CN112003441A - Linear motor system for magnetic-levitation train - Google Patents

Abstract

The invention discloses a linear motor system for a maglev train, which comprises a linear motor stator, a linear motor rotor, a maglev train body, a vehicle-mounted suspension device, a ground suspension device and a track bed, wherein: the linear motor stators are symmetrically arranged on two sides of a groove formed in the middle of the ballast bed; the linear motor rotor is arranged in the middle of the bottom of the magnetic suspension train body; the linear motor stators are continuously laid along a line, and the linear motor rotor is positioned in the middle of the bilateral linear motor stators; the linear motor stator is composed of an iron core and a winding, and the vertical central position of the linear motor rotor is higher than that of the linear motor stator iron core. The linear motor can provide suspension force and guiding force for the magnetic-levitation train at the same time, and the stability of a suspension system is enhanced. The linear motor system has the advantages of simple structure, light weight of the rotor, energy conservation, high efficiency and no pollution, and can be used as a preferred driving system of a maglev train.

Description

Linear motor system for magnetic-levitation train

Technical Field

The invention discloses a linear motor system for a maglev train, which is a magnetic suspension driving system and belongs to the important components of a rail transit system.

Background

The magnetic suspension train as new type rail transportation means realizes non-contact suspension and guidance between the train and the rail by electromagnetic attraction or electromagnetic repulsion, and then drives the train to run at high speed by utilizing the electromagnetic force generated by the linear motor. The linear motor system is a key technology of the magnetic-levitation train, and in practical application, the electromagnetic force generated by the existing linear motor is easy to disturb the levitation guidance system of the magnetic-levitation train, so that the running performance of the magnetic-levitation train is influenced.

Linear motors applied to existing maglev trains can be divided into long-stator linear motors and short-stator linear motors according to the length relationship between stators and rotors, and the motors are usually in a single-sided structure. At present, single-side short-stator linear induction motors are adopted in medium and low-speed magnetic suspension trains at home and abroad, and single-side long-stator linear synchronous motors are adopted in high-speed magnetic suspension trains. The unilateral short-stator linear induction motor has a simple structure and small normal force, but the vehicle-mounted system has heavy weight and high suspension energy consumption; although the single-side long-stator linear synchronous motor has high driving efficiency, the normal force is large, and the structure and the control system are relatively complex.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a linear motor system for a maglev train, belonging to a double-sided long-stator linear induction motor system. The linear motor stator is laid continuously along the line, the motor rotor is installed at the lower position in the middle of the maglev train, and the linear motor rotor has the advantages of simple structure, light weight, high driving efficiency, simple control system and the like. Simultaneously, linear electric motor has automatic function placed in the middle, and when providing the guiding force for the maglev train, linear electric motor still can provide the levitation force for the maglev train, further improves entire system's suspension performance.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a linear electric motor system for maglev train, includes linear electric motor stator, linear electric motor active cell, maglev train automobile body, on-vehicle suspending device, ground suspending device and railway roadbed, wherein: the linear motor stators are symmetrically arranged on two sides of a groove formed in the middle of the ballast bed; the linear motor rotor is arranged in the middle of the bottom of the magnetic suspension train body; the linear motor stators are continuously laid along a line, and the linear motor rotor is positioned in the middle of the bilateral linear motor stators; the linear motor stator is composed of an iron core and a winding, and the vertical central position of the linear motor rotor is higher than that of the linear motor stator iron core; the ground suspension device is arranged on the upper part of the track bed and is continuously laid along the double tracks of the track, and the vehicle-mounted magnetic suspension device is arranged at the bottom of the magnetic suspension train body and matched with the ground suspension device.

Compared with the prior art, the invention has the following positive effects:

the vertical central position of the rotor of the linear motor is higher than that of the stator core of the linear motor, and the linear motor can provide suspension force and guiding force for a magnetic suspension train simultaneously, so that the stability of a suspension system is enhanced.

The linear motor system has the advantages of simple structure, light weight of the rotor, energy conservation, high efficiency and no pollution, and can be used as a preferred driving system of a maglev train.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the system of the present invention.

Fig. 2 is a front view of the linear motor of the present invention.

Fig. 3 is a perspective view of the linear motor of the present invention.

Fig. 4 is an axial perspective view of a silicon steel sheet of a stator core of the motor of the present invention.

Detailed Description

The linear motor system for the magnetic-levitation train mainly comprises alinear motor stator 1, alinear motor rotor 2, a magnetic-levitation train body 3, a vehicle-mountedsuspension device 4, aground suspension device 5, atrack bed 10 and the like, and is shown in figure 1.

The double-sidedlinear motor stator 1 is positioned at the middle lower part of the system, is in a left and right bilateral symmetry structure, and comprises a left linearmotor stator core 6, a left linearmotor stator winding 7, a right linearmotor stator core 8 and a right linearmotor stator winding 9, as shown in fig. 2.

Agroove 11 is formed in the middle of atrack bed 10, and alinear motor stator 1 is continuously paved on two sides of thegroove 11 along a line, as shown in figure 1.

Themotor stator cores 6 and 8 are formed by stackingsilicon steel sheets 21, and thesilicon steel sheets 21 have a tooth-groove structure, as shown in fig. 3 and 4.

Themotor stator windings 7 and 9 are formed by winding enameled aluminum wires or copper wires, and thewindings 7 and 9 are embedded in the slots of theiron cores 6 and 8 of themotor stator 1 by windingcoils 22.

Thelinear motor rotor 2 is arranged in the middle of the bottom of a magneticsuspension train body 3 and is arranged in the middle of the bilaterallinear motor stator 1; the rotor is made of high-conductivity materials such as aluminum plates or copper plates, and the surface of the rotor is sprayed with wear-resistant paint for preventing therotor 2 from being worn in case of accidents. The thickness of the linear motor rotor is 10 mm-50 mm, and preferably 20 mm.

Themagnetic suspension train 3 is positioned at the top of thelinear motor rotor 2, and thelinear motor stator 1 and thelinear motor rotor 2 can realize non-contact driving in the running process of themagnetic suspension train 3. The gap between the surface of thelinear motor mover 2 and the surface of the single-side stator core is 5mm to 45mm, preferably 15 mm.

Theground suspension device 5 is arranged on the upper portion of thetrack bed 10 and continuously laid along the double tracks of the line, and the vehicle-mountedmagnetic suspension device 4 is arranged at the bottom of themagnetic suspension train 3 and matched with theground suspension device 5 to realize the suspension function of thetrain 3.

In the invention, the vertical central position of thelinear motor rotor 2 is 5-200 mm higher than the vertical central positions of the linear motorstator iron cores 6 and 8, and the position offset can generate eddy with stronger density at the lower side position in thelinear motor rotor 2, so that thelinear motor rotor 2 generates vertical upward electromagnetic buoyancy, and the suspension performance of the suspension system of the magnetic suspension train is further improved.

The invention preferably adopts a structural mode that the lower end surface of thelinear motor rotor 2 is flush with the lower end surfaces of the linearmotor stator cores 6 and 8.

The eddy current generated in the double-sided linearinduction motor rotor 2 of the invention interacts with the magnetic fields of thestators 1 at the left and right sides and is represented as repulsive force, therefore, the linear motor has the function of automatic centering, and can provide the guiding force for the maglev train and simultaneously provide the levitation force for the maglev train.

The linear motor system can be used for low-speed and medium-speed maglev trains, and is also suitable for high-speed and ultrahigh-speed maglev trains, and the speed covers the full-speed range of 5 km/h-1000 km/h.

Claims (10)

1. The utility model provides a linear electric motor system for maglev train which characterized in that: including linear electric motor stator, linear electric motor active cell, magnetic levitation train body, on-vehicle suspending device, ground suspending device and railway roadbed, wherein: the linear motor stators are symmetrically arranged on two sides of a groove formed in the middle of the ballast bed; the linear motor rotor is arranged in the middle of the bottom of the magnetic suspension train body; the linear motor stators are continuously laid along a line, and the linear motor rotor is positioned in the middle of the bilateral linear motor stators; the linear motor stator is composed of an iron core and a winding, and the vertical central position of the linear motor rotor is higher than that of the linear motor stator iron core; the ground suspension device is arranged on the upper part of the track bed and is continuously laid along the double tracks of the track, and the vehicle-mounted magnetic suspension device is arranged at the bottom of the magnetic suspension train body and matched with the ground suspension device.

2. The linear motor system for a maglev train of claim 1, wherein: the thickness of the linear motor rotor is 10 mm-50 mm.

3. The linear motor system for a maglev train of claim 2, wherein: the thickness of the linear motor rotor is 20 mm.

4. The linear motor system for a maglev train of claim 1, wherein: the linear motor rotor is made of high-conductivity materials, and wear-resistant paint is sprayed on the surface of the linear motor rotor.

5. The linear motor system for a maglev train of claim 1, wherein: the gap between the surface of the linear motor rotor and the surface of the linear motor stator core is 5-45 mm.

6. The linear motor system for a maglev train of claim 5, wherein: the clearance between the surface of the linear motor rotor and the surface of the linear motor stator iron core is 15 mm.

7. The linear motor system for a maglev train of claim 1, wherein: the vertical central position of the linear motor rotor is 5-200 mm higher than the vertical central position of the linear motor stator core.

8. The linear motor system for a maglev train of claim 1, wherein: the lower end face of the linear motor rotor is flush with the lower end face of the linear motor stator core.

9. The linear motor system for a maglev train of claim 1, wherein: the linear motor stator core is formed by stacking silicon steel sheets with a tooth space type structure.

10. The linear motor system for a maglev train of claim 9, wherein: the linear motor stator winding is formed by winding an enameled aluminum wire or a copper wire into a formed coil which is embedded in a tooth socket of the stator core.

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