Power supply function and operation

Primary Function and Operation. The basic function of the power supply is to convert the type of electrical power available at the wall socket to the type the computer circuitry can use. A power supply is an electrical device that supplies electric power to an electrical load.

Several direct-current voltages are require and they must be regulated with some accuracy to provide stable operation of the computer . This 5-volt signal allows ATX power supplies to support ACPI, which is covered later in the chapter, and also lets the motherboard and operating system control the power supply.

The two basic types of power supply filters are the capacitance filter (C-filter) and RC-filter.

The C-filter is the simplest and most economical filter available.

Its primary function is to pass most of the dc . The power supply receives 1or 230V and converts into 3. For example, motherboard and cards use 3. The most power demand parts such as Fan and drives need 12V to operate. Safety aspects of working on power supplies. Without it, a computer is just an inert box full of plastic and metal. Without opening your computer, this is typically the only part of the power . The output from the regulated . A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide . In contrast, a switched-mode power supply changes output voltage and current by switching ideally lossless storage elements, such as inductors and capacitors, between different electrical configurations.

Ideal switching elements ( approximated by transistors operated outside of their active mode) have no resistance when . Input transformer: The input transformer is used to transform the incoming line voltage down to the required level for the power supply. It also isolates the output circuit from the line supply. Almost all basic household electronic circuits need an unregulated AC to be converted to constant DC, in order to operate the electronic device. Let us briefly outline the function of each of the elements of the dc power supply. An “Inhibit” type function , requiring an external voltage, . As an electrical device, the computer needs power in order for its components to operate properly.

The device responsible for supplying power to the computer is the power supply. In short, we could say that the main function of the power supply is to convert alternating voltage (a.k.a. AC), which is supplied . Applications for power supply units. Power supplies must only be installed and taken into operation by adequately qualified personnel and under considera-.

Modern power supplies are equipped with various protective functions to protect the device itself as well as the. Electricity grid systems connect multiple generators and loads operating at the same frequency and number of phases, the commonest being three-phase at or Hz. However, there are other considerations.

These range from the obvious : How much power should the generator be able to supply ? The ATX specification defines the . Here the size of the ferrite core reduces inversely with the frequency. Power Supply Unit with sinusoidal mains feedback.