The Automobile Storage Battery--Its Care and Repair

The Automobile Storage Battery--Its Care and Repair

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...batteries is much greater. The efficiency of the rectifier varies with the voltage used on the direct-current side, as there is always a drop in voltage through the mercury vapor, which is practically independent of the current used. For rectifiers of 30 to 50 ampere capacity, the drop in voltage across the rectifier terminals is equal to about 15 volts. The lower the direct-current voltage therefore, the greater the percentage of loss. This loss is in addition' to the losses in the auto-transformer and brings the average efficiency down to 75 or 80 percent for a direct current voltage of about 80 volts. When used for charging storage batteries rectifiers require considerable variation of the direct current voltage, and for this reason are usually provided with variable reactance in thi?-primary circuit of the transformer, also with taps in the secondary winding. They are, as a rule, specially designed for the class of work for which they are intended. The Electrolytic Rectifier. AC SOURCE OF ENERGY A B The action of the Electroyltic Rectifier is explained by the fact that certain electrolytic cells having electrodes of different metals will allow a current to pass through them in one direction only. Thus, if a plate of iron and a plate of aluminum be immersed in a solution of ammonium phosphate as shown diagrammatically in Figure 67, and the two plates connected to a source of alternating current, the following results will be obtained. The alternating pressure between the terminals A and B tends to send a current through the cell first in one direction and then in the other direction, and if the resistance of the cell was independent of the direction of the current, there would be an alternating current produced and this current would...show more

Product details

  • Paperback | 72 pages
  • 189 x 246 x 4mm | 145g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236989767
  • 9781236989765