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Electromechanical Dynamics (Part 1).0024

Electromechanical Dynamics (Part 1).0024 - Introduction...

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Introduction performing even above 30 MHz are currently the object of research on electromechanical effects found in piezoelectric and piezomagnetic materials. Primary sources of energy are often found in mechanical form in the kinetic energy of an expanding heated gas and in the potential energy of water at an elevation. Electromechanics has always played a vital role in obtaining large amounts of electric power from primary sources. This is accomplished by using large magnetic field-type devices called rotating machines. Today a single generator can produce 1000 MW (at a retail price of 2 cents/kWh this unit produces an income of $20,000/h), and as electric utility systems grow larger generating units (with attendant problems of an unprecedented nature) will be needed. This need is illustrated by the fact that in 1960 the national peak load in the United States was 138,000 MW, whereas it is expected that in 1980 it will be 493,000 MW, an increase of more than 250 per cent in 20 years.
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