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Chapter 26 DC Circuits
Chapter 26 DC Circuits

... and “neutral” wire • Difference in magnetic field is from difference in current flow in these wires • In a normal circuit the current in the “hot” and “neutral” is equal and opposite • Thus the magnetic fields should cancel • If they do not cancel then current is not equal and some of this may be go ...
experiment 2 ohm`s law
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... The resistance of a metallic conductor depends only on its length, the area of cross-section, the material of the conductor and its temperature. It does not depend on either V or I. At a given temperature R= ρ L/Α, where ρ, L and A are, respectively, resistivity, the length, and cross sectional area ...
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Experiment 9: Driven RLC Circuits

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Single phase PWM controller

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power controller user`s manual
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... Thyristor Characteristics:‐ The TRIAC is a three terminal, four layer semiconductor device for controlling current. It gains its name from the term TRIode for Alternating Current. Its three terminals are MT1, MT2 and the gate (G).TRIAC is the most widely used member of the thyristor family. It is ba ...
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... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
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When to use a three-phase pad-mounted transformer COOPER POWER SERIES

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... to provide 133 A more current for the same real power P. The larger current means larger equipment (wires, transformers, generators) which cost more. Larger current also means larger transmission losses (think I2R). Because of the wide variation in possible current requirements due to power factor, ...
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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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