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By Whitaker, Jerry C

ISBN-10: 084937412X

ISBN-13: 9780849374128

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More flux will be produced in a material with a high permeability than in a one with a low permeability, given the same amount of current and the same number of turns in the coil. The ratio of a material's permeability to the permeability of free space, called relative permeability, is often used [4]. The actual permeability, which has units of webers per ampere-turn-meter, is found by multiplying the permeability of free space by the relative permeability. The overall ability of a core to carry flux also depends on its size and shape, and its cross-sectional area.

This means that the power flow must be into the transformer on one side, and out of the transformer on the other side. 5 The Ideal Transformer Although no transformer is ideal in its characteristics, transformers approach their ideal characteristics in the operating range for which they were designed. The ideal transformer has no coil resistance and no core loses, so that it has no power loss [4]. It also has no leakage inductance, because the permeability of the core is infinite, and the core material is able to carry an infinite amount of flux without saturating.

The water tubes are heated by the combustion gases through both connection and radiation. The steam generated in these tubes flows to the drum, where it is separated from the water. Circulation is maintained by the density difference between the water in the downcomer and the water tubes. Saturated steam, collected in the drum, flows through the superheater. The superheater increases the steam temperature to about 1000°F. Dry superheated steam drives the high-pressure turbine. The exhaust from the high-pressure turbine goes to the reheater, which again increases the steam temperature.

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AC power systems by Whitaker, Jerry C


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