Basics of ups seminar presentation

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Basics of ups seminar presentation

  1. 1. Seminar by:S.Murali krishnan5050910061-B Tech EEE,SRM University,Chennai
  2. 2. What is UPS?UPS – Uninterruptible Power Supply is astandby electrical Power source connectedbetween the Power Utility and the load.
  3. 3. • Modern Electronic gadgets and computersystems are highly sensitive to the powerfluctuations• Disruption of power may lead to Data loss/corruption/ malfunction etc.• Standby Power Sources - Generators• Starting the generator takes a few minutes.UPS is mainly used as a Power Backup forthe above few minutes
  4. 4. • UPS maintains power instantaneously byswitching to battery in the event of a power failureor a dip (brown out)• Used to condition the power supply by reducingspikes and harmonics.• Designed to correct a variety of power problems - - Sags – Transient Under voltage - Surge – Short duration high voltage - Brownouts – Low voltage for long time - Spikes – Brief but high energy bursts - Line noise, frequency variation, switchingtransient and Harmonic distortion
  5. 5. Three types of UPS1. Offline UPS2. Line interactive UPS3. Online UPS 5
  6. 6. 1. Offline UPS 6
  7. 7. 2. Line Interactive UPS 7
  8. 8. 3. Online UPS 8
  9. 9. Online UPSMain components of UPS: - Rectifier / Battery Charger - Battery - InverterMain features for a Good UPS: - Shortest changeover time < 4mS - Sufficient battery backup time - Quality output supply 9
  10. 10. Online UPS 10
  11. 11. Online UPS - Operation 11
  12. 12. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 12
  13. 13. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 13
  14. 14. Online UPS - Input 14
  15. 15. Online UPS - Input 15
  16. 16. Online UPS - Input 16
  17. 17. Online UPS - Input 17
  18. 18. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 18
  19. 19. Online UPS -Rectifier 19
  20. 20. Online UPS -Rectifier 20
  21. 21. Online UPS -Rectifier 21
  22. 22. Online UPS -Rectifier 22
  23. 23. Online UPS -Rectifier 23
  24. 24. Online UPS -Rectifier 24
  25. 25. Online UPS -RectifierSwitching speeds and power ratings – SCR Vs IGBT 108 Thyristor Power (VA) IGCT 106 Thyristor IGCT IGBT 104 102 MOSFET 101 102 103 104 IGBT MOSFET Switching Frequency (Hz) 25
  26. 26. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 26
  27. 27. Online UPS – DC System 27
  28. 28. Online UPS – DC System 28
  29. 29. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 29
  30. 30. Online UPS – Inverter 30
  31. 31. Online UPS – Inverter 31
  32. 32. Online UPS – Inverter 32
  33. 33. Online UPS – Inverter 33
  34. 34. Online UPS – Inverter 34
  35. 35. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 35
  36. 36. Online UPS – Output 36
  37. 37. Online UPS – Output 37
  38. 38. Online UPSElements of UPS: - Input - Rectifier / Battery Charger - DC System - Inverter - Output - Static Bypass 38
  39. 39. Online UPS – Static Bypass 39
  40. 40. Online UPS – Static Bypass 40
  41. 41. Online UPS – Other points • Design Factors • Typical Circuit • Typical PCB • Faults • Do’s • Don’ts 41
  42. 42. Online UPS – Design Factors 42
  43. 43. Online UPS – Typical Circuit 43
  44. 44. Online UPS – Typical PCB 44
  45. 45. Online UPS – FaultsOverload TripBattery Low tripOutput OV/ UVOver Temperature 45
  46. 46. Online UPS – Do’s 46
  47. 47. Online UPS – Don’ts 47
  48. 48. 48

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