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 93
90, the for-mer type was in universal use for alldirect-current machines, even up to largesizes; but now it is generally restrictedto machines of less than 5 kilowatts out-put, larger sizes being made multipolar tosave material, as explained later. Bipolar field-magnets may be of the simple… … Fig. 89. Under-Type BipolarDynamo
Electrical engineering
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