Small motors, transformers, electromagnets; a practical presentation of design and construction data for small motors, small low- and high-tension transformers, electromagnets, and induction coils (1920)
Stoller, Hugh Montgomery, Austin, F. E. (Frank Eugene), 1873-, Seeger, Edwin Wilbur, 1892- joint author, American Technical Society · Chicago, American Technical Society · leaf 273
operation afterthe coil heats. Square=Core Coils. On a.c. circuits the magnetic structureis usually made up of laminated iron. These iron laminationsmust be fastened together rigidly and therefore it is not possibleto make the cores circular on account of mechanical difficulties.The cores of a.c.… … Fig. 10. Square Coil 260 I ELECTROMAGNETS AND COILS 21 rhe turns, resistance, and weight of this type of winding can becalculated from equations (15), (16), and (17). The equation forillowable continuous watts is different, however, and for oblongcores is Wa = (a-\-b-\-TrT)lAL (23) jFor square…
Electric motors · Electric transformers · Electromagnets · Induction coils
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