Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 242
n, but which ex-phiins quite as well as the foregoing how the motor operates.In Fig. 243, the current flowing through the upper half of thearmature is in a direction to produce an N pole on the left-hand side, and an S pole on the right-hand side. The sameis true of the current in the lower half.… … Same as 241, except armature poles are indicated. the field poles magnetized, the N pole of the armature will beattracted to the S pole of the field frame and the S pole of thearmature to the N main pole, therefore it will begin toturn in a clockwise direction. So long as the brushes rest…
Electric machinery
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