. Electrical world. k the rise of magnetism inI he armature rather than its ultimate development. The invention therefore consists in the combination, in a ma-chine of the kind described, with the rotating armature and coil orcoils thereon, of a stationary coil or coils closed upon itself or them-selves, adapted to produce an effect approximately equal but oppositeto that of the coil carried by the armature, whereby the self-inductionand consequent retardation in the armature will be neutralized or• ivercome. The plan or means by which the invention is carried out is illus-trated in the accomp
. Electrical world. k the rise of magnetism inI he armature rather than its ultimate development. The invention therefore consists in the combination, in a ma-chine of the kind described, with the rotating armature and coil orcoils thereon, of a stationary coil or coils closed upon itself or them-selves, adapted to produce an effect approximately equal but oppositeto that of the coil carried by the armature, whereby the self-inductionand consequent retardation in the armature will be neutralized or• ivercome. The plan or means by which the invention is carried out is illus-trated in the accompaning drawings. Fig. I is an end view of a motor embodying the invention. Fig. 2is a perspective view of an armature, exhibiting, diagrammatically,the special winding which the invention involves. Fig. 3 is an endview of a multipolar field-magnet with the improvements appliedto the same. In Fig. I, A A, represent the field-core of any ordinary motor;B B, the polar projections between which the armature is FIGS. I, 2 AND 3.—SINGLE-PHASE ALTERNATING-CURRENT MOTOR. and CC, the energizing field-coils surrounding such polar projec-tions. D is the armature-core, E the coils wound thereon, and Fis the usual commutator. G designates the stationary coil. Thiscoil is wound in convolutions parallel to those on the armature andare conveniently contained in recesses or grooves H, cut or formedin the faces of the pole-pieces. The relations of the two armature-coils are better illustrated inFig. 2. The armature D in this case is wound in the usual way,with a conductor laid parallel with its axis in coils connected withthe segments of the commutator F. The line of commutation isshown by the position of the brushes L L, and the stationary coil G\< shown as surrounding the armature, its convolutions being inplanes at right angles to the line of commutation. In Fig. I the armature and field-coils are in series and the sta-tionary coil is closed upon itself. The stationary coil is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
