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Technical Description
Technical Description

... 6 If the part is a custom made item, has the party given quality assurance certificate/test facilities in the quotation? 7 Is the bidder the manufacturer of the offered part? 8 Is the bidder an authorized distributor/dealer for the supply of the offered part? (If yes, attach a proof for the same.) 9 ...
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... The MVW3000 medium voltage variable speed drive, which features extremely high efficiency, power density and reliability, is sold as a complete system integrated into a switchgear cabinet. WEG, a leading global manufacturer of drive technology, presents the new MVW3000 series of variable speed drive ...
Integrated Circuit Voltage Regulators
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... cause erratic behaviour. The part of a power supply unit responsible for maintaining a constant output voltage is called the voltage regulator. Voltage regulators maintain a constant output voltage even when operating conditions tend to cause a change in voltage. Two such conditions may occur: 1. Th ...
Power and Energy Practice Sheet
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Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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