. Electrical world. Dynamos, Motors and Dynamo.—Winkelmann.—An illustrated accountof a test of a direct-current dynamo, the feature of which is theconstruction of the armature. It is shown in Fig. i. The armature. FIG. I.—DIRECT-CURRENT DYNAMO. consists of radially-arranged packages of iron sheets, a, which arepressed together by means of b. The direction of the fluxes in thearmature, which is indicated by the arrow, is essentially parallelto the axle and is produced by two neighboring magnet cores. Onaccount of the construction of the armature there are small space
. Electrical world. Dynamos, Motors and Dynamo.—Winkelmann.—An illustrated accountof a test of a direct-current dynamo, the feature of which is theconstruction of the armature. It is shown in Fig. i. The armature. FIG. I.—DIRECT-CURRENT DYNAMO. consists of radially-arranged packages of iron sheets, a, which arepressed together by means of b. The direction of the fluxes in thearmature, which is indicated by the arrow, is essentially parallelto the axle and is produced by two neighboring magnet cores. Onaccount of the construction of the armature there are small spaces, S,which are partly filled by the armature copper. According to thesize of the machine, four or more pairs of poles are used. Theauthor thinks that this type has some advantages over the usualtype. He tested the machine as motor, the continuous load being37 kw; the armature current was 151 amp. and the increase of thetemperature of the armature ° C. The machine was excited sep-arately with 601 watts and the temperature of the exciting coils wasincreased by 59°. The voltage at the terminals was at The efficiency was per cent. The self-inductionof the armature is comparatively low on account of th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
