KR20150025818A - A carbon fiber fabric coupling in A railway car direct drive motor - Google Patents

Abstract

The present invention includes a direct coupled traction motor for electric vehicle including a coupling forming a carbon fiber. The present invention includes: a stator which is fixed on a trolley; a rotor which includes a permanent magnet and is combined with a vehicle shaft; a frame which encloses the stator and the rotor; a housing which is combined with both ends of the frame; and a coupling which is combined with the vehicle shaft, reduces vibration from a rail, and is made with the carbon fiber to reduce a weight, reduce initiative, improve response characteristic, perform a smooth flux path, and improve heat emission. It is important for the stable combination structure of the frame and the housing to prevent a safety accident and improve the cooling characteristic of the traction motor. The present invention has an effect of reducing the entire weight and improving response speed by forming the material of coupling of the traction motor with the carbon fiber.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a direct drive type traction motor for a train including a coupling made of a carbon fiber,

More particularly, the present invention relates to an axially coupled coupling of a direct drive type traction motor for a motor vehicle, and more particularly, to a motorcycle comprising a coupling for reducing vibration transmitted from a rail is made of carbon fiber to reduce the weight of the traction motor, And more particularly to a direct-drive-type traction motor for a train including a coupling made of carbon fiber for improving the speed.

In general, a traction motor for a railway vehicle is classified into an indirect drive type traction motor that drives a drive shaft of a wheel through a power transmission device and a direct drive type traction motor that directly drives a drive shaft coupled to a drive shaft of a wheel.

In this case, a direct-drive-type traction motor for a railway car is a motor that is installed in a truck and drives a drive shaft of a wheel. The stator is fixed to a truck as shown in Fig. 1, and a permanent magnet A coupling integrated with a wheel and a wheel integrated with the shaft of the direct drive traction motor, a coupling for reducing the vibration transmitted from the rail, a bearing, and a carriage on which the traction motor is mounted, And a structure in which a permanent magnet is embedded in an outer peripheral surface and a coil is arranged in an inner peripheral surface of the stator.

Since the direct-drive-type traction motor does not have a gear that transmits the rotation speed of the traction motor to the axle but directly drives the motor, the motor is integrated with the axle so that the deceleration device is unnecessary, , The torque of the direct-drive-type traction motor constituting the induction motor needs about 7 times as much as that of the conventional induction motor. Therefore, the torque applied to the shaft of the induction motor is larger than that of the other motors.

Therefore, it is necessary to endure the high torque pressure, and to have low vibration and low noise. Also, it is necessary to efficiently remove the heat generated by the high-speed rotation and the heat generated from the stator winding. In this case, research and development of materials and structures for satisfying the above requirements have been actively conducted.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and its object is to provide a direct-drive-type traction motor for a railway vehicle which is lightweight and which reduces the weight of a traction motor, The present invention relates to a direct-drive-type traction motor for a train,

According to an aspect of the present invention, there is provided a stator comprising: a stator fixed to a bogie; A rotor including a permanent magnet and coupled to an axle; A frame surrounding the stator and the rotor; A housing coupled at both ends of the frame; A coupling made of a carbon fiber material so as to be combined with the axle to reduce vibration from the rail and to reduce weight, reduce initialization, improve response characteristics, smooth flux path structure, and improve heat emission; And a control unit.

Further, the coupling is characterized in that a synthetic resin resin having a high thermal conductivity is applied to remove heat.

Further, the synthetic resin includes a carbon powder as a magnetic material for preventing leakage flux of the permanent magnet.

According to the direct drive type traction motor for a train including the coupling made of the carbon fiber of the present invention, the structure of the frame and the stable coupling structure of the coupling and the weight reduction are very important in prevention of safety accidents and cooling characteristics of the traction motor, In this connection, the material of the coupling of the traction motor is made of carbon fiber, so that the weight of the traction motor as a whole is reduced and the response speed is improved.

1 is a schematic view of a direct drive type traction motor for a train.
2 is a cross-sectional perspective view of a rotor of a direct drive traction motor;
3 is an exploded perspective view of a rotor of a direct drive type traction motor.
4 is a perspective view of a stator of a direct drive type traction motor.
5 is a perspective view of a direct drive type traction motor.
6 is a perspective view of a coupling according to the present invention;

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

As described above, the direct-drive-type traction motor for a railway vehicle includes a stator fixed to a bogie as an electric motor for driving a drive shaft of a wheel, a rotor including a permanent magnet and fitted to an axle, A wheel integrated with a rotor and a shaft, and a truck mounted with an axle, a bearing, and a traction motor.

In this case, as shown in FIGS. 2 and 3, the rotor 100 is formed by fixing a single rotor core 110 having an annular shape and having a predetermined thickness.

In the rotor core 110, a magnet hole 111 through which a permanent magnet can be inserted is formed at a predetermined depth along the outer circumferential surface.

In this case, the permanent magnet 120 is inserted into the magnet hole 111 formed in the outer circumferential surface of the rotor core 110, and the permanent magnet 120 is positioned inside the rotor core 110, In addition, it is possible to increase the durability of the permanent magnet 120, and the possibility of potentiating the permanent magnet 120 due to a rise in temperature can be reduced since it is not directly affected by the heat generated in the stator.

A hollow is formed in the center of the rotor core 110, and the axle 10 is engaged and fixed together with the axle 10 and rotated.

4, the stator surrounds the outside of the rotor, generates a magnetic force by receiving current, and generates a magnetic force of the rotor 100 including the permanent magnet 120, So that torque can be transmitted to the traction motor as a whole.

5 to 6, the housing 300 generally includes a coupling 500 coupled to both ends of a frame 400 that surrounds the outside of the rotor of the traction motor and coupled to rotate with the wheel, And an improvement in the cooling performance.

The direct drive system using the axle 10 as the axis of the traction motor may cause problems in terms of durability of the traction motor. Accordingly, the axle 10 can be coupled with the coupling 500 to effectively reduce vibration from the rail. However, if the material of the coupling 500 is used as a cast steel, the total weight is increased.

Accordingly, as shown in FIG. 6, the direct-coupled-drive traction motor for a train including a coupling made of carbon fiber according to the present invention has a strength of 10 times stronger than that of steel but a weight of 1/4 Carbon fiber material is used.

In this case, since the lightweight carbon fiber material is used for the coupling 500, the overall weight of the traction motor including the coupling 500 is reduced more than the structure used conventionally as a cast steel, thereby improving acceleration / deceleration performance of the traction motor The rotational response characteristic is improved.

In one embodiment, the coupling 500 is coated with a resin having a high thermal conductivity, followed by post-treatment such as heating or ultraviolet ray irradiation, so that high durability can be maintained by reducing vibration and frequent shocks even when rotating at high speed And it is possible to prevent generation of spatial harmonics generated from the flow of air, thereby suppressing noise generation.

In addition, carbon powder, which is a magnetic substance, is applied to the coupling 500 by the synthetic resin as a preventive measure against leaked magnetic flux, so that the flow of magnetic flux from the permanent magnet 120 can be made flexible, .

The embodiments of the direct drive traction motor for a train including the coupling made of the carbon fibers of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications And other equivalent embodiments are possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: Axle 100: Rotor
110: rotor core 111: magnetic ball
120: permanent magnet 200: stator
300: housing 400: frame
500: Coupling

Claims (3)

A stator 200 fixed to the bogie;
A rotor 100 including a permanent magnet 120 and coupled with the axle 10;
A frame 400 surrounding the stator 200 and the rotor 100;
A housing 300 coupled at both ends of the frame 400;
(500) made of carbon fiber material so as to be combined with the axle (10) to reduce vibration from the rail and to reduce weight, reduce initialization, improve response characteristics, smooth flux path structure, ;
Wherein the direct-drive-type traction motor for a train includes a coupling made of carbon fibers. The method of claim 2,
The coupling (500)
Characterized in that a resin having a high thermal conductivity is applied to remove heat, and a coupling made of carbon fibers is directly applied to the traction motor. The method of claim 3,
Wherein the synthetic resin includes carbon powder as a magnetic substance for preventing leakage flux of the permanent magnet (120). The direct drive traction motor for a train including a coupling made of carbon fibers.

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