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CHAPTER ONE

CHAPTER ONE. INTRODUCTION TO POWER ELECTRONICS DESIGNED BY DR. SAMEER KHADER 2006/2007 PPU “E-learning Project”. Introduction, Classification & Applications.

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CHAPTER ONE

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  1. CHAPTER ONE INTRODUCTION TO POWER ELECTRONICS DESIGNED BY DR. SAMEER KHADER 2006/2007 PPU “E-learning Project”

  2. Introduction, Classification & Applications I- Introduction: Power electronic controllable devices found widespread application in variuos industrial fields, depending on the operation function. These devices can classified in two main families : 1- Thyristor family ( including SCR, TRIAC, DIAC , GTO , Phot Thyristor ,……….); 2- Transistor family ( including BJT, UJT, FET, MOSFET,…., SIT,……) . II- Classification : Power electronic devices may can classified in four main classes , as follows: AC to DC converters Uncontrolled rectifiers ( diodes…) Controlled rectifiers, ( SCR,…) Dc to AC converters Inverters ( Thyristorized or Transistorized ) -VFI, CFI & RFI Power Electronics (Applications) DC to DC converters Choppers( Thyristorized or Transistorized )–Step-down , step-up.. AC Voltage Controller (Thyristorized) Phase-angle control, On-OFF, Cyclo.. AC to AC converters

  3. AC to DC Converters • Power supplies , driving a dc motors, battery charger, … III- Applications : (Fig1- A, B) Dc to AC Converters • Uninterruptible Power Supplies (UPS) ,Brushless dc motor, Lighting , frequency converters … (Fig2-A,B) DC to DC Converters • Voltage regulators and stabilizers , Speed control of dc motors, temperature control, …. (Fig3-A, B) • Speed control of induction machines , RMS voltage control, temperature control, lighting control, frequency changers, cycloconverters,…... AC to AC converters (Fig4-A,B) IV- Advantages: • High efficiency of energy conversion; and minimized losses • High switching capability and reliability ,…. • Long life time ,little maintenance ,… • Light weight, reduced cost and avoiding of transformer drawbacks ,…… • Application in precise systems and hazard operation regions,..

  4. V-Principal circuits: Fig.1A Fig.1B Fig.2A Fig.2B

  5. Fig.3A Fig.3B Fig.4A Fig.4B

  6. THANK YOU FOR YOUR LISTENING IF YOU HAVE QUESTIONS, PLEASE DON’T HESTATE TO CONTACT ME BY EMAIL ON sameer@ppu.edu

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