CN204230148U - Permanent magnet mechanism - Google Patents
Permanent magnet mechanism Download PDFInfo
- Publication number
- CN204230148U CN204230148U CN201420707238.3U CN201420707238U CN204230148U CN 204230148 U CN204230148 U CN 204230148U CN 201420707238 U CN201420707238 U CN 201420707238U CN 204230148 U CN204230148 U CN 204230148U
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- Prior art keywords
- iron core
- permanent magnet
- dynamic iron
- switching winding
- closing coil
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Abstract
The utility model relates to a kind of permanent magnet mechanism, and described permanent magnet mechanism comprises: static iron core, provides magnetic circuit passage; Dynamic iron core, is located in static iron core; Closing coil, the both sides of dynamic iron core; Switching winding, the both sides of dynamic iron core; Permanent magnet, is positioned at static iron core, between closing coil and switching winding; Drive rod, is connected with dynamic iron core, when switching winding is energized, and the current induced magnetic field in switching winding, the magnetic direction that switching winding produces is contrary with the magnetic direction that permanent magnet produces, and dynamic iron core, to the motion of separating brake direction, drives drive rod; When closing coil is energized, the current induced magnetic field in closing coil, the magnetic direction that closing coil produces is identical with the magnetic direction that permanent magnet produces, and dynamic iron core, to the motion of combined floodgate direction, drives drive rod.The utility model permanent magnet mechanism has that pulse current is large, the charging interval is short, excessive danger of not charging, can in parallelly use, volume is little, the life-span is long, economical and practical.
Description
Technical field
The utility model relates to train Insulation monitoring field, particularly relates to a kind of permanent magnet mechanism.
Background technology
Along with the development in epoch, use the demand of railway transportation personnel and goods also increasing, and the main flow of train is electric locomotive now.
Because train operation scope is large, the geographical conditions difference between different geographical is large, and has plains region, region, hills and various river basins.In addition height above sea level change is also different, and climbing situation is also a lot.
After train operation, all need to carry out Insulation monitoring, and the Insulation monitoring effect that existing insulation detection device detects is all very poor.
Utility model content
The purpose of this utility model is the defect for prior art, provides a kind of permanent magnet mechanism, and pulse current is large, the charging interval is short, excessive danger of not charging.
For achieving the above object, the utility model provides a kind of permanent magnet mechanism, and described permanent magnet mechanism comprises:
Static iron core, provides magnetic circuit passage;
Dynamic iron core, is located in described static iron core;
Closing coil, is positioned at the side of described static iron core, the both sides of described dynamic iron core;
Switching winding, is positioned at the opposite side of described static iron core, the both sides of described dynamic iron core;
Permanent magnet, is positioned at described static iron core, between described closing coil and switching winding;
Drive rod, is connected with described dynamic iron core, when described switching winding energising, current induced magnetic field in described switching winding, the magnetic direction that described switching winding produces is contrary with the magnetic direction that permanent magnet produces, and described dynamic iron core, to the motion of separating brake direction, drives described drive rod; When described closing coil energising, the current induced magnetic field in described closing coil, the magnetic direction that described closing coil produces is identical with the magnetic direction that permanent magnet produces, and described dynamic iron core, to the motion of combined floodgate direction, drives described drive rod.
Further, described permanent magnet is neodymium-iron-boron permanent magnet.
Further, described static iron core is square static iron core or circular static iron core.
Further, described square static iron core is silicon steel sheet stack shape structure.
Further, described circular static iron core is electrical pure iron.
Further, described dynamic iron core is electrical pure iron.
The utility model permanent magnet mechanism has that pulse current is large, the charging interval is short, excessive danger of not charging, can in parallelly use, volume is little, the life-span is long, economical and practical.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of roof of train insulation detection device;
Fig. 2 is the schematic diagram of the utility model permanent magnet mechanism.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Fig. 1 is the schematic diagram of the utility model roof of train insulation detection device, and as shown in the figure, roof of train insulation detection device comprises: epoxy casting cylinder 21, vacuum interrupter 22, fixed contact 23, moving contact 24 and permanent magnet mechanism 25.
Epoxy casting cylinder 21 utilizes insulating material to make, such as epoxy resin.Vacuum interrupter 22 is contained in epoxy casting cylinder 21, and is that sealing is in epoxy casting cylinder 21.Fixed contact 23 is positioned at vacuum interrupter 22, and stretches out from epoxy casting cylinder 21; Moving contact 24 is positioned at epoxy casting cylinder 21, is connected with the high pressure generator 10 of outside, receives and detects high-voltage signal; Permanent magnet mechanism 25 has drive rod 250, be connected with moving contact 24 by insulated tension pole 26, when permanent magnet mechanism 25 receives connection signal rear drive drive rod 250, moving contact 24 is contacted with fixed contact 23 in vacuum interrupter 23, detects high-voltage signal and be loaded on determinand by moving contact 24 and fixed contact 23; When permanent magnet mechanism 25 receives cut-off signal rear drive drive rod 250, moving contact 24 and fixed contact 23 are disconnected in vacuum interrupter 22.
Permanent magnet mechanism 25 is by controlling energized action, on push away with drop-down: when above pushing away, in pressing switch body, insulated tension pole 26 makes the moving contact 24 in vacuum interrupter 22 close with moving contact spring and driving member, and with constant pressure compression, moving contact 24 and fixed contact 23 is compressed; Time drop-down, pulled open the moving contact 24 of arc control device equally by insulated tension pole in switch body 26, make switch opens; While switch motion, the proximity switch be arranged on permanent magnet mechanism 25 moves up and down simultaneously, opens or closes.
Self-evident as Insulation Inspection System roof device for the importance of Insulation Inspection System reliability service.For high-pressure vacuum switch (general switch is also like this), ensure that the key of its reliability design is: the application of arc control device, insulating Design, operating mechanism and transmission, controller and attachment design.
Vacuum interrupter 22 is as isolating switch, and actual drop-out current is only milliampere level, and much smaller than specified switching current (630A), therefore its life-span and fail safe will improve further.The closing force that vacuum interrupter 22 needs is 600-800N, and permanent magnet mechanism 25 closing force is designed to 2200N, even if some demagnetization occurs after using long-time and also can normally use by assurance device.Insulated tension pole 26 fully protects positive reliability and synchronism as drive disk assembly.Moving contact 24 pull bar have employed epoxy resin sealing and makes, and decreases the quality of motion parts, for divide-shut brake provides certain facility.
Epoxy insulation material is widely applied in High-Voltage Electrical Appliances field due to its excellent insulation, physicochemical property.Have employed the main insulation part that outdoor epoxy resin is switch, it has better electrically, and mechanical integrated performance, is conducive to the volume and weight alleviating top of car.It has ultra-violet resistance, hydrophobicity and self-cleaning, and the operational maintenance of device is simplified greatly.
27.5kV electric pressure, under air humidity 100% saturated conditions, safety air insulation distance >=360mm, can meet relevant requirements.
According to the pertinent regulations of 27.5kV contact line electrical equipment intensity, design that outer creep distance is 1.1m, interior creep distance is 0.6m, withstand voltage is over the ground 100kV/1 minute.
Controller adopts low-power microprocessor, exports and adopts device for high-power power electronic, and main components adopts army's grade element, and current/voltage leaves nargin, and whole control circuit strengthens electromagnetic compatibility immunity design.Power supply supply is provided by electric capacity.Proximity switch adopts the proximity switch in 1,000,000 life-spans, and reliability is high.
Vacuum interrupter 22 directly waters in epoxy insulation upper end (fixed contact) and accesses motor train unit roof bus, and lower end (moving contact) connects the output rising high pressure generator 10.Permanent magnet mechanism is installed below axis be used for disconnecting and moving contact in closed vacuum interrupter and fixed contact.Vacuum interrupter rated operational voltage 40.5kV, short duration power frequency withstand voltage reaches 100kV, rated current 630A, opens apart from 14mm, mechanical endurance 20000 times.Vacuum interrupter replaces traditional switch to not only increase fail safe, improves stability.And stopped charged point, close a floodgate time arcing, electric discharge phenomena.
Fig. 2 is the schematic diagram of the utility model permanent magnet mechanism, and as shown in the figure, the utility model permanent magnet mechanism specifically comprises: static iron core 51, dynamic iron core 52, closing coil 53, switching winding 54, permanent magnet 55 and drive rod 56.
Static iron core 51 provides magnetic circuit passage; Dynamic iron core 52 is located in static iron core 51; Closing coil 53 is positioned at the side of static iron core 51, the both sides of dynamic iron core 52; Switching winding 54 is positioned at the opposite side of static iron core 51, the both sides of dynamic iron core 52; Permanent magnet 55 is positioned at static iron core 51, between closing coil 53 and switching winding 54; Drive rod 56 is connected with dynamic iron core 52, when switching winding is energized, and the current induced magnetic field in switching winding, the magnetic direction that switching winding produces is contrary with the magnetic direction that permanent magnet produces, and dynamic iron core, to the motion of separating brake direction, drives drive rod; When closing coil is energized, the current induced magnetic field in closing coil, the magnetic direction that closing coil produces is identical with the magnetic direction that permanent magnet produces, and dynamic iron core, to the motion of combined floodgate direction, drives drive rod.
Permanent magnet mechanism 25 adopts symmetrical expression bistable structure, and no matter at closing position and open position, its confining force provides by neodymium-iron-boron permanent magnet.Permanent magnet mechanism is made up of seven major parts: be fixed core, and for mechanism provides magnetic circuit passage, generally adopt silicon steel sheet stack shape structure for square structure, circular configuration then adopts electrical pure iron; Dynamic iron core is topmost moving component in whole mechanism, general employing electrical pure iron structure; Permanent magnet is power required when mechanism provides maintenance; For switching winding and closing coil; For drive rod, it is the connection tie between operating mechanism and switch drive.For drive rod, it is the connection tie between operating mechanism and switch drive.Drive motion unshakable in one's determination to produce electromagnetic attraction, must give permanent magnet mechanism point, closing coil energising, make it reach certain exciting watts, could meet like this vacuum switch point, closing speed requirement.Adopt large value capacitor as power supply in checkout gear, have that pulse current is large, the charging interval is short, excessive danger of not charging, can in parallelly use, volume is little, the life-span is long, the advantage such as economical and practical.
When permanent magnet mechanism is in closing position, the magnetic line of force that permanent magnet produces is as in figure I.At this moment, bottom magnetic circuit reluctance is much larger than top magnetic circuit, and dynamic iron core remains on closing position.During separating brake, switching winding is energized, and the current induced magnetic field in switching winding, its magnetic force direction is as the magnetic line of force in figure II.The magnetic direction that switching winding produces at top working gas gap is contrary with the magnetic direction that permanent magnet produces.When the electric current in switching winding reaches a certain value, the magnetic line of force of mechanism upper end is cancelled totally, and dynamic iron core starts the moved downward at contact spring (or sluice separating spring) and a small amount of electromagnetic force.Along with the reduction air-gap reluctance of bottom air gap also reduces gradually, when the magnetic flux density of bottom air gap is far longer than the magnetic flux density of top air gap, dynamic iron core downwards will in accelerated motion.After dynamic iron core moves to stroke half, the direction of the resultant magnetic field that coil current and permanent magnet produce is downward, so, accelerate again the motion of dynamic iron core further, until switch separating brake puts in place.After switch separating brake puts in place, signal is returned controller by interlock, automatically cut off switching winding 5. in electric current, dynamic iron core remains on open position.
Again as shown in Figure 1, described device also comprises mechanism case 27 and cover plate 28, and permanent magnet mechanism 25 and external high pressure generator 10 are contained in mechanism case 27, and cover plate 28 covers on structure case 27.
Concrete, roof of train insulation detection device is positioned at the roof of train, vacuum interrupter 22 sealing, in epoxy casting cylinder 21, is installed a permanent magnet mechanism 25 in structure case 27, is linked the drive rod 250 of vacuum interrupter moving contact 24 and permanent magnet mechanism 25 with insulated tension pole 26 immediately below it.Vacuum interrupter moving contact 24 by being flexible coupling, external high pressure generator 10 output received by wire, high pressure generator 10 obtains the 0-190V industrial-frequency alternating current sent here of voltage regulator from aviation plug, and boosts to 0-35kV.Permanent magnet mechanism 25 is divided by aviation plug acquisition, conjunction signal drives the indoor moving contact 24 of vacuum extinction, fixed contact 23 closes or disconnection, and when closing, high pressure detection signal is carried on high voltage bus.The detection voltage sensed and Leakage Current are delivered to controller by aviation plug and are processed analysis by measuring junction.
1, top of car electric Field Calculation and analysis
In order to make roof of train insulation detection device, volume is little as far as possible, numerical analysis and optimal design have been carried out to its Electric Field Distribution, maximum field intensity under actual motion voltage is 30kV in air is less than 3kV/mm, and the maximum field strength in insulating material is much smaller than its disruptive field intensity.Therefore these device section insulation property are safe and reliable.
2, top of car aerodynamic air resistance calculates and analyzes
Insulation monitoring top of car is expert at during car runs, by a kind of opposition being subject to air and being formed it, i.e. and air drag F
w, it is expressed as:
Wherein: V is speed, unit: m/s;
According to motor-car maximum row vehicle velocity V
1=350km/h=97.2m/s, considers maximum wind velocity V
2=30m/s, 127.2=V
1+ V
2=97.2+30=127.2m/s;
A is Insulation monitoring top of car cross-sectional area, unit: m
2;
C
wfor air resistance coefficient, its dimensionless, it only depends on the shape of mobile object usually.Different according to the profile of object, C
wvalue is general between 0.3-0.6.For plane C
wvalue is 1.1, and for the C of a spheroid
wvalue is 0.45.Be the face of cylinder for its windward side of top of car, C
wget 0.45.
Roof of train insulation detection device is positioned over roof, and exposed part is top (epoxy casting cylinder) and bottom (mechanism case) these two parts.Calculate this two parts air drag below respectively.
The air drag F on roof of train insulation detection device top (epoxy casting cylinder)
wcalculate
A
max＝π·R·h＝3.14x150x346mm
2＝0.16m
2
Its maximum bending strength is:
And the bending strength of this material is 110-120N/mm
2as can be seen here, the bending strength that roof of train insulation detection device top (epoxy casting cylinder) is born in train traveling process is far smaller than the bending strength that epoxy casting cylinder can bear itself, can find out that to meet the deformation caused because of air drag in the running of top of car top very little.
The air drag F of roof of train insulation detection device bottom (mechanism case)
wcalculate.
A
max＝π·R·h＝3.14x200x350mm
2＝0.22m
2；
Its maximum bending strength is:
It is arranged on roof with 10 M10 bolts, and it meets the demands completely.
Mechanism case adopt stainless steel welded, above cover plate be epoxy material, surface lacquer process, casing integral sealing.Mechanism case casing bottom is arranged on the roof with pantograph compartment by the through hole that 10 diameters are 12mm.
During concrete process, obtain 24V DC powered processor from train storage battery and run, simultaneously as inverter input power.Direct current 24V electricity is reverse into alternating current 220V by inverter, then recalls 0V-190V alternating current through voltage regulator, gives step-up transformer by aviation plug.Use a Switching Power Supply alternating current 220V to be converted to the capacitor that 110V direct current is permanent magnet mechanism in addition and fill energy.Processor carries out make and break permanent magnet mechanism automatically according to crew's instruction, regulates stepping motor to drive rotating shaft on voltage regulator to export suitable test voltage, controls cabinet and be contained in the rack with pantograph compartment adjacent compartment.
The utility model has excellent cracking resistance ability, and machinery and dielectric property well, and have excellent thermostability, weathering performance, not free settling, ensure that Solidified enzyme homogeneity.
And the utility model cost performance is good, raw material system Hensel step outdoor resin; Good electric property, tracking index reaches Japanese relevant criterion; Flame retardant type product flame retardant grade proves V-0 level by UL.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only embodiment of the present utility model; and be not used in restriction protection range of the present utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (6)
1. a permanent magnet mechanism, is characterized in that, described permanent magnet mechanism comprises:
Static iron core, provides magnetic circuit passage;
Dynamic iron core, is located in described static iron core;
Closing coil, is positioned at the side of described static iron core, the both sides of described dynamic iron core;
Switching winding, is positioned at the opposite side of described static iron core, the both sides of described dynamic iron core;
Permanent magnet, is positioned at described static iron core, between described closing coil and switching winding;
Drive rod, is connected with described dynamic iron core, when described switching winding energising, current induced magnetic field in described switching winding, the magnetic direction that described switching winding produces is contrary with the magnetic direction that permanent magnet produces, and described dynamic iron core, to the motion of separating brake direction, drives described drive rod; When described closing coil energising, the current induced magnetic field in described closing coil, the magnetic direction that described closing coil produces is identical with the magnetic direction that permanent magnet produces, and described dynamic iron core, to the motion of combined floodgate direction, drives described drive rod.
2. permanent magnet mechanism according to claim 1, is characterized in that, described permanent magnet is neodymium-iron-boron permanent magnet.
3. permanent magnet mechanism according to claim 1, is characterized in that, described static iron core is square static iron core or circular static iron core.
4. permanent magnet mechanism according to claim 3, is characterized in that, described square static iron core is silicon steel sheet stack shape structure.
5. permanent magnet mechanism according to claim 3, is characterized in that, described circular static iron core is electrical pure iron.
6. permanent magnet mechanism according to claim 1, is characterized in that, described dynamic iron core is electrical pure iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420707238.3U CN204230148U (en) | 2014-11-21 | 2014-11-21 | Permanent magnet mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420707238.3U CN204230148U (en) | 2014-11-21 | 2014-11-21 | Permanent magnet mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204230148U true CN204230148U (en) | 2015-03-25 |
Family
ID=52928214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420707238.3U Expired - Fee Related CN204230148U (en) | 2014-11-21 | 2014-11-21 | Permanent magnet mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204230148U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715964A (en) * | 2015-03-30 | 2015-06-17 | 浙江华仪电器科技有限公司 | Monopole vacuum circuit breaker |
| CN108054065A (en) * | 2018-01-08 | 2018-05-18 | 银河电气有限公司 | A kind of self-healing fast-switching switch |
-
2014
- 2014-11-21 CN CN201420707238.3U patent/CN204230148U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715964A (en) * | 2015-03-30 | 2015-06-17 | 浙江华仪电器科技有限公司 | Monopole vacuum circuit breaker |
| CN108054065A (en) * | 2018-01-08 | 2018-05-18 | 银河电气有限公司 | A kind of self-healing fast-switching switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Bolong high-speed intelligent electric appliance Co Ltd Assignor: XI'AN BO LONG HIGH SPEED RAILWAY ELECTRIC APPLIANCE CO., LTD. Contract record no.: 2015610000082 Denomination of utility model: Excess current protection method for permanent-magnet device Granted publication date: 20150325 License type: Exclusive License Record date: 20150814 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20171121 |