Dc Power Supply

Written by Kevin Tavolaro
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A DC power supply utilizes "direct current" transmission as its source of energy. Direct current (DC) refers to a stream of electrical charges that consistently flows in the same direction. This distinguishes direct current from alternating current (AC), which, as the name implies, is capable of more than one direction. In a DC power supply, the electricity flows through a conductor, always moving from high to low potential.

DC power supplies were originally implemented for the maintenance of electrical energy transmissions following Edison's discovery of electrical generation methods. While the eventual invention of alternating current may have overshadowed direct current in the long-range transmission of electrical power, DC is still widely used in other areas. A DC power supply is often utilized to link AC electrical power networks that operate at differing frequencies. In addition, DC is usually found in many low-voltage applications, as it provides a more convenient power source for such devices.

DC Power Supply Uses

A DC power supply is required by most smaller electronic circuits, as it offers the most consistently stable degrees of electrical power. Automobile electronics, save for the main generator, are also commonly powered by DC. In addition, small devices are almost always powered by DC, as it is the favored method for powering battery-operated products.

The constant flow and rate of polarity that makes DC so well suited for specific applications, is the result of a low-pass filtering system. A low-pass filter stabilizes the voltage, and evens out any potential variance. This provides for many opportunities, such as solar power, which uses DC to power solar cells. While the majority of DC uses feature smaller devices and voltages, there has recently been experimentation with the use of a high-voltage direct current power supply, or HVDC.


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