Examples in Alternating-Currents Volume 1
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Examples in Alternating-Currents Volume 1

Examples in Alternating-Currents Volume 1


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ... called the analysis of the given curve. This process is exactly the reverse of the process of adding together a given number of definite sine-curves to form a resultant periodic curve. The latter process is '.synthesis," and is a much simpler operation than that of analyzing a gfven curve to evaluate its proper sinecomponents. Many important facts may however be ascertained by the graphical process of constructing alternating-curves from given sine-curves; either by adding sine-curves together or by multiplying them by each other. While any periodic irregular shaped wave may be made up of the sum of sine-waves having frequencies that are both an even and an odd number of times the frequency of the fundamental or resultant curve, in ordinary alternating-current practice the irregular periodic pressure and current curves are composed only of the odd sine-components; or as sometimes stated only of the odd harmonics. One reason why this condition obtains may be noted as follows: When an alternating-pressure is induced by moving a wire (inductor) from one magnetic field to another, the direction of the pressure changes from a positive to a negative value when the wire passes from a field having a certain direction to a field having the opposite direction. Under such conditions all the components (harmonics) of the pressure must undergo directional changes in unison with and similar to their resultant pressure. By adding together two or more sine-waves having odd frequencies; one of the sine-curves having 3, 5 or 7 times the frequency of the other, it will be seen that when the resultant curve passes from a positive value to a negative one, (at the end of a positive lobe) all the components do likewise. Sce figure 30, page 109. By adding together two or mor...


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Product Details
  • ISBN-13: 9781130158786
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 48
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1130158780
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 104 gr


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