CN101340134B - High-temperature super conductive linear motor driving device for railway traffic - Google Patents
High-temperature super conductive linear motor driving device for railway traffic Download PDFInfo
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- CN101340134B CN101340134B CN2008101186498A CN200810118649A CN101340134B CN 101340134 B CN101340134 B CN 101340134B CN 2008101186498 A CN2008101186498 A CN 2008101186498A CN 200810118649 A CN200810118649 A CN 200810118649A CN 101340134 B CN101340134 B CN 101340134B
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Abstract
The invention discloses a driving device of a high temperature super-conducting linear motor for rail transit, comprising a controllable variable-frequency power supply and a high temperature super-conducting linear motor; a primary iron core (4) of the high temperature super-conducting linear motor is composed of amorphous alloy slices or of non-magnetic materials directly; a high temperature super-conducting winding is connected with a controllable variable-frequency power supply (13); an air gap (6) is arranged between the bottom plane of the primary iron core and the upper surface of a secondary conductor plate (2); the high temperature super-conducting winding (3) adopts cake structure and a runway section; the winding is arranged in layers and is fixed in the groove of the primary iron core; a primary component is composed of the high temperature super-conducting winding (3) and the primary iron core (4), and is arranged in a cryogenic vessel (9) and fixed on a bogie (5); the secondary conductor plate and a secondary magnetic conductive steel plate (7) are fixed on the sleeper between the two rails. The driving device has the advantages of small volume, light weight, little energy loss and greatly increased reliability and prolonged service life; the driving device can be widely applied to trains, subways, urban metros, etc.
Description
Technical field
The present invention relates to linear motor driver, particularly relate to a kind of high-temperature super conductive linear motor driving device for railway traffic.
Background technology
The traditional cities rail traffic vehicles is to rely on wheel track to draw and brake, because the existence that physics sticks together has limited it adds/and the raising of deceleration performance and climbing capacity; It is relatively poor that also there is the round-the-clock running characteristic in it in addition, and mechanical oscillation and noise are bigger, vehicle lightweight and shortcomings such as the relative difficulty of miniaturization.The line inductance electromotor delivery system is the new city track traffic pattern that adopts line inductance electromotor to drive, and system finishes its support and guiding with wheel track, relies on the electromagnetic force that line inductance electromotor produced to advance.Therefore this system no longer is subjected to the restriction that wheel track sticks together factor, and the performance of traction-braking ability does not rely on environment, has cancelled electric rotating machine and has driven necessary rolling bearing, travelling gear.Vehicle has very strong acceleration, deceleration performance, curving performance and climbing capacity, the running stability height, and the little marshalling of easier realization, high density, automatic operational mode of driving, operation adaptability is better.Existing 5 countries in the whole world totally 10 line inductance electromotors driving subway lines inputs commercial operation at present, the line inductance electromotor delivery system is becoming the preferred mode of urban track traffic gradually.
The line inductance electromotor delivery system is because vehicle-mounted stator and ground rotor are between elasticity (the vertical elasticity of the axle box location) system that is in a linear relative movement, can cause the variation in gap (air gap) between elementary iron core base plane and the secondary conductor plate upper surface inevitably, so kind of air-gap design can not be too little.Add the end effect of line inductance electromotor, stray field is bigger, the low greatest problem that just becomes linear induction motor system of efficient and power factor.
Recently the suitability for industrialized production level of bismuth (Bi) and yttrium (Y) series high-temperature superconductive wire is significantly improved, and has become possibility with high temperature super conductive conductor instead of copper lead.The U.S. has finished the development of the high-temperature superconductor synchronous machine of 36.5MW, and the rotor of motor forms with the coiling of Bi series high-temperature superconductive wire; Japan's super-conductive magnetic suspension test train is that the high-temperature superconducting magnet that lead is made replaces the work of cryogenic magnet also to obtain success with Bi.Because the current capacity of superconductor is than copper conductor more than high hundred times, it is very high that the effective magnetic field of superconducting motor can design, be very suitable for track traffic drives needs air gaps with linear motor work characteristics, even primary coil can adopt hollow-core construction, the loss of motor and noise can descend, can the reducing significantly of volume and weight.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above defective, provide that a kind of electric energy loss is little, the electromagnetism motive force greatly and the high-temperature super conductive linear motor driving device for railway traffic of the high-temperature superconductor winding construction that distributes for the stratiform solid matter of elementary winding.
For achieving the above object technical scheme of the present invention:
A kind of high-temperature super conductive linear motor driving device for railway traffic, comprise a controlled variable frequency power supply and linear electric motors, described controlled variable frequency power supply is provided with variable frequency power supply and controller, described linear electric motors are provided with elementary winding, elementary iron core, secondary conductor plate and secondary magnetic conduction steel plate, add insulating barrier between each elementary winding, and be fixed on by fixed dam in the groove of elementary iron core, described elementary winding links to each other with described controlled variable frequency power supply, has air gap between the upper surface of the base plane of described elementary iron core and secondary conductor plate; Described elementary winding adopts the high-temperature superconductor winding, and these windings adopt cake formula structure, racetrack cross section, and winding adopts layered arrangement in the groove of elementary iron core; Described elementary iron core adopts amorphous alloy film to be formed by stacking, and high-temperature superconductor winding and elementary iron core are formed elementary assembly, and first level assembly places low-temperature (low temperature) vessel, is fixed on the bogie; Described secondary conductor plate is that height is led copper or aluminium sheet, and described secondary magnetic conduction steel plate is the high magnetic permeability steel plate, and secondary conductor plate and secondary magnetic conduction steel plate are fixed on the sleeper between two rails.
High-temperature super conductive linear motor driving device for railway traffic of the present invention also comprises low-temperature (low temperature) vessel and cooling device, and low-temperature (low temperature) vessel communicates with cooling device by cooling fluid turnover pipe, and cooling device is installed ON TRAINS.
Elementary iron core or directly adopt epoxy resin or non-magnetic material to make.
Described air gap be elementary iron core base plane with secondary conductor plate upper surface between not produce the unexpected safe altitude that contacts be 11～15mm.
The AC driving current density of described high-temperature superconductor winding is 50～300A/mm
2
The advantage of high-temperature super conductive linear motor driving device for railway traffic of the present invention is: structurally, the present invention proposes the inner superconduction winding of high-temperature super conductive linear motor and adopts cake formula structure, winding is taked layered arrangement, avoided of the constraint of the relatively poor mechanical performance of high-temperature superconductor, brought into play its superior electromagnetic property to greatest extent the magnet coiling.Drive because Electromagnetic Drive is contactless electromagnetic force, and adopted the high-temperature superconductor electromagnetic system, high-temperature superconductor electromagnet itself is because winding is selected high temperature superconducting materia, and winding resistance levels off to zero, so the electric energy loss of high-temperature superconductor winding own is minimum; Because winding is selected superconductor, so can pass to very large electric current in the winding, therefore also very big of the magnetic field intensity that produces like this, just can produce very large eddy current driving electromagnetic force.Winding is taked stratiform solid matter row, can effectively improve magnetic flux density, improves the actuating force of linear electric motors.With respect to conventional electromagnet, produce the magnetic field of same intensity, the high-temperature superconductor winding volume is little, in light weight, and the loss electric energy is also little, reliability and life-span greatly improve, and can be widely used in the eddy current Driving technique of track motor (as: train, subway, subway, tramcar etc.).
Description of drawings
The front view of Fig. 1 high-temperature super conductive linear motor driving device for railway traffic;
The end view of Fig. 2 high-temperature super conductive linear motor driving device for railway traffic;
The schematic three dimensional views of Fig. 3 high-temperature superconductor winding and elementary core assembly;
The front view of Fig. 4 high-temperature superconductor winding and elementary core assembly;
The vertical view of Fig. 5 high-temperature superconductor winding and elementary core assembly;
The end view of Fig. 6 high-temperature superconductor winding and elementary core assembly;
Fig. 7 superconduction cooling system, high-temperature superconductor winding, elementary iron core and controlled variable frequency power supply connection diagram;
Fixed dam 1, secondary conductor plate 2, high-temperature superconductor winding 3, elementary iron core 4, train bogie 5, air gap 6, secondary magnetic conduction steel plate 7, cooling fluid inlet pipe 8, low-temperature (low temperature) vessel 9, connecting rod 10, insulating barrier 11, cooling device 12, controlled variable frequency power supply 13, cooling fluid go out pipe 14.
Embodiment
The present invention is described in detail with reference to accompanying drawing below in conjunction with embodiment.
With reference to Fig. 7, a kind of high-temperature super conductive linear motor driving device for railway traffic, comprise a controlled variable frequency power supply 13 and a high-temperature super conductive linear motor, high-temperature super conductive linear motor is made up of first level assembly, secondary conductor plate 2 and secondary magnetic conduction steel plate 7 and superconduction cooling system (cooling fluid inlet pipe 8, low-temperature (low temperature) vessel 9, cooling device 12 and cooling fluid go out pipe 14).
With reference to Fig. 1-5, high-temperature superconductor winding 3 adopts cake formula structure, racetrack cross section, and the winding stratiform is arranged in the groove of elementary iron core 4, adds insulating barrier 11 between each elementary winding, and fixed dam 1 is fixed on high-temperature superconductor winding 3 in the elementary iron core 4; High-temperature superconductor winding 3 and elementary iron core 4 are formed level assembly just, and first level assembly places low-temperature (low temperature) vessel 9, is fixed on the bogie by connecting rod 10.
The core structure that high-temperature superconductor winding 3 uses is identical with the core construction that conventional electromagnet uses, but has adopted amorphous alloy material.High-temperature superconductor winding 3 leads use superconductor bismuth 2223 (Bi2223) or yttrium barium copper oxide (YBCO) band to make (or other high temperature superconducting materia).
With reference to figure 3, provide the schematic three dimensional views of high-temperature superconductor winding and elementary core assembly, visible high-temperature superconductor winding adopts cake formula structure, racetrack cross section; the winding mid portion is a straight line; two ends are semi-circular structure, and its radius need be greater than 2.5cm, and purpose is in order to protect superconductor not to be damaged.The high-temperature superconductor winding adopts stratiform solid matter mode, improves magnetic flux density, thereby improves actuating force.
With reference to Fig. 1 and 2, not producing the unexpected safe altitude that contacts between elementary iron core 4 base plane and secondary conductor plate 2 upper surfaces is air gap 6, highly is 11mm.
Air gap 6 is determined according to the situation test of actual track and train, make air gap height little but consider that again the base plane that prevents elementary iron core 4 in the actual motion contacts with the secondary conductor plate as far as possible, adopt the base plane of elementary iron core 4 not produce the unexpected safe altitude that contacts with 7 of secondary magnetic conduction steel plates, the optimal design value is 11～15mm.The width of the width of air gap and secondary magnetic conduction steel plate 7 is close; Then according to the actuating force adjustment of concrete unit superconduction eddy current drive unit, air gap length is long more for the length of air-gap, and actuating force is big more.
With reference to Fig. 7, controlled variable frequency power supply 13 is provided with variable frequency power supply and controller, and high-temperature superconductor winding 3 is connected with controlled variable frequency power supply 13.Controlled variable frequency power supply 13 is also settled ON TRAINS.The controlled variable frequency power supply that makes the high-temperature superconductor winding be in the superconduction cooling system of superconducting state and how produce high-temperature superconductor winding alternating current all adopts present known equipment.
With reference to Fig. 1,2 and 7, be in superconducting state in order to make the high-temperature superconductor winding 3 that places low-temperature (low temperature) vessel 9, high-temperature super conductive linear motor driving device for railway traffic is provided with cooling device 12.High-temperature superconductor winding 3 places the inner low-temperature (low temperature) vessel 9 of liquid nitrogen that be, and low-temperature (low temperature) vessel 9 and cooling device 12 are connected with 14 by cooling fluid turnover pipe 8, make the liquid nitrogen circulation, are in superconducting state with maintenance high-temperature superconductor winding 3 always.Cooling device 12 is settled ON TRAINS.
Below the course of work of high-temperature super conductive linear motor driving device for railway traffic of the present invention is explained.
When static train need drive, pass to three-phase alternating current in the high-temperature superconductor winding 3, form closed magnetic circuit through elementary iron core 4, secondary conductor plate 2 and secondary magnetic conduction steel plate 7 and air gap 6.In secondary conductor plate 2, produce eddy current, like this, make launch train at the electromagnetic field of high-temperature superconductor winding 3 and 4 formation of elementary iron core and the driving electromagnetic force that the eddy current on the secondary conductor plate 2 produces.
Claims (4)
1. a high-temperature super conductive linear motor driving device for railway traffic comprises a controlled variable frequency power supply (13) and linear electric motors; Described controlled variable frequency power supply (13) is provided with variable frequency power supply and controller; Described linear electric motors are provided with elementary winding, elementary iron core (4), secondary conductor plate (2) and secondary magnetic conduction steel plate (7), add insulating barrier (11) between each elementary winding, and be fixed in the groove of elementary iron core (4) by fixed dam (1), described elementary winding links to each other with described controlled variable frequency power supply (13), has air gap (6) between the upper surface of the base plane of described elementary iron core (4) and secondary conductor plate (2); It is characterized in that: described elementary winding adopts high-temperature superconductor winding (3), and these windings adopt cake formula structure, racetrack cross section, and winding adopts layered arrangement in the groove of elementary iron core (4); Described elementary iron core (4) adopts amorphous alloy film to be formed by stacking, and high-temperature superconductor winding (3) and elementary iron core (4) are formed level assembly just, and first level assembly places low-temperature (low temperature) vessel (9), is fixed on the bogie (5); Secondary conductor plate (2) and secondary magnetic conduction steel plate (7) are fixed on the sleeper between two rails.
2. high-temperature super conductive linear motor driving device for railway traffic according to claim 1 is characterized in that: described low-temperature (low temperature) vessel (9) communicates with cooling device (12) by cooling fluid turnover pipe.
3. high-temperature super conductive linear motor driving device for railway traffic according to claim 1 is characterized in that: described air gap (6) is 11～15mm for not producing the unexpected safe altitude that contacts between elementary iron core (4) base plane and secondary conductor plate (2) upper surface.
4. high-temperature super conductive linear motor driving device for railway traffic according to claim 1 is characterized in that: the AC driving current density of described high-temperature superconductor winding (3) is 50～300A/mm
2
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101186498A CN101340134B (en) | 2008-08-21 | 2008-08-21 | High-temperature super conductive linear motor driving device for railway traffic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101186498A CN101340134B (en) | 2008-08-21 | 2008-08-21 | High-temperature super conductive linear motor driving device for railway traffic |
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| CN101340134A CN101340134A (en) | 2009-01-07 |
| CN101340134B true CN101340134B (en) | 2011-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020043406A1 (en) * | 2018-08-29 | 2020-03-05 | Siemens Gamesa Renewable Energy A/S | Coil layout for a generator having tape conductors |
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| CN101572475B (en) * | 2009-06-04 | 2011-04-20 | 哈尔滨泰富实业有限公司 | Forced air cooling high thrust flat three-phase linear asynchronous motor |
| CN102025315B (en) * | 2010-12-15 | 2012-02-01 | 北京交通大学 | Separation cooling type high-temperature superconducting linear motor driving device for rail transit |
| CN102263474B (en) * | 2011-05-27 | 2013-01-23 | 北京交通大学 | High-temperature superconducting linear motor driving device for non-iron-core-type track transportation |
| CN102223052B (en) * | 2011-06-01 | 2013-03-27 | 哈尔滨工业大学 | Multi-DOF (degree of freedom) short-stroke planar motor |
| CN105915017A (en) * | 2016-04-15 | 2016-08-31 | 西南交通大学 | Linear traction motor of urban rail |
| CN107968546B (en) * | 2017-12-12 | 2019-10-29 | 曲阜师范大学 | A kind of transverse magnetic flux high-temperature superconducting magnetic levitation linear motor for rail traffic |
| EP4052275A1 (en) * | 2020-01-28 | 2022-09-07 | Siemens Gamesa Renewable Energy A/S | Coil layout for a generator having tape conductors |
| CN114696565A (en) * | 2020-12-30 | 2022-07-01 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Linear motor and magnetic suspension traffic system |
| CN113199944B (en) * | 2021-06-17 | 2022-03-15 | 西南交通大学 | Force transmission structure of superconducting electric suspension magnet |
| CN115833524A (en) * | 2023-01-09 | 2023-03-21 | 南京邮电大学 | Linear motor based on superconducting cable excitation |
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2008
- 2008-08-21 CN CN2008101186498A patent/CN101340134B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020043406A1 (en) * | 2018-08-29 | 2020-03-05 | Siemens Gamesa Renewable Energy A/S | Coil layout for a generator having tape conductors |
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