Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 138
of the brushes can be determined by putting arrows on thefront end-connections to indicate the direction of the current. We see thatcurrent flows from the wires 11 and 14 towards the right-hand commutatorsegment, and we therefore place the positive brush on this segment and arrange the other… … In this case, only one coil is short-circuited at the same time. This isalways so if the number of segments is not divisible by the pairs of poles.Generally speaking, this would be an advantage from the point of view ofsparkless commutation, but a disadvantage if the number of coils in the 124…
Electrical engineering
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