Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 178
iddle wire is connected tothe middle point of the coil, the pressure difference between it and eachof the outer wires is a half of the terminal pressure of the dynamo. A moreperfect arrangement was proposed by Sengel, who connected threepoints of the winding, separated by | of the pole-pitch, to… … Fig. 146 164 Electrical Engineering Dettmar solved the problem in another manner by connecting themiddle wire to an auxiliary brush placed on the commutator halfway be-tween the main brushes (Fig. 146)*. As this auxiliary brush short-circuitstwo segments whenever it bridges the insulation between…
Electrical engineering
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