CN112003441B - Linear motor system for magnetic-levitation train - Google Patents
Linear motor system for magnetic-levitation train Download PDFInfo
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- CN112003441B CN112003441B CN202010913160.0A CN202010913160A CN112003441B CN 112003441 B CN112003441 B CN 112003441B CN 202010913160 A CN202010913160 A CN 202010913160A CN 112003441 B CN112003441 B CN 112003441B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Linear Motors (AREA)
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
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 a linear motor stator 1, a linear motor rotor 2, a magnetic-levitation train body 3, a vehicle-mounted suspension device 4, a ground suspension device 5, a track bed 10 and the like, and is shown in figure 1.
The double-sided linear 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 linear motor stator core 6, a left linear motor stator winding 7, a right linear motor stator core 8 and a right linear motor stator winding 9, as shown in fig. 2.
A groove 11 is formed in the middle of a track bed 10, and a linear motor stator 1 is continuously paved on two sides of the groove 11 along a line, as shown in figure 1.
The motor stator cores 6 and 8 are formed by stacking silicon steel sheets 21, and the silicon steel sheets 21 have a tooth-groove structure, as shown in fig. 3 and 4.
The motor stator windings 7 and 9 are formed by winding enameled aluminum wires or copper wires, and the windings 7 and 9 are embedded in the slots of the iron cores 6 and 8 of the motor stator 1 by winding coils 22.
The linear motor rotor 2 is arranged in the middle of the bottom of a magnetic suspension train body 3 and is arranged in the middle of the bilateral linear 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 the rotor 2 from being worn in case of accidents. The thickness of the linear motor rotor is 10 mm-50 mm, and preferably 20 mm.
The magnetic suspension train 3 is positioned at the top of the linear motor rotor 2, and the linear motor stator 1 and the linear motor rotor 2 can realize non-contact driving in the running process of the magnetic suspension train 3. The gap between the surface of the linear motor mover 2 and the surface of the single-side stator core is 5mm to 45mm, preferably 15 mm.
The ground suspension device 5 is arranged on the upper portion of the track bed 10 and continuously laid along the double tracks of the line, and the vehicle-mounted magnetic suspension device 4 is arranged at the bottom of the magnetic suspension train 3 and matched with the ground suspension device 5 to realize the suspension function of the train 3.
In the invention, the vertical central position of the linear motor rotor 2 is 5-200 mm higher than the vertical central positions of the linear motor stator iron cores 6 and 8, and the position offset can generate eddy with stronger density at the lower side position in the linear motor rotor 2, so that the linear 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 the linear motor rotor 2 is flush with the lower end surfaces of the linear motor stator cores 6 and 8.
The eddy current generated in the double-sided linear induction motor rotor 2 of the invention interacts with the magnetic fields of the stators 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 (8)
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, the linear motor rotor is made of high-conductivity materials, wear-resistant paint is sprayed on the surface of the linear motor rotor, the thickness of the linear motor rotor is 10-50 mm, 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 suspension device is arranged at the bottom of the magnetic suspension train body and is 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 20 mm.
3. 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.
4. The linear motor system for a maglev train of claim 3, wherein: the clearance between the surface of the linear motor rotor and the surface of the linear motor stator iron core is 15 mm.
5. 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.
6. 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.
7. 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.
8. The linear motor system for a maglev train of claim 7, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913160.0A CN112003441B (en) | 2020-09-03 | 2020-09-03 | Linear motor system for magnetic-levitation train |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913160.0A CN112003441B (en) | 2020-09-03 | 2020-09-03 | Linear motor system for magnetic-levitation train |
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| CN112003441A CN112003441A (en) | 2020-11-27 |
| CN112003441B true CN112003441B (en) | 2021-10-26 |
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| CN112003441A (en) | 2020-11-27 |
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