Power electronics
0Power electronics, by Wikipedia https://en.wikipedia.org/wiki?curid=1001628 / CC BY SA 3.0
#Power_electronics
#Electronics_industry
An HVDC thyristor valve tower 16.
8 m tall in a hall at Baltic Cable AB in Sweden A battery charger is an example of a piece of power electronics A PCs power supply is an example of a piece of power electronics,
whether inside or outside of the cabinet Power electronics is the application of electronics to the control and conversion of electric power.
The first high power electronic devices were made using mercury-arc valves.
In modern systems, the conversion is performed with semiconductor switching devices such as diodes, thyristors, and power transistors
such as the power MOSFET and IGBT. In contrast to electronic systems concerned with transmission and processing of signals and data,
in power electronics substantial amounts of electrical energy are processed.
An AC/DC converter （rectifier） is the most typical power electronics device found in many consumer electronic devices, e.
g.
television sets, personal computers, battery chargers, etc.
The power range is typically from tens of watts to several hundred watts.
In industry, a common application is the variable speed drive （VSD） that is used to control an induction motor.
The power range of VSDs start from a few hundred watts and end at tens of megawatts.
The power conversion systems can be classified according to the type of the input and output power Power electronics started with the development of the mercury arc rectifier.
Invented by Peter Cooper Hewitt in 1902, it was used to convert alternating current （AC） into direct current （DC）.
From the 1920s on, research continued on applying thyratrons and grid-controlled mercury arc valves to power transmission.
Uno Lamm developed a mercury valve with grading electrodes making them suitable for high voltage direct current power transmission.
In 1933 selenium rectifiers were invented.
Julius Edgar Lilienfeld proposed the concept of ...
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