RU1815738C - Magnetic core of salient pole stator of single-phase electric motor - Google Patents

Abstract

Usage: in electric machines of small and medium power with a reactive stator, used mainly in electrical appliances. SUMMARY OF THE INVENTION: A magnetic core of an out-of-pole stator of a single-phase electric motor comprises a lined core of ferromagnetic plates and a magnetic insert installed therein with sections of different magnetic conductivity. The latter is made H-shaped, with a hole under the rotor located in the crossbar of the insert. The grooved core is located in the recesses. This makes it possible to increase the manufacturability with a vertical arrangement of the axis of the engine. Zil.

Description

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The invention relates to electrical engineering and can be used in the manufacture of two-pole low-power electric motors with a jet stator, intended mainly for household appliances.

The aim of the invention is to increase the manufacturability of the manufacture of the stator magnetic wire of a single-phase out-of-pole motor with a vertical axis.

Fig. 1 shows a general view of the magnetic wire assembly; in FIG. 2 - H-shaped continuous insert of the magnetic circuit with an uneven hole for the rotor; in FIG. 3 - ferromagnetic plate of the magnetic core.

The magnetic circuit is made as follows. In the lined core 1 of the U-shaped plates from the open side

an H-shaped magnetic insert 2 is installed, the ends of the lined core 1 being located in the recesses of the H-shaped insert 2. A hole 3 for the rotor is made in the crossbar of the insert 2, having radial sizes to form sections of different magnetic conductivity. An insert 4 is made in insert 2 for mounting the bearing shields.

The stator stack is bursted from ferromagnetic plates. When stamping plates of this shape, non-waste and low-waste cutting of ferromagnetic billets can be successfully applied. Simply enough, compared with the prototype, stator coils are wound around the frames onto the burnt bag. As a result, the initial fixation of the plates occurs. On the pressed core core00

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an H-shaped continuous insert 2, which is obtained by stamping. This part of the magnetic circuit has an uneven air gap under the rotor 3, which leads to the formation of various magnetic resistances along the radial axis into the bore. Thus, the core acquires the properties of an off-pole magnetic circuit.

The ends of the ferromagnetic plates are located in the recesses of the H-shaped insert. The dimensions of the HL P recesses are determined by the size, number and thickness of the plates 1.

Holes 4 are intended for mounting bearing shields. At the same time, an appropriate choice of the sizes of these holes and their location relative to the hole for the rotor 3 makes it possible to control the passage of magnetic flux from the stator to the rotor and thereby obtain the required starting and operating characteristics of the motor. The size of the hole for the rotor 3 corresponds to the axial length of the rotor. The dimensions of the magnetic circuit assembly a x b x h of FIG. 1 are determined mainly by the geometry and number of laminated core plates.

The present invention can be used in non-pole electric motors, which are used in household appliances, where necessary

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low cost of manufacture, assembly and does not require high energy performance. The greatest economic effect is obtained for engines in which the plane of lamination of the package plates coincides with the axis of rotation of the rotor.

The proposed magnetic circuit makes it possible to simplify the manufacturing process of charged cores, since there is no need to use dies of complex shape, the use of fixing screws and the number of technological operations is significantly reduced, the content of which is greatly simplified.

Claims (1)

SUMMARY OF THE INVENTION A magnetic circuit of an out-of-pole stator of a single-phase electric motor, comprising a lined core of open ferromagnetic plates and a magnetic insert installed therein with sections of different magnetic conductivity, in which a hole for the rotor is made, characterized in that, in order to increase manufacturability with the vertical axis of the motor, the insert is H-shaped, with the hole for the rotor located in the crossbar, and the ends of the lined core in the cavities formed by the the claw and the sides of the H-shaped insert. / Fm. 3