ELECTRICAL ENGINEERING

In the beginning

The Electrical engineering field flourished in the beginning as an identical occupation during the latter half of the 19th century . The field was related to commercialization of

Electric telegraph

Telephone

Electric power distribution

TODAY THE FOLLOWING BRANCHES HAVE EMERGED FROM THE ELECTRICAL ENGINEERING

Electronics

Digital Computers

Power plant engineering

RF Engineering

Control systems

Signal processing and

Telecommunication

ELECTRICAL AND ELECTRONIC ENGINEERS

The electrical engineers are usually concerned with the use of electricity to transmit electric power.

The electronic engineers are generally interested in using electricity for the purpose of processing information.

Quote for Electrical engineers

Give us any form of energy, we (the electrical engineers) convert it into useful Electrical energy.

When Electrical Engineering became a course ?

During these years (1880s), the study of electricity was largely considered to be a subfield of physics.

It was not until about 1885 that universities and institutes of technology such as Massachusetts Institute of Technology (MIT) and Cornell University started to offer bachelors degree in electrical engineering.

The Darmstadt University of Technology founded the first department of electrical engineering in the world in 1882.

FORERUNNERS

of

EEE

William Gilbert

He designed VERSORIUM,

the device which detects

presence of static charges.

versorium

Discovered Electromagnetic induction

The first electrical engineer

ALESSANDRO VOLTA

In 1775, he designed

ELECTROPHORUS, which

produce static electric charge.

In 1800, he designed

VOLTAIC PILE the forerunner

of nowadays battery.

electrophorus

A brief history

1800 voltaic pile developed by Alessandro Volta, a precursor to the battery

1831 Michael Faraday discovers electromagnetic induction

1873 Electricity and Magnetism published by James Maxwell, describing a theory for electromagnetism

Voltaic pile

Circuits containing inductors

Maxwells equations

A brief history

1888 Heinrich Hertz transmits and receives radio signals

1941 Konrad Zuse introduces the first ever programmable computer

1947 invention of transistor

Spark-gap transmitter

Z3 computer

Transistor

A brief history

1958 integrated circuit developed by Jack Kilby

1968 first microprocessor is developed

Integrated circuits

Microprocessor

Fields of study

Power: Creation, storage, and distribution of electricity

Control: Design of dynamic systems and controllers for the systems

Electronics/Microelectronics: Design of integrated circuits, microprocessors, etc.

Signal Processing: Analysis of signals

Telecommunications: Design of transmission systems (voice, data)

Computer: Design and development of computer systems

Instrumentation: Design of sensors and data acquisition equipment

Fields of study

In 1827, he quantified the relation between Electrical current and potential difference between conductors - leading to OHMS LAW.

GEORGE SIMON OHM

MICHAEL FARADAY

The discoveries of Michael Faraday framed the foundation for electric motor. His main inventions are: Electromagnetic induction Diamagnetism Electrolysis

NIKOLA TESLA

Nikola Tesla developed transformers and induction motors used in AC. His inventions includes Induction motor Alternating current Tesla coil Neon lamp Remote control Wireless telegraphy

CHANGES OCCURRED IN THE FIELD OF ELECTRICITY :

In the beginning of 1830s, efforts were made to

apply electricity in the practices of telegraph.

By the end of the 19th century the world had been forever changed by the rapid communication made possible, by engineering developments of land-lines, submarine cables, and wireless telegraphy.

STANDARDISATION OF UNITS:

Practical applications and advances in the field created an increasing need for standardized units to measure.

It led to the international standardization of the units volt, ampere, coulomb, ohm, farad, and Henry.

This was achieved at an international conference in Chicago 1893.

Demand on Electricity

During these decades the use of electrical engineering increased dramatically.

In 1882, Thomas Edison switched on the world's first large-scale electric power network that provided 110 volts direct current (DC) to 59 customers on Manhattan Island in New York City.

THOMAS EDISON

Thomas Edison builds worlds large-scale electric supply network. Incandescent light bulb Phonograph Mimeograph Electricity distribution Carbon microphone Quadruplex telegraph Phonograph cylinder Movie camera

For AC systems, however, the transmitted power limited by reliability and voltage stability requirements. Today, the normal capacity is 600 megawatts(MW) for 400 KV links and 2000 MW for 765 KV systems.

When HVDC ?

The development of HVDC for transmission purposes began in the mid of 1920s.

The first commercial HVDC link, delivered by ASEA (Swedish electrical company) in 1954, carried power between the mainland of Sweeden and the island of Gotland.

Electrical War

Team 1 - Thomas Alva Edison Supports DC

Team 2 - Nikola Tesla Supports AC

Our aim is to attain

Unity Power Factor

High efficiency

Minimum transmission loss

Know something

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Telegraph is the first practical application of electricity.

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