Pdf energy efficiency of computer power supplies researchgate. A psu power supply unit converts the power received from the wall outlet to the power power needed to supply power to the mother board and all other components within the pc. Switchedmode and uninterruptible power supplies, and electronic. Other devices which need to be cooled include the power supply unit. A power supply is a component that supplies power to at least one electric load. The primary goal of safety standards for power supplies used in electrical. Definition what does switchedmode power supply smps mean. Application manual power supply units applications for. Pdf optimal reactive power supply in distribution networks. Power supplies must only be installed and taken into operation by adequately qualified. Essential guide to power supplies 1st edition xp power romania. Intel technologies features and benefits depend on system configuration and may require enabled hardware, software or service. Power supply safety standards, agencies and marks cui inc. Laptops use an external power supply, called a power adapter or power brick.
Pdf on jan 1, 2002, bernard aebischer and others published energy. Pdf file also enable you to go directly to the next desired catalogue page. Optimal reactive power supply in distribution networks technological and. On a modular power supply unit, those cables can be detached from the psu. It converts the alternating current from your wall outlet into a continuous form of power called direct current that the computer components require. Typically, it converts one type of electrical power to another, but it may also convert a a different form of energy such as solar, mechanical, or chemical into electrical energy. Variable ac supply, linear regulated unregulated supplies, smps and ups. Further technical articles are available online at. The curve varies from model to model examples of how this curve looks can. Figure 3 unregulated power supply the ac mains voltage 5060 hz applied at the input side is transformed to a lower level and rectified by a subsequent rectifier. Power supply unit article about power supply unit by the. Single and threephase switched mode power supply units.
Power supply is one of the most important topics that we often ignore. Finally, it describes and explains application examples for engineering. Power supply unit a power supply unit psu converts mains ac to lowvoltage regulated dc power for the internal components of a computer. This video explains linear power supply basics with supporting circuit diagrams and waveforms. The international electrotechnical commission iec and the associated international. The computers power supply unit psu converts the domestic alternating current ac mains supply voltage 220240 volts in europe into various regulated, low voltage direct current dc outputs required by the components that make up the computer system. It receives power from an electrical outlet and converts the current from ac alternating current to dc direct current, which is what the computer requires. Modern personal computers universally use a switchedmode power supplysmps. It also regulates the voltage to an adequate amount. Classification of power supply and its different types. A label on one side of the box lists technical information about the power supply. A power supply unit or psu converts mains ac to lowvoltage regulated dc power for the. Psu an electronic module that converts high voltage 110 or 240 vac alternating current mains electricity into smoothed direct current at the various differnt voltages required by the motherboard. No responsibility is taken for the correctness of technical information.