Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 51
Fig. 33. Gramme Ring Armature the current being collected directly from the Avindings by brusheswhich trail on the periphery of the ring, while the inner parts ofthe conductors cut the flux. Fig. 33 shows a completely woundGramme ring armature. … Pig. 34. Simple Drum Winding Drum armatures were introduced by Siemens, who wound coilsof iron wire upon a frame of non-magnetic material. In their com- * In case of magnetic leakage through the opening \n the ring core, the internalparts of the winding would produce an e. m. f. in the opposite…
Electrical engineering
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