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GOSSEN METRAWATT
GOSSEN METRAWATT

... Capacitive devices under test such as cables and coils, which may be charged with test voltage, are discharged by the measuring instrument. The falling voltage value can be observed at the display. Measurements in Accordance with EN 61557, DIN VDE 0413 Nominal current amounts to 1 mA at a test volta ...
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... What to learn and explore Every electrical circuit must have at least one source (which supplies electrical energy to the circuit) and at least one load (which removes electrical energy from the circuit). When two or more loads are connected to a single source, they may be connected in series (end-t ...
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... required [12]. The design of the rectifying unit is often made with respect to the application it is going to be used in. Normal power diodes have an on-state forward voltage drop of about 0.7-1 V depending on the design [12]. The Schottky diode has a significantly lower on-state voltage drop, aroun ...
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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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