KR20210150050A - High Speed Stator Core in Motor or Generator - Google Patents

Abstract

The present invention relates to a stator which arranges windings in a radial direction to obtain a space between a laminated iron core of the stator and the windings. The stator can apply short shafts to a high-speed motor or generator to increase high-speed stability of the shafts and increase generator and motor efficiency.

Description

Stator for High Speed Motor and Generator {High Speed Stator Core in Motor or Generator}

The present invention relates to a shape of a stator of a high-speed motor or generator, and relates to securing high-speed safety and increasing efficiency of a motor or generator by reducing the length of a rotor by improving the shape of the stator.

In a high-speed rotating machine, in order to secure shaft stability during high-speed rotation, there must be sufficient separation margin between the rotational speed and the dangerous bending speed of the shaft. In general, in order to secure a separation margin, a method of reducing the length of the shaft or increasing the diameter of the shaft is used. The present invention is a technology that can secure the high-speed stability of the shaft without increasing the shaft diameter by shortening the length of the existing shaft by using the arrangement of copper windings and laminated iron cores when designing and manufacturing the stator of a high-speed motor and generator.

In general, the stator of an electric motor or generator is composed of a laminated iron core laminated with slotted thin plates and a winding in which a copper wire is wound through the slot of the laminated iron core. When a copper winding is wound on a laminated iron core, structurally, bending bundles of copper wires are necessarily made on both sides of the laminated iron core. Due to the space of the copper wire bundle made at this time, it is impossible to mount the bearing housing at both ends of the laminated iron core, so the bearing housing is mounted by retreating the length of the copper wire bundle. As the housing is retracted, the length of the shaft becomes longer, which may cause problems in securing high-speed stability of the shaft.

In the present invention, the slot of the laminated iron core is processed more deeply in order to sufficiently secure a space between the copper wire bundle and the laminated iron core enough to mount the bearing housing. The length of the shaft can be shortened by winding the copper wire between the deeply machined slots to move the copper wire bundle in the radial direction and mounting the bearing housing in the space secured, thereby ensuring high-speed stability of the shaft.

The effects that can be obtained by reducing the shaft length according to the present invention are as follows.

First, the manufacturing cost of motors and generators is reduced. In general, the manufacturing cost of motors and generators has a larger proportion of shafts compared to stator cores. Therefore, the direction of reducing the size of the shaft is much more advantageous in terms of manufacturing.

Second, since it is not necessary to increase the diameter of the shaft to secure the separation margin of the shaft, it is possible to increase the efficiency of the motor and generator by reducing wind loss that may occur during high-speed rotation. In particular, this effect is evident in a high-speed rotating body under high-density conditions.

1 is a view three-dimensionally showing an example of a stator of a general electric motor and generator.
2 is a cross-sectional view showing an example of a stator of a general electric motor and generator.
3 is a view three-dimensionally showing an embodiment of a stator of an electric motor and a generator according to the present invention.
4 is a cross-sectional view showing an embodiment of a stator of an electric motor and a generator according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are views showing the stators of the conventionally manufactured electric motor and generator. As shown in FIG. 2 , it can be seen that the bearing housing 300 is assembled outside the winding bundle 200 .

3 is a view showing a stator in which the winding bundle 200 proposed in the present invention is moved in a radial direction.

4 is a view in which the bearing housing 200 is mounted in a space secured by moving the winding bundle in the radial direction. In FIG. 4, the length of the motor and the generator shaft 420 of the shape according to the present invention is shorter than the length of the shaft 410 of the conventional generator or motor as shown in FIG.

100: laminated iron core
200: winding bundle
300: bearing housing
410: motor and generator shaft of the original shape
420: motor and generator shaft of the shape according to the present invention

Claims (1)

High speed generator or motor stator:
A stator with windings arranged in a radial direction to secure a space between the laminated iron core of the stator and the windings in order to apply the short shaft to a high-speed motor or generator.

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