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POWER ELECTRONICS

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — Fall 2009-2010. Instructor: Eng.Moayed N. EL Mobaied. Lecture 2. Chapter One.

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POWER ELECTRONICS

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  1. بسم الله الرحمن الرحيم The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department POWER ELECTRONICS EELE 5450— Fall 2009-2010 Instructor: Eng.Moayed N. EL Mobaied Lecture 2

  2. Chapter One Question: What are power electronic devices? Answer: Fast switches that can handle high voltages and currents Question: Why do we need these fast switches? Answer: To efficiently convert AC to DC, DC to DC, or DC to AC, or to efficiently control average power flow. (Efficiently usually means greater than 80% – 90%)

  3. Chapter One A switch Rugged, reliable, efficient, long lived, but not very fast

  4. Chapter One The ideal power electronic device is a perfect switch that • is fast − can open and close instantly (thus no switching losses), and at a high rate (i.e., operating frequency) • when closed, can conduct any amount of current with no internal voltage drop (thus no conduction losses) • when open, will conduct no current and can withstand any voltage without breakdown • will be unidirectional or asymmetric (that is an inherent property of power electronic devices, and we can always place two switches in antiparallel and use blocking diodes to prevent backward conduction)

  5. Chapter One A Review of Power electronics Applications

  6. Chapter One

  7. Chapter One

  8. Chapter One

  9. Chapter One

  10. Chapter One AC-to DC Converter

  11. Chapter One AC-to DC Converter

  12. Chapter One AC Voltage Controllers

  13. Chapter One AC Voltage Controllers

  14. Chapter One DC-to AC Inverters

  15. Chapter One DC-to AC Inverters

  16. Chapter One DC-to AC Inverters

  17. Chapter One DC-to-AC Converter

  18. Chapter One DC-to-AC Converter

  19. Chapter One DC-to-AC Converter

  20. Chapter One DC-to DC Converter

  21. Chapter One AC-to AC Converter

  22. Chapter One Line Commutated Inverter

  23. H.W#1 • In no more than one page : • Write about one of modern Applications of Power electronic converters. End of Lecture **** Eng.moayed

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