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Power Electronics Lecture 1. Prof. Mohammed Zeki Khedher Department of Electrical Engineering University of Jordan. 1. References for further information. Textbook: “ Power Electronics: Circuits, Devices and Applications” By M. Rashid, Prentice-Hall. References:

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Power ElectronicsLecture 1

Prof. Mohammed Zeki Khedher

Department ofElectrical Engineering

University of Jordan


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References for further information

Textbook: “ Power Electronics: Circuits, Devices and Applications”

By M. Rashid, Prentice-Hall.


Power Electronics: Converters, Applications and Design By N. Mohan, T. Undeland, and W. Robins, John-Wiley.

Elements of Power Electronics By P. Krein, Oxford University Press.

Power Electronics By C. W. Lander, McGraw-Hill.

rinciple of Power Electronics By J. Kassakian, M. Schlecht and G. Verghses, Addison Wesley.

Power Electronics: Principles and Applications By J. Vithayathil, McGraw-Hill.

Power Semiconductor Circuits By Dewan and Straughen, John-Wiley.


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The interdisciplinary nature

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  • Relation with multiple disciplines

    Power electronics is currently the most active discipline in electric power engineering.

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History of Power Electronics

  • Mercury arc rectifier (year 1900).

  • Metal tank rectifier.

  • Grid controlled vacuum tube rectifier.

  • Ignitron, Phanatron, Thyratron

  • SCR (Silicon Controlled Rectifier)

    - The 1st Thyristor developed by Bell labs in 1956.

    1st Commercial grade SCR developed by

    “ General Electric Co. “ in 1958.


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2. The history

The thread of the power electronics history is the break- through and evolution of power electronic devices.


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Semiconductor rectifier

Mercury arc rectifier


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Thyristor (SCR), GTO, Triac



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Vacuum tube


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Industrial applications

  • Motor drives

  • Electrolysis

  • Electroplating

  • Induction heating

  • Welding

  • Arc furnaces and ovens

  • Lighting

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Transportation applications

  • Trains & locomotives

  • Subways

  • Trolley buses

  • Magnetic levitation

  • Electric vehicles

  • Automotive electronics

  • Ship power systems

  • Aircraft power systems

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Utilitysystems applications

  • High- voltage dc transmission (HVDC)

  • Flexible ac transmission (FACTS)

  • Static VAR compensation & harmonics

  • Custom power & power quality control

  • Supplemental energy sources :

  • wind, photovoltaic, fuel cells

  • Energy storage systems.

  • Fuel cells.

  • Energy storage systems

  • Boiler feed water systems.

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Power supplies for electronic equipment

  • Telecommunications

  • Computers

  • Office equipment

  • Electronic instruments

  • Portable or mobile electronics

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Residential and home appliances

  • Lighting

  • Heating

  • Air conditioning

  • Refrigeration & freezers

  • Cooking

  • Cleaning

  • Entertaining

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Applications in space technology

  • Spaceship power systems

  • Satellite power systems

  • Space vehicle power systems

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Other applications

  • Nuclear reactor control

  • Power systems for particle accelerators

  • Environmental engineering

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  • Easy and flexibility in operation due to digital controls.

  • Faster dynamic response compared to the electro mechanical converters.

  • Lower acoustic noise when compared to electro magnetic controllers, relays and contactors.


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  • High efficiency due to low losses in the Thyristors.

  • Long life and reduced/minimal maintenance due to the absence of mechanical wear.

  • Control equipments using Thyristors are compact in size.


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  • Generate unwanted harmonics.

  • Harmonics are injected into power supply lines affecting the performance of other loads and equipments.

  • Unwanted interference with communication circuits due to electromagnetic radiation.


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  • Special protection circuits must be used to protect the thyristor devices.

  • Thyristors must be rated for maximum loading conditions.

  • Special steps are to be taken for correcting line supply power factor.


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Major issues in power electronics

  • How to meet the requirement of the load or gain better control of the load

  • How to improve the efficiency

  • To have reliable operation of power semiconductor devices

  • To have energy saving

  • How to realize power conversion with less volume, less weight, and less cost.

  • How to reduce negative influence to other equipment in the electric power system and to the electromagnetic environment.

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Power Devices

  • Power Diode

  • Power BJT

  • Power MOSFET

  • IGBT

  • Thyristor (SCR)


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Applications of Power Devices


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