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 429
er than theinstantaneous efficiency ? 16. What is the essential difference between a constant-voltagetransformer and a constant-current transformer? 17. Why are auto-transformers not more generally used in distribut-ing systems? 18. WThat advantages has electric welding over other methods… … Fig. 264. — An induction motor, (a) rotor and (6) stator. CHAPTER XVIALTERNATING-CURRENT MOTORS Induction motor, its place and essential parts — rotatingmagnetic fields produced by two-phase currents and three-phase currents — rotor, squirrel-cage and wound types —starting and running…
Electricity · Magnetism
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