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Power Electronic :Introduction

Dr. F. Danang Wijaya, ST, MTLab. TTL

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Generic structure of a power electronic system

Control is invariably required.Power converter along with its controller

including the corresponding measurement and interface circuits, is

also called power electronic system.

Power electronic system

Power Converter

Control input Controller

Reference

Power input

Power output

Feedback (measurements of output signals )

Feedforward ( measurements of input signals )

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• A typical power electronic system

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.

Power Converter

Measurements

Controller Reference

Power input

Power output

Electric Motor light heating other electric equipment power converter

Electric utility battery other electric energy source power converter

Source

Load

io

Vo

ii

Vi

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The interdisciplinary nature

William E. Newell’s description

Power electronics is the interface between electronics and power.

Power Electronics

学

Electronics

Power

学

Control

Continuous,

discrete

连续、离

散

Static & rotating

power equipment

Devices,circuits

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Relation with multiple disciplines

Power electronics

electronics electr

Electric machines

Circuit Ct theory

Systems& Control theory

Control

theory

Signal processing

Simulation & computing

electronics

Solid state

physics

Electromagnetics

Power systems

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

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Position and significance in the human society

• Electric power is used in almost every part and everywhere of modern

human society.

• Electric power is the major form of energy source used in modern human

society.

• The objective of power electronics is right on how to use electric power,

and how to use it effectively and efficiently, and how to improve the

quality and utilization of electric power.

• Power electronics and information electronics make two poles of modern

technology and human society: information electronics is the brain, and

power electronics is the muscle.

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Sejarah Perkembangan

Mercury arc rectifier Vacuum- tube rectifier

Thyratron

Invention of Thyristor

Applicat ion of fast- switching fully- controlled semiconductor

devices

Power diode Thyristor

GTO GTR

Power MOSFET Thyristor

(microprocessor)

IGBT Power MOSFET

Thyristor (DSP)

Pre-history

1st phase

2nd phase

3rd phase

1957

1900

late 1980s

mid 1970s

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Motor drives : Electrolysis Electroplating Induction heating Welding Arc furnaces and ovens Lighting

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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.

• 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