By Khalid Betani
Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type.
So the function of a DC Power Supply is to provide Direct current to various accessories of computer such as Hard Disk, Ram, Picture Tube or LCD, Mother Board, CD Rom/DVD Rom, etc, so that they function properly.
A: The function is to change the pulsating DC into a smooth DC by removing the peak changes. The results are very little AC variation riding on top of the DC value or simply referred as ripple.
The PC power supply box's function is to supply the computer with power. Without the PC power supply box, the computer would not be able to turn on and off.
Computers work on DC supplies and convert AC to DC supply through SMPS (fixed in cabinet). Specifications of SMPS decides the load a Computer can handle.
On a desk top, it connects power from the outlet on the wall to the power supply in the computer. On a laptop. It converts the mains AC power at high voltage to a low voltage DC. Most laptops use around 19v DC. This is then used to charge the battery in the laptop. When the battery is full, the laptop is then powered by the mains supply, leaving the battery in standby. On a desk top the power supply is inside the cabinet. On a laptop it is separate. This saves weight and space when using the laptop totally portable and running on battery
Generally, it contains AC-to-DC converter, surge protector, and cooling fan.
It filters ac to pure dc
to convert AC into DC voltage without fluctuation
DC Power is Direct Current Power Supply.
dc power supply
conclusion of dc power supply 9V
In an ideal DC power supply, there is no ripple.
DC 12V power supply can convert 110/220V AC power source to 12V DC.
The DC supply may supply power to trip breakers, or to power the protective relays.
A: The function is to change the pulsating DC into a smooth DC by removing the peak changes. The results are very little AC variation riding on top of the DC value or simply referred as ripple.
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Variable dc supply is applicable in loads that are variable.
Variable DC power supplies are commonly used in electronics labs, production lines, and testing environments. They are used to power and test electronic devices such as electrical components, circuits, and sensors. Variable DC power supplies are also used in research and development for prototyping and experimenting with different voltage levels.