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How Does A Power Supply Work?

Views:101     Author:Site Editor     Publish Time: 2019-09-09      Origin:Site


The power supply is a device that supplies power to an electronic device, which is also called a power supply. It provides the power needed for all the components in the computer. The power supply size, current and voltage stability will directly affect the computer's performance and service life. This article focuses on different types of power principles.



power supply


Power Supply working principle


Generators convert mechanical energy into electrical energy, and dry batteries convert chemical energy into electrical energy. The generator and the battery itself are not charged. The two poles have positive and negative charges respectively. The voltage is generated by the positive and negative charges. To generate the current, only the voltage needs to be applied. When the two poles of the battery are connected to the conductor, the current is generated. The charge is released.


A device that converts alternating current into direct current through a transformer and a rectifier is called a rectified power supply. An electronic device that provides a signal is called a signal source. The transistor can amplify the signal sent from the front and transmit the amplified signal to the subsequent circuit. The transistor can also be seen as a signal source for the circuit behind it. Rectified power supplies and signal sources are sometimes called power supplies.



Computer power supply working principle


The computer power supply is a closed independent component installed in the mainframe. Its function is to convert the AC power to a stable DC power such as 5V, -5V, +12V, -12V, +3.3V through a switching power supply transformer. System components in the main chassis, floppy disk, hard disk drive and various adapter expansion cards and other system components. HP-supported uninterruptible power supplies (UPS), such as HP PowerTrust, protect against momentary power loss. The disk should be connected to the power supply circuit in such a way that the mirror copies are connected to different power supplies. The root disk and its corresponding node should be powered by the same power circuit. An HP representative can provide detailed information about the power, disk, and LAN hardware layout of the cluster. If all hardware in the cluster has 2 or 3 power inputs, then at least three separate circuits are required to ensure that there is no single point of failure in the cluster's circuit design.

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Switching power supply 

The switching power supply works in a linear power supply, and the power transistor operates in a linear mode. Unlike a linear power supply, the PWM switching power supply operates the power transistor in an on state and in a shutdown state. The volt-ampere product applied to the power transistor is small.


The PWM switching power supply converts the input DC voltage into a pulse voltage having an amplitude equal to the amplitude of the input voltage. The duty cycle of the pulse is regulated by the controller of the switching power supply. Once the input voltage is clamped into an AC square wave, its amplitude can be raised or lowered by the transformer. The voltage value of the output can be increased by increasing the number of secondary windings of the transformer. Finally, these AC waveforms are rectified and filtered to obtain a DC output voltage.


The above is the relevant knowledge about the principle of power supply. Follow us for more information on power or power supplies. Products include conventional inverters, charging switching inverters, solar inverters, adjustable power supplies, switching power supplies, LED drive power supplies, and charging power supplies.



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