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Nikola tesla

时间:2025-10-14 09:51来源: 作者:admin 点击: 1 次
The core for the field-magnet is built up of two circular parts H H, formed with annular grooves I, which, when the two parts are brought together, fo

The core for the field-magnet is built up of two circular parts H H, formed with annular grooves I, which, when the two parts are brought together, form a space for the reception of the energizing-coil G. parts or hubs 0f the cores H II are trued off, so as to fit closely against one another, while the outerportions or flanges which form the polar faces J J arereduced somewhatin thickness to make room for the conductor D, and are serrated on their faces or provided in any other convenient way with polar projections. The two parts of the core H H are mounted on and fixed to the shaft K, and are bound together by bolts L. The number of serrations in the polar faces is arbitrary; but there must exist between them and the radial portions of the conductor D a certain relation, which will be understood by reference to Fig. 4, in which N N represent the projections or points on one face of the core of the field, and S S the points of the other face. The conductor D is shown in this figure in section, a a designating the radial portions of the conductor, and b the insulating-divisions between the same. The relative width of the parts a a and the space between any two adjacent points N N or S S is such that whenthe radial portions a of the conductor are passing between the opposite points N S, where the field is strongest, the intermediate radial portions a are passing through the widest spaces midway between such points and where the field is weakest. Since the core on one side is of opposite polarity to the part facing it,'all the points or projections of one polar face will be of opposite polarity to those of the other face. Hence, although the The centralspace between any two adjacent points on the samefac'e may lie efitiemely small, there will be no leakage of the magnetic lines between any two points of the same name; but the lines of force will pass across from one set of points to the other. The construction followed obviates to a great degree the distortion of the magnetic lines by the action of the current in the conductor D, in which it will be observed the current is flowing at any given time from the center toward the periphery in one set of radial parts a and in the opposite direction in theadjacent parts a.

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