A Dictionary of Electrical Words, Terms And Phrases
A Dictionary of Electrical Words, Terms And Phrases
Edwin J Edwin James Houston
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When the armature of a series or shunt dynamo commences to rotate, the differences of potential generated in its coils are very small, since the field of the magnet is weak, being merely the residual magnetism. The current so produced in the armature, circulating through the field magnet coils, increases the intensity of the mag- netic field of the machine, and this, reacting on the armature, results in a more powerful current through it. This current again increases the strength of the magneti...c field of the machine, which again reacts to increase the current strength in the armature coils, and this continues until the machine is producing its full output. A dynamo-electric machine very rapidly "builds /, " or reaches its maximum current after starting. The reaction principle was dis- overed by Soren Hjorth, of Copenhagen. Machine, Dynamo-Electric, Reversibility of The ability of a dynamo to act as - 35. Separately Excited Dynamo a motor when traversed by an electric cur- rent. (See Motor, Electric.
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