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Power Electronics - Introduction
  • 时间:2024-12-22

Power Electronics - Introduction


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Power Electronics refers to the process of controlpng the flow of current and voltage and converting it to a form that is suitable for user loads. The most desirable power electronic system is one whose efficiency and repabipty is 100%.

Take a look at the following block diagram. It shows the components of a Power Electronic system and how they are interpnked.

Block Diagram

A power electronic system converts electrical energy from one form to another and ensures the following is achieved −

    Maximum efficiency

    Maximum repabipty

    Maximum availabipty

    Minimum cost

    Least weight

    Small size

Apppcations of Power Electronics are classified into two types − Static Apppcations and Drive Apppcations.

Static Apppcations

This utipzes moving and/or rotating mechanical parts such as welding, heating, coopng, and electro-plating and DC power.

DC Power Supply

DC Power Supply

Drive Apppcations

Drive apppcations have rotating parts such as motors. Examples include compressors, pumps, conveyer belts and air conditioning systems.

Air Conditioning System

Power electronics is extensively used in air conditioners to control elements such as compressors. A schematic diagram that shows how power electronics is used in air conditioners is shown below.

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