RU95100248A - Alternating current two-phase motor - Google Patents

Abstract

FIELD: production of electric machines, synchronous and asynchronous low-power motors production in particular. SUBSTANCE: aim is to decrease active materials and labour consumption, to improve process in the electric motor production. Proposed design decision allows to adjust form of curve of magnetic field distribution in machine clearance due to choice of structural ratios in stator magnetic circuit and so to improve motor performance. Stator magnetic circuit of proposed motor has ring type opened yoke 1, ring type magnetic holder 2 and three poles 3, 4, 5 built-up of laminations, planes of which are in parallel to radial plane, that goes through the pole axis and motor axis. Yoke 1 and magnetic holder 2 are usually built-up of laminations, axes of which are perpendicular to the machine axis. Poles 3 - 5 are mounted in grooves made on outer surface of cylindrical holder 2. Pole 4 and 5 are located diametrically opposite to each other and pole 3 is located in the middle between them. Holder 2 has slit 6 located diametrically to middle pole 3 and preventing closing of coils 7 and 8 phase flow passing by rotor. On outer surface of holder 2 there are four bulges, radial axes of which are located at angle of 45 deg to poles axes. Ring type open yoke 1 is pressed on holder 2 bulges and poles 3 - 5. Yoke is to be open for the purpose, that lines of field force created by phase of coils 7 and 8 do not close round passing by rotor and that stator windings 7 -12 set in their places before yoke is pressed in. Part of yoke, that is located opposite slit 6 between two adjacent to it bulges, is absent. Stator winding coils 7 - 12 are wound separately on forms and inserted in yoke through space of its absent part before magnetic holder 2 and poles 3 - 5 are pressed in yoke. Coils inner sides are located between bulges of magnetic insert and poles. One phase of winding has two coils 7 and 8 located on both sides of middle pole 3 and another phase of winding has two half-phases, each of which has two coils (9 and 10, 11 and 12) located on both side of each of other poles (4 and 5). Coils of phases are connected to each other in the way, that axis of field of phase composed of coils 7 and 8 coincides with axis of poles 4 and 5 ( lines of the field force shown on drawing have horizontal arrows) and axis of field of phase composed of coils 9, 10, 11, 12 coincides with axis of pole 3 and sleet 6 (arrows of the field force lines are vertical). EFFECT: decreased active materials and labour consumption, improved process.

Claims (1)

The invention relates to electrical engineering and can be used in the production of asynchronous and synchronous motors of low power. In the proposed electric motor, a reduction in the consumption of active materials is achieved, with their production the processability is increased and the labor input is reduced. The proposed constructive solution allows you to adjust the shape of the magnetic field distribution curve in the gap due to the choice of structural relationships in the stator magnetic circuit, as a result of which it is possible to improve the engine performance. The stator magnetic circuit of the proposed engine consists of an annular open yoke 1, an annular magnetic cage 2 and three poles 3, 4, 5, laden from plates whose planes are parallel to the radial plane passing through the axis of this pole and the axis of the engine. The yoke 1 and the magnetic holder 2 are burdened in the usual way from sheets whose planes are perpendicular to the axis of the machine. Poles 3 -5 are installed in the grooves made on the outer surface of the cylindrical casing 2. Poles 4 and 5 are located diametrically opposite to each other, pole 3 is located in the middle between them. In the ferrule 2, a slot 6 is made diametrically to the middle pole 3, preventing the closure of the phase flow, consisting of coils 7 and 8, past the rotor. On the outer surface of the casing 2 there are four protrusions, the radial axes of which are located at angles of 45 ^o to the axes of the poles. An annular open yoke 1 is pressed onto the protrusions of the yoke 2 and the poles 3 - 5. The yoke must be open so that the field lines generated by the phase consisting of coils 7 and 8 do not close in a circular past the rotor, as well as for the possibility of winding coils stator 7 - 12 into place until the yoke is pressed in. A part of the yoke against the slot 6 between two adjacent protrusions is missing. Coils 7 - 12 of the stator winding are wound separately on the frames and are threaded into the yoke through the missing part until the magnetic cage 2 and poles 3 - 5 are pressed into it. The inner sides of the coils are located between the protrusions of the magnetic insert and the poles, one phase of the winding includes two coils 7 and 8, located on both sides of the middle pole 3, and the other consists of two half phases, each of which includes two coils 9 and 10, 11 and 12, located on both sides of each of the other two poles 4 and 5. Phase coils are connected between in such a way that the axis of the field of the phase consisting of coils 7 and 8 coincides with the axis of the poles 4 and 5 (the lines of force of this field have horizontal arrows in the figure), and the axis of the field of the phase consisting of coils 9, 10, 11 and 12 , coincides with the axis of the pole 3 and slot 6 (the arrows of the lines of force of this field are vertical).