By Edwin J. Houston

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Extra info for Electro-Dynamic Machinery for Continuous Currents

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The gilbert is of a produced by 47T MAGNETIC FLUX. 41 C. G. S. unit current-turn, and, since the C. G. S. 7958). therefore, to divide the number of ampere-turns in any coil of " FIG 31. '*' '''''' DISTRIBUTION OF FLUX IN PLANE OVER A HORSE-SHOE MAGNET. 257) to obtain the M. M. F. of that coil in gilberts. 44. Figs. 31 to 42 are taken from actual flux distributions as obtained by iron filings, and represent a series of negatives or A study of positives secured by the means already described. FIG.

42. If a conductor conveying a current be bent in the form of a circle as shown in Fig. 29, and a current, of say one ampere, be sent through the conductor, there passes through the loop so formed a certain number of stream-lines as represented diagrammatically. If now, the current in the wire be AND 30. SINGLE LOOP OF ACTIVE CONDUCTOR, THREADED WITH FLUX, AND DOUBLE LOOP WITH M. M. F. DOUBLED. FIGS. 29 is increased to two amperes, the flux intensity everywhere will be doubled. The same effect, however, can be practically obtained by sending one ampere through the double loop, shown in Fig.

44, have a cross section of 10 sq. cms. and be uniformly 49. wrapped with insulated wire, then when the current passes through the winding, the magnetic circuit will be entirely confined to the interior of the coil or solenoid, and no magnetic flux will be perceptible in the region outside it. This is the only known form of magnetic circuit in which the flux-paths can be confined to a given channel. These flux-paths are all circular, If the and possess the same intensity around each mean circumference ance of the magnetic circle.

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