

  12. Single Phase Half-Wave Thyristor Converter with a Resistive Load 12

  13. Supply Voltage Output Voltage Output (load) Current 13

  14. Supply Voltage Thyristor Voltage 14

  15. Equations 15

  16. 16

  17. To Derive an Expression for the Average (DC) Output Voltage Across The Load 17

  18. 18

  19. 19

  20. 20

  21. 21

  22. Control Characteristic of Single Phase Half Wave Phase Controlled Rectifier with Resistive Load 22

  23. 23

  24. 24

  25. Control Characteristic 25

  26. 26

  27. To Derive An Expression for the RMS Value of Output Voltage of a Single Phase Half Wave Controlled Rectifier With Resistive Load 27

  28. 28

  29. 29

  30. 30

  31. Performance Parameters Of Phase Controlled Rectifiers 31

  32. 32

  33. 33

  34. 34

  35. 35

  36. 36

  37. 37

  38. 38

  39. 39

  40. 40

  41. 41

  42. 42

  43. Single Phase Half Wave Controlled Rectifier With An RL Load 43

  44. 44

  45. Input Supply Voltage (Vs)& Thyristor (Output) Current Waveforms 45

  46. 46

  47. Output (Load) Voltage Waveform 47

  48. 48

  49. 49

  50. 50

More Related