Outline
I.
What is power electronics?
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II. The history
III. Applications
IV. A simple example
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1) Definition
Power Electronics:
is a branch of electrical Engineering devoted to control and
regulates of electrical power using power electronics converters
based on power electronics devices.
Range of power scale :
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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.
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Conversion of electric power
Power
input
Electric
Power
Converter
Power
output
Power
Control
input
Other names for electric
power converter:
-Power converter
-Converter
-Switching converter
-Power electronic circuit
-Power electronic converter
Two types of electric power
Changeable properties in
conversion
DC(Direct Current)
Magnitude
AC (Alternating Current)
Frequency, magnitude,
number of phases
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Power Electronics Converters
1- AC to DC: Rectifier
AC input
DC output
2- AC-AC: Sycloconverter
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AC input
AC output
3- DC to AC: Inverter
DC input
AC output
4- DC to DC: Chopper
DC input
DC output
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Typical power sources and loads
for a power electronic system
Source
Power input
Vi
ii
Power
-Electric utility
-battery
-other electric energy source
-power converter
Power
Converter
Power output
io
Feedback/
Feed forward
Controller
Reference
Vo
Load
-Electric Motor
-lighting
-heating
-power converter
-other electric or
electronic equipment
The task of power electronics has been recently
extended to also ensuring the currents and power
consumed by power converters and loads to meet
the requirement of electric energy sources.
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Relation with multiple departments
Systems &
Control theory
Signal
processing
Circuit
theory
Power
Electric
machines
Simulation &
computing
Power
electronics
Power
systems
Electronics
Solid state
physics
Electromagnetics
Power electronics is currently the most active
discipline in electric power engineering worldwide.
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II.
The history
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Application of
fast-switching
Invention of
fully-controlled
Thyristor
semiconductor
devices
GTO
GTR
Mercury arc rectifier
Power MOSFET
Power diode
Vacuum-tube rectifier
Thyristor
Thyristor
Thyratron
(microprocessor)
1900
1957
Pre-history
late 1980s
mid 1970s
1st phase
IGBT
Power MOSFET
Thyristor
(DSP)
2nd phase
3rd phase
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III. Applications
Industrial
Transportation
Utility systems
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Power supplies for all kinds of electronic equipment
Residential and home appliances
Space technology
Other applications
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Industrial applications
Motor drives
Electroplating ‫الطالء الكهربائي‬
Induction heating
Power
Welding ‫اللحام‬
Arc furnaces and ovens
Lighting
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Transportation applications
Trains
Electric vehicles
Ship power systems
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Aircraft power systems
‫السفن الهوائية‬
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Power
Utility systems applications
High-voltage dc
transmission(HVDC)
Flexible ac transmission(FACTS)
Static var compensation &
harmonics suppression: TCR,
TSC, SVG, APF
power quality control
Supplemental energy sources :
wind, photovoltaic, fuel cells
Energy storage systems
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Power supplies for electronic equipment
Telecommunications
Computers
Power
Office equipment
server
computer
Electronic instruments
Portable or mobile
electronics
Telecommunication
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Home appliances
Lighting
Heating
Air conditioning
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Refrigeration & freezers
Cooking
Cleaning
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Applications in space technology
Satellite power systems
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Space vehicle power
systems
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Other applications
Nuclear reactor control
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Power systems for
particle accelerators
Environmental
engineering
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Trends
It is estimated that in developed countries now 60%
of the electric energy goes through some kind of
power electronics converters before it is finally used.
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Power electronics has been making major
contributions to:
--better performance of power supplies and better control of
electric equipment
--energy saving
--environment protection
reduction of energy consumption leads to less pollution
reduction of pollution produced by power converters
direct applications to environment protection technology
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References
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“POWER ELECTRONICS CIRCUITS, DEVICES,
APPLICATIONS “ By Mohammad H Rashisd.
Lectures from the internet.
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The End
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