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 403
tions per minute, which, with a six-polefield, gives a frequency of 25 cycles per second. The three collectorrings are mounted on the armature shaft on the end opposite to thecommutator. It can be seen from the figure that the commutatoris larger in comparison with the size of the machine than is… … Fig. 308. General Electric Three-Phase Rotary Converter for Electric Light Service mains. The use of three brushes on each collector ring is preferableto the use of one broad brush, inasmuch as it is desirable to makethe rings narrow to save space. This machine is rated at 550 volts be-tween its…
Electrical engineering
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