This document provides an introduction to the course "Power Electronics". It defines power electronics as the field that processes and controls the flow of electric power through conversion and control. The document outlines the 5 units that will be covered: power semiconductor devices, AC to DC conversion, DC to DC conversion, DC to AC conversion, and AC to AC conversion and control circuits. It also discusses the history and wide range of applications of power electronics in industrial systems, transportation, utilities, electronics equipment, and other areas. The advantages of power electronics converters include fast response, high efficiency, compact size, and increased flexibility through digital control. Drawbacks include potential for harmonics production and higher initial cost compared to simple conversion equipment.

1. INTRODUCTION TO
POWER ELECTRONICS
Dr. S. Anbarasi, Associate Professor /EEE
P.S.R Engineering College, Sivakasi

2. Content
Unit 1 - POWER SEMICONDUCTOR DEVICES
Unit 2 - AC TO DC CONVERTERS
Unit 3 - DC TO DC CONVERTERS
Unit 4 - DC TO AC CONVERTERS
Unit 5 - AC TO AC CONVERTERS & CONTROL CIRCUITS

3. Introduction to the course
Outline
What is power electronics?
Semiconductor
About this course
The history
Applications
Advantages and Disadvantages

4. What is power electronics?
1) Definition
Power Electronics is the electronics applied to conversion and control
of electric power.
Range of power scale :
milliwatts (mW) megawatts(MW) gigawatts (GW)
A more exact explanation:
The primary task of power electronics is to process and control the
flow of electric energy by supplying voltages and currents in a form
that is optimally suited for user loads.

5. What is a Semiconductor?

6. Energy bands in Insulator

7. Energy bands in Conductor

8. Energy bands in Semiconductor
e- e- e-

9. Power electronics system

10. Interdisciplinary nature
Electronics
Devices and Circuit
Power
Static and Rotating
Power equipment
Control
Continuous discrete
control
POWER
ELECTRONICS

11. Relation with multiple disciplines
Power electronics is currently the most active discipline in electric power
engineering.
Circuit
Theory
Systems &
control
Theory
Signal
Processing
Simulation &
Computing
Electronics
Solid state
physics
Electromagnetics
Power
Systems
Electric
machines
POWER
ELECTRONICS

12. The history

13. Applications
Industrial applications
 Motor drives
 Electrolysis
 Electroplating
 Induction heating
 Welding
 Arc furnaces and ovens
 Lighting

14. Applications
Transportation applications
 Trains & locomotives
 Subways
 Trolley buses
 Magnetic levitation
 Electric vehicles
 Automotive electronics
 Ship power systems
 Aircraft power systems

15. Applications
Utility systems applications
 High- voltage dc transmission(HVDC)
 Flexible ac transmission(FACTS)
 Static var compensation & harmonics
 suppression: TCR, TSC, SVG, APF
 Custom power & power quality control
 Supplemental energy sources
 wind, photovoltaic, fuel cells
 Energy storage systems

16. Applications
Power supplies for electronic equipment
 Telecommunications
 Computers
 Office equipment
 Electronic instruments
 Portable or mobile electronics

17. Applications
Residential and home appliances
 Lighting
 Heating
 Air conditioning
 Refrigeration & freezers
 Cooking
 Cleaning
 Entertaining

18. Applications
Applications in space technology
 Spaceship power systems
 Satellite power systems
 Space vehicle power systems

19. Applications
Other applications
 Nuclear reactor control
 Power systems for particle accelerators
 Environmental engineering

20. Advantages of power electronics converter
Fast dynamic response due to static device
Low losses so high efficiency
Compact size and light weight
Increased operating life and reduced maintenance
Power electronic controllers are useful digital/ microprocessor
based control system. So increased flexibility in control.

21. Drawbacks of Power Electronics converter
Production of harmonics
In some Power electronic devices power factor is low
power factor correction is needed
For simple conversion equipment power electronic
devices are very costly
Low overload capacity

22. References
https://www.youtube.com/watch?v=gUmDVe6C-BU
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.
Slide share: Power Electronics Lecture 1 by Prof. Mohammed Zeki Khedher Department of
Electrical Engineering, University of Jordan