The modern electroplater; a complete book considering fully the elementary principles of electro deposition of metals, their practical application and industrial use . Fig. 28.—The Effect of Commutation is to Produce DirectCurrent tator for a single circuit, as shown in Fig. 27, wouldbe in but two sections, thus allowing the brushes tointerchange their connections with the rings at thepoints where reversals of current are about to takeplace. The addition of a commutator changes curve of Fig. 26, so that only positive valuesare given as in Fig. 28. Obviously, the generated by a
The modern electroplater; a complete book considering fully the elementary principles of electro deposition of metals, their practical application and industrial use . Fig. 28.—The Effect of Commutation is to Produce DirectCurrent tator for a single circuit, as shown in Fig. 27, wouldbe in but two sections, thus allowing the brushes tointerchange their connections with the rings at thepoints where reversals of current are about to takeplace. The addition of a commutator changes curve of Fig. 26, so that only positive valuesare given as in Fig. 28. Obviously, the generated by a single wire isinsufficient for practical purposes. Hence, the mod-ern dynamo has an armature wound with a greatmany wires. A large number of such active wires Commutation 65 are so connected that their voltages are , since the wires are evenly distributed aboutthe drum, or armature core, the commutator is con-structed of many segments which are connected tothe winding at regular intervals. This allows an. Fig. 29.—Commutator Assembly (Bennett OConnell Co.) almost constant voltage across the brushes, ironingout, so to speak, the humps in the curve of Fig. 28,and giving an approximately straight, horizontalvoltage line. The commutator is usually built up of especiallyformed copper segments, insulated from each otherby mica pieces. The mica and copper segments areheld rigidly together by heavy iron flanges pressedin position. This construction is shown in Fig. 29. 66 The Modem Electroplater THE ARMATURE WINDING The armature conductors are usually formed ofheavy copper strip insulated with a cotton are several types of windings used for gen-erators, and for a further discussion the reader is
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectelectro, bookyear1920
