New PDF release: AC power systems

By Whitaker, Jerry C

ISBN-10: 084937412X

ISBN-13: 9780849374128

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Sample text

It is important to observe that the armature circuits are in fact exposed to two rotating fields, one of which (the armature field) is caused by and tends to counter the effect of the other (the rotor field). , open-circuited stator windings). This phenomenon is referred to as armature reaction. © 1999 CRC Press LLC It is possible to build a machine with p poles, where p = 4, 6, 8, . . (even numbers). 29. For the specified direction of the (dc) current in the rotor windings, the rotor field has two pairs of north and south poles, arranged as shown.

In addition, a few fast breeder reactors are in operation. These reactors are built for better utilization of uranium fuel. The modern nuclear plant size varies from 100 to 1200 MW. 37a. The reactor heats the water from about 550 to approximately 650°F. High pressure, at about 2235 psi, prevents boiling. Pressure is maintained by a pressurizer, and the water is circulated by a pump through a heat exchanger. The heat exchanger evaporates the feedwater and generates steam, which supplies a system similar to a conventional power plant.

The steam separators are above the core, and the steam dryers are at the top of the reactor. The reactor is enclosed by a concrete dome. 39 Low-head hydroelectric power plant. (From [8]. 3 Hydroelectric Power Plants Hydroelectric power plants convert energy produced by a water head into electric energy [7]. The head is produced by building a dam across a river, which forms the upper-level reservoir. In the case of low head, the water forming the reservoir is fed to the turbine through the intake channel or the turbine is integrated in the dam.

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AC power systems by Whitaker, Jerry C

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