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A power supply is an electronic device that supplies electric energy to an electric device. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to as electric power converters. Some power supplies are discrete, stand-alone devices, whereas others are built into larger devices along with their loads. Examples of the latter include power supplies found in desktop computers and consumer electronics devices. The power supply circuit comprises of four basic parts:
2. Shunt capacitor
3. Bridge rectifier
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Scope & Importance:
Depending on its design, a power supply may obtain energy from various types of energy sources, including electrical energy transmission systems, energy storage devices such as a batteries and fuel cells, electromechanical systems such as generators and alternators, solar power converters, or another power supply.
Types of power supplies include
1. DC power supply
2. AC power supplies
A power supply provides components with electric power. For example, computer power supplies convert AC current to DC current which are located at the rear of the computer case. It converts one type of electrical power to another, but it may also convert a different form of energy - such as solar, mechanical, or chemical - into electrical energy. Most computers now use a switched-mode power supply, which changes AC current to DC voltage. Most computer power supplies include a number of switched-mode supplies.
Energy concerns are a dominant challenge to businesses and governments around the world. Managing existing electricity usage, ensuring power up-time, and planning for growth are all vital when it comes to electricity and resources. Complicating the picture are environmental concerns such as emissions, water contamination and the use of dangerous materials. Frost & Sullivan’s Power Supplies & Batteries content gets to the heart of one of these key challenges: power quality. From a small uninterruptable power supply (UPS) at a PC, to a bank of batteries backing up a data center, this service shows the intricacies and importance of managing the flow of electricity.
Relevant Society and Associations
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This page was last updated on 12th Sep, 2015
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