Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 187
ted in another manner, namely, by setting out the external resistance R, i.e. the quotient y, as abscissae and plotting both V and I as ordinates (Fig. 155). Since the product I (R + R^) is equal tothe constant electromotive force, the curve representing I must be a rect-angular hyperbola. Its… … Fig- 154 Fig- 155 the dynamo is short-circuited, and OA = ^- is the short-circuit current. Ra This point lies, naturally, quite outside the working limits, and could onlybe found by plotting the curve for a very small value of the excitation. The limit of the curve V in Fig. 155 can be found from…
Electrical engineering
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