Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 255
sidering a bipolar machine, the vector willrotate at the same rate as the armature. The direction of rotation is im-material, but we shall always assume it to be anti-clockwise. In its initialposition the vector will lie horizontally to the right of 0. The angle a whichit makes with its initial… … Fig. 225 Hence, the instantaneous value of the electromotive force is equal atevery moment to the projection of the radius vector upon the verticalaxis. To make the matter still clearer, a sine curve representing half a periodhas been added in Fig. 225 to show the connection between it and the…
Electrical engineering
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