An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 433
, and D, is shown infigure 270. It may be seen that, justas in the two-phase motor, a revolvingfield is produced, which is of constantstrength and makes one revolution while the current in onephase passes through one cycle. In actual machines these coils are embedded in slots exactlyas in the… … A B C D Fig. 270. — Revolving field of a two-pole three-phase induction motor. 266. Rotor of an induction motor. Any piece of metalwhich is free to rotate will rotate when placed within thisrevolving magnetic field. But the rotor can never spin quiteso fast as the magnetic field. This difference…
Electricity · Magnetism
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