1. POWER ELECTRONICS Instructor: Eng. Jalal Al Roumy The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department بسم الله الرحمن الرحيم EELE 5450 — Summer 2012 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.

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

4.  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 anti-parallel and use blocking diodes to prevent backward conduction) The ideal power electronic device is a perfect switch that

5. Chapter One A Review of Power electronics Applications

6. Chapter One

10. 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 Inverter

18. Chapter One DC-to-AC Inverter

19. Chapter One DC-to DC Chopper

20. Chapter One AC-to AC Converter

21. Chapter One Line Commutated Inverter

22. H.W#1

23. End of Lecture In no more than one page : BMW i8 (Plug-in Hybrid car)