CN105196880A - AC/DC (alternating current/direct current) hybrid excitation rail eddy-current brake - Google Patents
AC/DC (alternating current/direct current) hybrid excitation rail eddy-current brake Download PDFInfo
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- CN105196880A CN105196880A CN201510560712.3A CN201510560712A CN105196880A CN 105196880 A CN105196880 A CN 105196880A CN 201510560712 A CN201510560712 A CN 201510560712A CN 105196880 A CN105196880 A CN 105196880A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses an AC/DC hybrid excitation rail eddy-current brake, relates to the field of motors and aims to solve the problems that the temperature of steel rails is increased, parameters such as the electric conductivity, magnetic inductivity and the like change and the service life of the steel rails is shortened due to large amount of heat generated by eddy current on the steel rails during train braking of the conventional DC excitation rail eddy-current braking technology, a high-capacity excitation source is needed to be added for rail eddy-current braking, electric energy is consumed during braking, danger of braking failure exists in case of power failure or insufficient electric power, the braking force is small at a low speed and the applicable train speed range is small. An AC output end of an excitation control inverter is connected with a control winding of an AC excitation eddy-current braking unit, an excitation capacitor group is connected in parallel to an output end of a power winding of the AC excitation eddy-current braking unit, the output end of the power winding is connected with an AC input end of a multi-phase rectifier, and two ends of an excitation winding of a DC excitation eddy-current braking unit are connected to an output end of the multi-phase rectifier. The AC/DC hybrid excitation rail eddy-current brake can be used for braking of high-speed trains.
Description
Technical field
The present invention relates to alternating current-direct current mixed excitation High-Speed Eddy Braking device.Belong to machine field.
Background technology
Train high speed relates to driving and braking two key issues of train.Wherein the braking of high speed train should give enough attention especially, and the basic ideas of high-speed train braking are the same with the train braking under current conventional speeds, namely consume the kinetic energy of Train motion, make train deceleration or stop.Because the kinetic energy of high speed train is more much larger than ordinary train, and the adhesion factor at a high speed between lower wheel track and the friction coefficient between brake shoe and driving wheel reduce all greatly, therefore high speed train must adopt new brake system.According to existing analysis, the braking of high speed train adopts regenerative brake, eddy current brake is master, friction braking is supplementary associated braking system, is a kind of economic benefit and the good brake system of technical performance.Eddy current brake has rotating vortex to brake and High-Speed Eddy Braking two kinds of forms.Wherein High-Speed Eddy Braking belongs to non-adhesion braking, and its advantage is that braking characteristics is smooth, and braking force is large when train speed is within the scope of 80 ~ 400km/h.Above-mentioned two kinds of eddy current brake forms all have one group of electromagnet and have electromagnetic induction body---the rail of relative motion, by electromagnetic induction, make the kinetic transformation of train be eddy current in rail, and dissipate towards periphery in the form of heat, reach the object of braking with this.
Fig. 4 is existing DC excitation High-Speed Eddy Braking schematic diagram.High-Speed Eddy Braking device installs electromagnet between the wheel of bogie truck both sides, often organizes electromagnet length about 1200 ~ 2000mm; Electromagnetic induction body made by rail, and alternately configuration is done along the bearing of trend of rail in N, S pole passing into the electromagnet of DC current excitation.The number of magnetic poles of electromagnet is generally selected in 4 ~ 20 scopes.The magnetic pole pole-face of exciting electromagnet iron and the vertical distance of rail surface are not less than 6mm.
But there are the following problems for current DC excitation High-Speed Eddy Braking technology: during train braking, the eddy current on rail produces a large amount of heat, make the temperature of rail increase, therefore its parameter such as conductivity and permeability all will change.Eddy current brake power is relevant with magneto-resistivity with the electrical resistivity of rail, and therefore rail temperature rise certainly will impact eddy current brake power.Meanwhile, temperature rise also makes the mechanical specialities of rail change, and makes rail deliquescing, can reduce the life-span of rail.In addition, High-Speed Eddy Braking amplifies excitation source outside needing, and needs to consume electric energy during braking, there is the danger of braking failure when power-off and electric energy deficiency, and during low speed, braking force is little, is suitable for train speed narrow range.
Summary of the invention
The present invention be in order to solve current DC excitation High-Speed Eddy Braking technology there is train braking time, eddy current on rail produces a large amount of heat, and make the temperature of rail increase, therefore its parameter such as conductivity and permeability all will change, reduce the life-span of rail simultaneously, in addition, High-Speed Eddy Braking amplifies excitation source outside needing, and needs to consume electric energy during braking, there is the danger of braking failure when power-off and electric energy deficiency, and during low speed, braking force is little, be suitable for the problem of train speed narrow range.Alternating current-direct current mixed excitation High-Speed Eddy Braking device is now provided.
Alternating current-direct current mixed excitation High-Speed Eddy Braking device, it comprises AC excitation eddy current brake unit, DC excitation eddy current brake unit, excitation con-trol inverter, polyphase rectifier and excitation capacitor group,
AC excitation eddy current brake unit comprises elementary iron core, primary control winding and prime power winding,
Slotting perpendicular to sense of motion towards air gap side at elementary iron core, embeds the heterogeneous symmetric winding of two covers in groove, the heterogeneous symmetric winding of two covers is respectively primary control winding and prime power winding,
DC excitation eddy current brake unit comprises elementary iron core and excitation winding,
The ac output end of excitation con-trol inverter is connected with the controlled winding input end of AC excitation eddy current brake unit, excitation capacitor group is connected in parallel on the power winding mouth of AC excitation eddy current brake unit, the mouth of power winding is connected with the ac input end of polyphase rectifier, and two ends of DC excitation eddy current brake unit excitation winding are connected on the DC output end of polyphase rectifier.
Alternating current-direct current mixed excitation High-Speed Eddy Braking device, it comprises AC excitation eddy current brake unit, DC excitation eddy current brake unit, excitation con-trol inverter and excitation capacitor,
AC excitation eddy current brake unit comprises elementary iron core and armature winding, slotting perpendicular to sense of motion towards air gap side at elementary iron core, embeds the heterogeneous symmetrical primary winding of a collar-shaped in groove;
DC excitation eddy current brake unit comprises elementary iron core and excitation winding, be connected with the armature winding of AC excitation eddy current brake unit after the ac output end of excitation con-trol inverter seals in inductance, excitation capacitor group is connected in parallel on the armature winding mouth of AC excitation eddy current brake unit, and DC excitation eddy current brake unit excitation winding two ends are connected on the DC bus of excitation con-trol inverter.
Beneficial effect of the present invention is: adopt excitation capacitor group can improve inverter outgoing side power factor, reduce inverter output current and loss, reduce the volume and weight of inverter; By adopting the braking of alternating current-direct current mixed excitation, decreasing the eddy current loss produced in rail, reducing the temperature rise of rail, extending the life-span of rail; There is provided excitation electric energy by the output of AC excitation eddy current brake unit for DC excitation eddy current brake unit, both reduce the capacity of excitation source and volume, the weight of braking resistor; Again reduce brake system cost, improve the reliability of brake system.
By elementary for DC excitation eddy current brake unit and the elementary left and right sides being arranged on the bogie of car by drg supporting and adjusting device respectively of AC excitation eddy current brake unit, it is elementary that drg supporting and adjusting device can also be elevated the elementary and AC excitation eddy current brake unit of DC excitation eddy current brake unit, with the gap adjusting that DC excitation eddy current brake unit is elementary and AC excitation eddy current brake unit is elementary and between rail, rail is secondary as eddy current brake unit, vehicle power (storage battery) or main electricity is utilized to provide initial magnetization energy to excitation con-trol inverter and stream excitation eddy current brake unit and AC excitation eddy current brake unit, when DC excitation eddy current brake unit elementary and AC excitation eddy current brake unit is elementary pass into exciting current after, travelling-magnetic-field can be produced in air gap between the primary and secondary, travelling-magnetic-field and rail intersecting chain, meeting inductive loop in rail, eddy current and travelling-magnetic-field interact, produce the electromagnetic system power contrary with train direct of travel, this electromagnetic braking masterpiece is used on eddy current brake unit elementary (train), make train deceleration.While train deceleration, the kinetic transformation of train is the eddy current loss in the electric energy that exports of eddy current brake unit and rail, the electric energy exported both can consume on the resistor of eddy current brake unit winding resistance and parallel connection, also can be stored in Vehicular accumulator cell or feed back on the DC bus of main traction motor inverter.Like this, both can reduce the temperature rise of rail, not need again the energy consuming vehicle power, meanwhile, can also by regulating the frequency of inverter output current, expansion retro-speed scope, or by adopting reversing braking to realize low speed and zero-speed braking.When needing the tractive force increasing train, can also exciter inverter be controlled, make eddy current brake cell operation at motoring condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one,
Fig. 2 is the principle schematic of the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one,
Fig. 3 is the principle schematic of the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention five,
Fig. 4 is existing DC excitation High-Speed Eddy Braking schematic diagram, and in figure, Reference numeral A represents eddy current, and Reference numeral B represents rail, and reference number C represents armature coil, and Reference numeral D represents brake plate, and Reference numeral E represents magnetic pole.
Detailed description of the invention
Detailed description of the invention one: see figures.1.and.2 and illustrate present embodiment, alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment, it comprises AC excitation eddy current brake unit, DC excitation eddy current brake unit, excitation con-trol inverter 1, polyphase rectifier 5 and excitation capacitor group 4
AC excitation eddy current brake unit comprises elementary iron core, primary control winding 2-2 and prime power winding 2-3,
Slotting perpendicular to sense of motion towards air gap side at elementary iron core, embeds the heterogeneous symmetric winding of two covers in groove, the heterogeneous symmetric winding of two covers is respectively primary control winding 2-2 and prime power winding 2-3,
DC excitation eddy current brake unit comprises elementary iron core and excitation winding 3-2,
The ac output end of excitation con-trol inverter 1 is connected with the controlled winding 2-2 input end of AC excitation eddy current brake unit, excitation capacitor group 4 is connected in parallel on the power winding 2-3 mouth of AC excitation eddy current brake unit, the mouth of power winding 2-3 is connected with the ac input end of polyphase rectifier 5, and two ends of DC excitation eddy current brake unit excitation winding 3-2 are connected on the DC output end of polyphase rectifier 5.
Alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment is when practical application, be fixed on the bogie of car bottom railway car, and make AC excitation eddy current brake unit and DC excitation eddy current brake unit lay respectively at directly over two one steel rails, in principle of work, AC excitation eddy current brake unit in alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment and DC excitation eddy current brake unit are all equivalent to elementary, two railway track 2-1 and 3-1 are equivalent to elementary with two corresponding secondary respectively, the distance of AC excitation eddy current brake unit and railway track 2-1 forms air gap, distance between DC excitation eddy current brake unit and railway track 3-1 forms air gap, this alternating current-direct current mixed excitation High-Speed Eddy Braking device and railway track have interacted braking function.
According to actual needs, in order to accurately control the distance between alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment and railway track 2-1 and 3-1, the adjustment of corresponding drg supporting and adjusting device can be adopted to realize, that is: the distance between accurate adjustment AC excitation eddy current brake unit and railway track 2-1 or DC excitation eddy current brake unit and railway track 3-1.
In present embodiment, the left and right sides of each bogie of car is corresponding with railway track, the bogie of car of the elementary installation of AC excitation eddy current brake unit installs an AC excitation eddy current brake unit, the bogie of car of DC excitation eddy current brake cellular installation installs a DC excitation eddy current brake unit.
Detailed description of the invention two: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one, and in present embodiment, polyphase rectifier 5 is uncontrollable rectifier or controlled rectifier.
Detailed description of the invention three: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one, in present embodiment, the mouth of power winding 2-3 also connects energy absorption resistor group.
Detailed description of the invention four: illustrate present embodiment with reference to Fig. 3 and Fig. 4, alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment, it comprises AC excitation eddy current brake unit, DC excitation eddy current brake unit, excitation con-trol inverter 1 and excitation capacitor 4
AC excitation eddy current brake unit 2 comprises elementary iron core and armature winding 2-4, slotting perpendicular to sense of motion towards air gap side at elementary iron core, embeds the heterogeneous symmetrical primary winding of a collar-shaped in groove;
DC excitation eddy current brake unit comprises elementary iron core and excitation winding 3-2, be connected with the armature winding 2-4 of AC excitation eddy current brake unit after the ac output end of excitation con-trol inverter 1 seals in inductance 6, excitation capacitor group 4 is connected in parallel on the armature winding 2-4 mouth of AC excitation eddy current brake unit, and DC excitation eddy current brake unit excitation winding 3-2 two ends are connected on the DC bus of excitation con-trol inverter 1.
In present embodiment, the bogie of car of the elementary installation of AC excitation eddy current brake unit installs an AC excitation eddy current brake unit, the bogie of car of DC excitation eddy current brake cellular installation installs a DC excitation eddy current brake unit.
Alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment is when practical application, be fixed on the bogie of car bottom railway car, and make AC excitation eddy current brake unit and DC excitation eddy current brake unit lay respectively at directly over two one steel rails, in principle of work, AC excitation eddy current brake unit in alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment and DC excitation eddy current brake unit are all equivalent to elementary, two railway track 2-1 and 3-1 are equivalent to elementary with two corresponding secondary respectively, the distance of AC excitation eddy current brake unit and railway track 2-1 forms air gap, distance between DC excitation eddy current brake unit and railway track 3-1 forms air gap, this alternating current-direct current mixed excitation High-Speed Eddy Braking device and railway track have interacted braking function.
According to actual needs, in order to accurately control the distance between alternating current-direct current mixed excitation High-Speed Eddy Braking device described in present embodiment and railway track 2-1 and 3-1, the adjustment of corresponding drg supporting and adjusting device can be adopted to realize, that is: the distance between accurate adjustment AC excitation eddy current brake unit and railway track 2-1 or DC excitation eddy current brake unit and railway track 3-1.
Detailed description of the invention five: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one, and in present embodiment, the power winding of AC excitation eddy current brake unit 2 is three-phase windings or six phase windings.
Detailed description of the invention six: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one or detailed description of the invention four, in present embodiment, regulate frequency and the phase place of excitation con-trol inverter output current, make AC excitation eddy current brake cell operation in dynamic brake pattern.
Detailed description of the invention seven: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one or detailed description of the invention four, in present embodiment, the winding of AC excitation eddy current brake unit 1 and the winding of DC excitation eddy current brake unit 2 are aluminum steel winding or copper cash winding.
Detailed description of the invention eight: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one or detailed description of the invention four, in present embodiment, DC excitation eddy current brake unit is electric excitation structure or the mixed excitation structure for electric excitation and permanent magnet excitation.
Detailed description of the invention nine: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one or detailed description of the invention four, in present embodiment, the electric power that AC excitation eddy current brake unit 2 exports is more than or equal to the electric power that DC excitation eddy current brake unit 3 absorbs.
Detailed description of the invention ten: present embodiment is described further the alternating current-direct current mixed excitation High-Speed Eddy Braking device described in detailed description of the invention one or detailed description of the invention four, in present embodiment, the two ends parallel energy absorbing resistor device of DC excitation eddy current brake unit 3 excitation winding.
Claims (10)
1. alternating current-direct current mixed excitation High-Speed Eddy Braking device, it is characterized in that, it comprises AC excitation eddy current brake unit, DC excitation eddy current brake unit, excitation con-trol inverter (1), polyphase rectifier (5) and excitation capacitor group (4)
AC excitation eddy current brake unit comprises elementary iron core, primary control winding (2-2) and prime power winding (2-3),
Slotting perpendicular to sense of motion towards air gap side at elementary iron core, embeds the heterogeneous symmetric winding of two covers in groove, the heterogeneous symmetric winding of two covers is respectively primary control winding (2-2) and prime power winding (2-3),
DC excitation eddy current brake unit comprises elementary iron core and excitation winding (3-2),
The ac output end of excitation con-trol inverter (1) is connected with controlled winding (2-2) input end of AC excitation eddy current brake unit, excitation capacitor group (4) is connected in parallel on power winding (2-3) mouth of AC excitation eddy current brake unit, the mouth of power winding (2-3) is connected with the ac input end of polyphase rectifier (5), and two ends of DC excitation eddy current brake unit excitation winding (3-2) are connected on the DC output end of polyphase rectifier (5).
2. alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1, is characterized in that, polyphase rectifier (5) is uncontrollable rectifier or controlled rectifier.
3. alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1, is characterized in that, the mouth of prime power winding (2-3) also connects energy absorption resistor group.
4. alternating current-direct current mixed excitation High-Speed Eddy Braking device, is characterized in that, it comprises AC excitation eddy current brake unit, DC excitation eddy current brake unit, excitation con-trol inverter (1) and excitation capacitor (4),
AC excitation eddy current brake unit comprises elementary iron core and armature winding (2-4), slotting perpendicular to sense of motion towards air gap side at elementary iron core, embeds the heterogeneous symmetrical primary winding of a collar-shaped in groove;
DC excitation eddy current brake unit comprises elementary iron core and excitation winding (3-2), the ac output end of excitation con-trol inverter (1) seals in inductance (6) and is connected with the armature winding (2-4) of AC excitation eddy current brake unit afterwards, excitation capacitor group (4) is connected in parallel on armature winding (2-4) mouth of AC excitation eddy current brake unit, and DC excitation eddy current brake unit excitation winding (3-2) two ends are connected on the DC bus of excitation con-trol inverter (1).
5. the alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1 or 4, is characterized in that, the power winding of AC excitation eddy current brake unit is three-phase windings or six phase windings.
6. the alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1 or 4, is characterized in that, regulates frequency and the phase place of excitation con-trol inverter (1) outgoing current, makes AC excitation eddy current brake cell operation in dynamic brake pattern.
7. the alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1 or 4, is characterized in that, the winding of AC excitation eddy current brake unit and the winding of DC excitation eddy current brake unit are aluminum steel winding or copper cash winding.
8. the alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1 or 4, is characterized in that, DC excitation eddy current brake unit is electric excitation structure or the mixed excitation structure for electric excitation and permanent magnet excitation.
9. the alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1 or 4, is characterized in that, the electric power that AC excitation eddy current brake unit exports is more than or equal to the electric power that DC excitation eddy current brake unit absorbs.
10. the alternating current-direct current mixed excitation High-Speed Eddy Braking device according to claim 1 or 4, is characterized in that, the two ends parallel energy absorbing resistor device of DC excitation eddy current brake unit excitation winding (3-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510560712.3A CN105196880B (en) | 2015-09-06 | 2015-09-06 | Alternating current-direct current composite excitation High-Speed Eddy Braking device |
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| CN201510560712.3A CN105196880B (en) | 2015-09-06 | 2015-09-06 | Alternating current-direct current composite excitation High-Speed Eddy Braking device |
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| CN105196880A true CN105196880A (en) | 2015-12-30 |
| CN105196880B CN105196880B (en) | 2018-01-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111225752A (en) * | 2017-08-18 | 2020-06-02 | Sms集团有限公司 | Method and device for electric braking with mechanical stop device of direct drive mechanism in metal working |
| CN113489419A (en) * | 2021-06-30 | 2021-10-08 | 南京航空航天大学 | Electro-magnetic doubly salient motor driving and charging integrated system and multi-mode energy feedback control method thereof |
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| CN102355117A (en) * | 2011-09-22 | 2012-02-15 | 哈尔滨工业大学 | Longitudinal magnetic flux structure rectilinear eddy current brake |
| JP5242604B2 (en) * | 2010-01-15 | 2013-07-24 | 公益財団法人鉄道総合技術研究所 | Eddy current brake device for railway vehicles |
| CN103762821A (en) * | 2014-02-13 | 2014-04-30 | 哈尔滨工业大学 | Electromagnetic brake linear motor system and control method thereof |
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2015
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| US20080257662A1 (en) * | 2004-03-19 | 2008-10-23 | Siegbert Kunz | Magnetic Levitation Train Provided with an Eddy-Current Brake |
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| CN111225752A (en) * | 2017-08-18 | 2020-06-02 | Sms集团有限公司 | Method and device for electric braking with mechanical stop device of direct drive mechanism in metal working |
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| CN113489419A (en) * | 2021-06-30 | 2021-10-08 | 南京航空航天大学 | Electro-magnetic doubly salient motor driving and charging integrated system and multi-mode energy feedback control method thereof |
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| CN105196880B (en) | 2018-01-30 |
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