CN207338256U - A kind of high-voltage DC contactor - Google Patents
A kind of high-voltage DC contactor Download PDFInfo
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- CN207338256U CN207338256U CN201721055761.2U CN201721055761U CN207338256U CN 207338256 U CN207338256 U CN 207338256U CN 201721055761 U CN201721055761 U CN 201721055761U CN 207338256 U CN207338256 U CN 207338256U
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Abstract
It the utility model is related to contactor field, provide a kind of high-voltage DC contactor, including pony sill, two side cover plates, electromagnetic drive module and transmission module, electromagnetic drive module includes dynamic iron core, the electromagnetic coil being sheathed in dynamic iron core and the cylindrical shape yoke being sheathed on electromagnetic coil, cylindrical shape yoke is installed on pony sill, transmission module includes auxiliary pushing block, auxiliary pushing block is directly connected to dynamic iron core, the auxiliary pushing block connects a roller bearing by bearing, the pony sill fixes a pivoted frame by reaction spring installation, the roller bearing is arranged in a pivoted frame, pivoted frame is provided with moving contact, static contact is installed on one side cover plate, static contact is opposite with moving contact and sets.High-voltage DC contactor provided by the utility model has the advantages that strong fast long lifespan, connection and breaking speed, strong breaking capacity, shock resistance, compact-sized, good airproof performance and convenient for installation and maintenance.
Description
Technical field
It the utility model is related to contactor field, more particularly to a kind of high-voltage DC contactor.
Background technology
At present, the D.C. contactor used on China's locomotive mainly has two kinds of electric-controlled type and electromagnetic type, electromagnetic treadle
By electromagnetic force as power source.Electromagnetic treadle mainly includes body part, running part, electromagnetic drive part and arc extinguishing
Room.Electromagnetic system produces electromagnetic force when being powered, and makes armature motion and contact is connected or disjunction, so as to connect or disjunction direct current
Arc；Electromagnet dead electricity, contact reset.
It is the shortcomings that existing D.C. contactor both at home and abroad：1st, actuation, rate of release are slow, contact melted easily occur；2nd, close,
Moving contact does not produce relative friction, no self-cleaning function with static contact during separating brake；3rd, arc-control device is installed on switch using screw
On, install and dismantle and is cumbersome；4th, magnetic blow-out part uses permanent-magnet steel, and the use to major loop has point of positive electrode and negative electrode；5th, arc extinguishing
Room causes breaking arc spread of voltage using metal gate slice structure more；6th, capacity is low, can not the load of disjunction high voltage direct current.
It is therefore desirable to design a kind of high-voltage DC contactor, to overcome the above problem.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art, there is provided a kind of high-voltage DC contactor, has
Service life is long, connect and breaking speed is fast, strong breaking capacity, shock resistance are strong, compact-sized, good airproof performance and installation are safeguarded
The advantages of facilitating.
The utility model is realized in this way：
The utility model provides a kind of high-voltage DC contactor, including pony sill and two side cover plates, the pony sill
Chamber is enclosed with two side cover plates, electromagnetic drive module and transmission module, the electromagnetic drive are equipped with the chamber
Module includes dynamic iron core, the electromagnetic coil being sheathed in dynamic iron core and the cylindrical shape yoke being sheathed on electromagnetic coil, described
Cylindrical shape yoke is installed on pony sill, and the transmission module includes auxiliary pushing block, and the auxiliary pushing block directly connects with dynamic iron core
Connect, the auxiliary pushing block connects a roller bearing by bearing, and the pony sill fixes a pivoted frame, the rolling by reaction spring installation
Axis is arranged in a pivoted frame, and moving contact is provided with the pivoted frame, wherein static contact is installed on a side cover plate, it is described quiet
Contact is opposite with moving contact and sets.
Further, be equipped with copper-base graphite bushing between the electromagnetic coil and cylindrical shape yoke, the auxiliary pushing block with
Buffering spacer is equipped between dynamic iron core.
Further, moving contact plate is further included, the moving contact is fixed on moving contact plate, one end of the moving contact plate
It is connected by compressing spring with pivoted frame, the other end of the moving contact plate is connected by elastic plate with movable contact bus bar, described dynamic
Contact busbar is fixed on side cover plate and stretches out outside the chamber, and the static contact is fixed in stationary contact head plate, the static contact
Plate is connected with static contact busbar, and the static contact busbar is fixed on side cover plate and stretches out outside the chamber.
Further, control loop is further included, the control loop includes solid-state relay, keeps resistance and pressure-sensitive electricity
Resistance, the holding resistance are connected with electromagnetic coil, and the holding resistance and electromagnetic coil after series connection are in parallel with the varistor, institute
State that the relay coil of solid-state relay is in parallel with varistor, the both ends for keeping resistance connect the two of solid-state relay respectively
A output terminal.
Further, magnetic blow-out module is further included, the magnetic blow-out module includes magnetic blow-out iron core and is sheathed on outside magnetic blow-out iron core
Blowout coil, the both ends of the blowout coil are electrically connected with static contact and moving contact respectively, and the static contact is equipped with stationary contact
Head arc leading angle, the moving contact are equipped with moving contact arc leading angle, and moving contact arc electrode is fixed with the side cover plate, described dynamic
Contact arc electrode is located at the surface of moving contact arc leading angle.
Further, arc-chutes are provided with above the magnetic blow-out module, the arc-chutes are connected in two side cover plates
Upper end, the arc-chutes are interior to be equipped with multiple staggered ceramic grid, and the both sides of the arc-chutes are magnetic conductive board.
Further, the electric interface of the moving contact and the electric interface of static contact are arc surface.
Further, the pony sill is installed on base, and grounding nut is fixed with the base.
Further, securing plate is mounted on the outside of two side cover plates, the securing plate is fixed on base, institute
The outer wall for stating cylindrical shape yoke is contacted with securing plate.
The utility model has the advantages that：
1st, using cylindrical shape yoke, make magnetic circuit sealing more preferable, avoid magnetic force from being lost in, larger electromagnetism can be provided for dynamic iron core
Power, makes the actuation of contactor, rate of release faster；
2nd, side cover plate both sides installation securing plate, can improve shock resistance, and securing plate is in contact with cylinder type yoke outer wall,
And on base, base is grounded by grounding nut so that cylinder type yoke is grounded, more compact structure while safe；
3rd, the contact surface of moving contact and static contact is arc surface, and moving contact is mutually squeezed with static contact during being attracted and discharging
Press, rub it is self-cleaning；
4th, arc-chutes are directly clamped among on side cover plate, quick and easy for installation, and use top inside arc-chutes as inclined plane
Ceramic grid, arc quenching effect are good；
5th, electromagnet dynamic iron core is directly connected fixation with auxiliary pushing block, and auxiliary pushing block directly touches auxiliary switch, improves
Export the accuracy and reliability of signal.
6th, control loop provides sufficiently large combined floodgate electromagnetic force for contactor so that moving contact being capable of quick-make；Closure
Resistance string entry loop is kept afterwards, ensure that electromagnetic coil can be electrified for a long time.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of profile for high-voltage DC contactor that the utility model embodiment provides；
Fig. 2 is a kind of dimensional structure diagram for high-voltage DC contactor that Fig. 1 is provided；
Fig. 3 is a kind of profile of the electromagnetic drive module for high-voltage DC contactor that Fig. 1 is provided；
Fig. 4 is a kind of structure diagram of the magnetic blow-out module for high-voltage DC contactor that Fig. 1 is provided；
Fig. 5 is a kind of structure diagram of the arc-chutes for high-voltage DC contactor that Fig. 1 is provided.
In figure：11- pony sills, 12- side cover plates, 13- bases, 14- securing plates, 131- grounding nuts, 2- electromagnetic drive moulds
Block, 21- dynamic iron cores, 22- electromagnetic coils, 23- cylindrical shape yokes, 24- copper-base graphite bushings, 25- buffering spacers, 3- transmission moulds
Block, 31- auxiliary pushing blocks, 32- bearing blocks, 33- bearings, 34- roller bearings, 35- pivoted frames, 351- pre-compressed springs, 36- counter-force tension springs, 41-
Moving contact, 42- static contacts, 43- moving contact plates, 44- elastic plates, 45- movable contact bus bars, 46- stationary contact head plates, 47- static contacts are female
Row, 51- solid-state relays, 52- holding resistance, 53- varistors, 61- magnetic blow-out iron cores, 62- blowout coils, 63- static contacts draw
Arc angle, 64- moving contact arc leading angles, 65- moving contact arc electrodes, 71- ceramics grid, 72- magnetic conductive boards, 73- snap-gauges, 74- tower springs,
8- auxiliary switches.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
The all other embodiment obtained, shall fall within the protection scope of the present invention.
Such as Fig. 1-Fig. 3, the utility model embodiment provides a kind of high-voltage DC contactor (hereinafter referred to as contactor), including
Pony sill 11 and two side cover plates 12, the pony sill 11 and two side cover plates 12 are enclosed chamber.Set in the chamber
There are electromagnetic drive module 2 and transmission module 3.The electromagnetic drive module 2 includes dynamic iron core 21, is sheathed in dynamic iron core 21
Electromagnetic coil 22 and the cylindrical shape yoke 23 being sheathed on electromagnetic coil 22, the cylindrical shape yoke 23 are installed on pony sill 11
On.Using cylinder type electromagnet, make magnetic circuit sealing more preferable, avoid magnetic force from being lost in, can be that dynamic iron core 21 provides larger electromagnetic force, make
The performance of contactor is more preferable, be especially attracted, rate of release faster so that contactor is connected, breaking capacity carries significantly
It is high.The transmission module includes auxiliary pushing block 31, and the auxiliary pushing block 31 is directly connected to dynamic iron core 21, the auxiliary pushing block 31
On a bearing block 32 is installed, bearing 33 is installed on the bearing block 32, roller bearing 34, the rolling are equipped with the bearing 33
Axis 34 is arranged in pivoted frame 35, and the pivoted frame 35 is fixed on pony sill 11 by a counter-force tension spring 36, and the pivoted frame 35 is installed
There is moving contact 41, static contact 42 is installed on a side cover plate 12, the static contact 42 is opposite with moving contact 41 and sets.Contact
Device is in normal off-state, and due to the effect of counter-force tension spring 36 and gravity, pivoted frame 35 is turned off position, and contactor is in separating brake
State, 21 air gap of dynamic iron core is larger at this time.When contactor is started to work, electromagnetic coil 22 obtains electrical excitation, and dynamic iron core 21 is subject to
Electromagnetic force band dynamic auxiliary pushing block 31 moves up, at the same aid in pushing block by roller bearing 34 and needle bearing 33 drive pivoted frame 35 and
Moving contact 41 rotates, and moving contact 41 is contacted with static contact 42, major loop closure.In major loop closing course, pivoted frame 35 drives
Counter-force tension spring 36 is stretched while moving contact 41 rotates, when 22 dead electricity of electromagnetic coil, the electromagnetic force in electromagnetic coil 22 disappears
Lose,；Pivoted frame 35 is quickly returning to the disconnection position started under the counter-force effect of counter-force tension spring 36, and moving contact 41 divides with static contact 42
From major loop disconnects.The high-voltage DC contactor electromagnetic drive module that the utility model embodiment provides uses cylindrical shape yoke,
Make magnetic circuit sealing more preferable, avoid magnetic force from being lost in, larger electromagnetic force can be provided for electromagnet dynamic iron core, make the action of contactor
Energy, especially actuation, rate of release are faster；Running part is compact-sized, transmission is rapid so that between static contact and moving contact
Contact with separating rapidly, allow pivoted frame to rapidly return back to disconnect position using counter-force tension spring, contactor release is fast.
Preferably, such as Fig. 3, copper-base graphite bushing 24 is equipped between the electromagnetic coil 22 and cylindrical shape yoke 23, it is copper-based
24 hardness of graphite bushing is relatively low, wearability is preferable, it is possible to reduce the abrasion between dynamic iron core 21 and cylindrical shape yoke 23, extends dynamic
The service life of iron core 21 and cylindrical shape yoke 23.Buffered between the auxiliary pushing block 31 and dynamic iron core 21 equipped with buffering spacer 25
Gasket 25 alleviates the thrust between auxiliary pushing block 31 and dynamic iron core, extends dynamic iron core 21 and aids in the service life of pushing block 31.
Preferably, such as Fig. 1-Fig. 2, moving contact plate 43 is further included, the moving contact 41 is fixed on moving contact plate 43, described
One end of moving contact plate 43 is connected by compressing spring 351 with pivoted frame 35, and the other end of the moving contact plate 43 passes through elastic plate
44 are connected with movable contact bus bar 45, and the movable contact bus bar 45 is fixed on side cover plate 12 and stretches out outside the chamber, described quiet
Contact 42 is fixed in stationary contact head plate 46, and the stationary contact head plate 46 is connected with static contact busbar 47, and the static contact busbar 47 is solid
Due on side cover plate 12 and outside the stretching chamber.Major loop is connected on movable contact bus bar 45 and static contact busbar 47, electromagnetism
Coil 22 electrical excitation, dynamic iron core 21 receives electromagnetic force band dynamic auxiliary pushing block 31 and moving contact plate 43 rotates, moving contact 41 with
Rotated with moving contact plate 42 so that moving contact is contacted with static contact, major loop closure.After major loop closure, dynamic iron core 21
May proceed to away the excess of stroke drives pivoted frame 35 to rotate, and is connected between moving contact plate 43 and movable contact bus bar 45 by elastic plate 44 so that
Moving contact plate 43 can rotate on pivoted frame 35 in certain angle, pre-compressed spring 351 is compressed while rotation provide moving contact 41 and press
Power.
Preferably, such as Fig. 1-Fig. 2, control loop 5 is further included, the control loop 5 includes solid-state relay 51, keeps electricity
Resistance 52 and varistor 53, the holding resistance 52 are connected with electromagnetic coil 22, holding resistance 52 and electromagnetic wire after series connection
Circle 22 is connected in parallel with varistor 53, and the relay coil of the solid-state relay 51 is in parallel with varistor 53, the holding
The both ends of resistance 52 connect two output terminals of solid-state relay 51 respectively.Contactor closes a floodgate moment, and control voltage is applied directly to
22 both ends of electromagnetic coil, there is provided sufficiently large combined floodgate electromagnetic force, moving contact 41 being capable of quick-makes with static contact 42；After closure,
Solid-state relay output terminal by one section delay after by it is normally closed be converted to it is normally opened, keep resistance 52 seal in circuit, ensure that electromagnetism
Coil 22 can be electrified for a long time, and contactor can be chronically at closure state.
Preferably, such as Fig. 4, magnetic blow-out module is further included, the magnetic blow-out module includes magnetic blow-out iron core 61 and is sheathed on magnetic blow-out
Blowout coil 62 outside iron core 61, the both ends of the blowout coil 62 are electrically connected with static contact 42 and moving contact 41 respectively, described
Static contact 42 is equipped with static contact arc leading angle 63, and the moving contact 41 is equipped with moving contact arc leading angle 64, on the side cover plate 12
Moving contact arc electrode 65 is fixed with, the moving contact arc electrode 65 is located at the surface of moving contact arc leading angle 64.Work as electromagnetism
During 22 dead electricity of coil, major loop disconnects, and blowout coil is connected in series in major loop and produces magnetic field, contactor is disconnected caused by
Electric arc is blown away.Moving contact arc leading angle 64 and static contact arc leading angle 63 form an arc transfer path, moving contact arc electrode 65
Secondary arc transfer path is formed with static contact arc leading angle 63, two arc transfer Route guiding electric arcs are produced by blowout coil 62
Magnetic field be blown to relevant position.
Preferably, such as Fig. 1,2,5, arc-chutes are provided with above the magnetic blow-out module, the arc-chutes are connected in two
Electric arc is blown to arc-chutes by the upper end of side cover plate 12, magnetic blow-out module.The installation of the arc-chutes of existing contactor generally uses screw,
Arc-chutes in contactor provided in this embodiment are directly clamped among the side cover plate 12 of both sides by snap-gauge 73, tower spring 74 and fixing axle
On, it is quick and easy for installation.Multiple ceramic grid 71 are equipped with arc-chutes, the top of each ceramic grid 71 is inclined plane,
The top height of i.e. ceramic grid 71 differs.The both sides of arc-chutes are magnetic conductive board 72, and 72 pilot arc of magnetic conductive board enters arc-chutes.
Multiple ceramics grid 71 are fixed on the magnetic conductive board 72 of both sides.Ceramic grid 71 and opposite side magnetic conductive board on side magnetic conductive board 72
Ceramic grid 71 on 72 is staggered.Multiple ceramic grid 71 that height differs and staggered can effective subdividing the arc,
Electric arc is set quickly to extinguish.
Preferably, such as Fig. 1-Fig. 2, auxiliary switch 8 is provided with the pushing direction of the auxiliary pushing block 31.Dynamic iron core 21 is straight
Connect and aid in pushing block 31 be connected fixations, auxiliary pushing block 31 directly touches auxiliary switch 8, improve export the accuracy of signal with can
By property.
Preferably, such as Fig. 1, the electric interface of the moving contact 41 and the electric interface of static contact 42 are arc surface.It is dynamic
Mutually extruding, the phase mutual friction in connection and breaking course with static contact 42 of contact 41, can remove surface dirt and surface automatically
Oxide, increases contact fusion welding resisting ability, effectively extends the electric life of contactor；
Preferably, as Fig. 1-Fig. 2, the pony sill 11 are installed on base 13, ground connection spiral shell is fixed with the base 13
Mother 131.Grounding nut 131 ensures the electrical safety of contactor.
Preferably, as Fig. 1-Fig. 2, the outside of two side cover plates 12 are mounted on securing plate 14, securing plate 14 can be steel
Plate, securing plate can improve the shock resistance of contactor.The securing plate 14 is fixed on base 13, outside cylindrical shape yoke 23
Wall is contacted with securing plate 14, the outer wall of cylindrical shape yoke 23 contacted with securing plate 14 so that cylindrical shape yoke 23 be grounded while,
Contactor overall structure is compacter.
Contactor provided by the utility model, is primarily adapted for use in high-speed EMU high-voltaghe compartment short circuit contactor；It is same suitable
For railway traction locomotive, industrial and mineral electric locomotive, subway and light rail vehicle with passenger carrying vehicle as short circuit, charging contact
Device.
Compared with existing contactor, contactor load capacity provided by the utility model is big, and combined floodgate, opening velocity are fast；
It is contactor dependable performance provided by the utility model, compact-sized, small compared with the contactor with even load, and pacify
Dress and convenient disassembly, reliable.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of high-voltage DC contactor, including pony sill and two side cover plates, the pony sill and two side cover plates enclose
Form chamber, it is characterised in that be equipped with electromagnetic drive module and transmission module, the electromagnetic drive module bag in the chamber
Include dynamic iron core, the electromagnetic coil being sheathed in dynamic iron core and the cylindrical shape yoke being sheathed on electromagnetic coil, the cylindrical shape
Yoke is installed on pony sill, and the transmission module includes auxiliary pushing block, and the auxiliary pushing block is directly connected to dynamic iron core, described
Pushing block is aided in connect a roller bearing by bearing, the pony sill fixes a pivoted frame by reaction spring installation, and the roller bearing is worn
In in a pivoted frame, moving contact is installed on the pivoted frame, wherein be provided with static contact on a side cover plate, the static contact with
Moving contact is opposite and sets.
2. high-voltage DC contactor as claimed in claim 1, it is characterised in that：Between the electromagnetic coil and cylindrical shape yoke
Equipped with copper-base graphite bushing, buffering spacer is equipped between the auxiliary pushing block and dynamic iron core.
3. high-voltage DC contactor as claimed in claim 1, it is characterised in that：Moving contact plate is further included, the moving contact is consolidated
Due on moving contact plate, one end of the moving contact plate is connected by compressing spring with pivoted frame, the other end of the moving contact plate
It is connected by elastic plate with movable contact bus bar, the movable contact bus bar is fixed on side cover plate and stretches out outside the chamber, described
Static contact is fixed in stationary contact head plate, and the stationary contact head plate is connected with static contact busbar, and the static contact busbar is fixed on side cover
On plate and stretch out outside the chamber.
4. high-voltage DC contactor as claimed in claim 1, it is characterised in that：Further include control loop, the control loop
Including solid-state relay, resistance and varistor are kept, the holding resistance is connected with electromagnetic coil, the holding electricity after series connection
Resistance and electromagnetic coil are in parallel with the varistor, and the relay coil of the solid-state relay is in parallel with varistor, the guarantor
The both ends for holding resistance connect two output terminals of solid-state relay respectively.
5. high-voltage DC contactor as claimed in claim 1, it is characterised in that：Further include magnetic blow-out module, the magnetic blow-out module
Including magnetic blow-out iron core and the blowout coil being sheathed on outside magnetic blow-out iron core, the both ends of the blowout coil respectively with static contact and dynamic
Contact is electrically connected, and the static contact is equipped with static contact arc leading angle, and the moving contact is equipped with moving contact arc leading angle, the side cover
Moving contact arc electrode is fixed with plate, the moving contact arc electrode is located at the surface of moving contact arc leading angle.
6. high-voltage DC contactor as claimed in claim 5, it is characterised in that：Arc extinguishing is provided with above the magnetic blow-out module
Room, the arc-chutes are connected in the upper end of two side cover plates, and multiple staggered ceramic grid, institute are equipped with the arc-chutes
The both sides for stating arc-chutes are magnetic conductive board.
7. high-voltage DC contactor as claimed in claim 1, it is characterised in that：The electric interface and static contact of the moving contact
Electric interface be arc surface.
8. high-voltage DC contactor as claimed in claim 1, it is characterised in that：The pony sill is installed on base, described
Grounding nut is fixed with base.
9. high-voltage DC contactor as claimed in claim 8, it is characterised in that：It is mounted on the outside of two side cover plates
Securing plate, the securing plate are fixed on base, and the outer wall of the cylindrical shape yoke is contacted with securing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721055761.2U CN207338256U (en) | 2017-08-23 | 2017-08-23 | A kind of high-voltage DC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721055761.2U CN207338256U (en) | 2017-08-23 | 2017-08-23 | A kind of high-voltage DC contactor |
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| Publication Number | Publication Date |
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| CN207338256U true CN207338256U (en) | 2018-05-08 |
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ID=62373435
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721055761.2U Active CN207338256U (en) | 2017-08-23 | 2017-08-23 | A kind of high-voltage DC contactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831802A (en) * | 2018-06-27 | 2018-11-16 | 深圳巴斯巴汽车电子有限公司 | high voltage direct current relay with auxiliary contact |
| CN109285732A (en) * | 2018-11-30 | 2019-01-29 | 武汉长海电气科技开发有限公司 | D.C. contactor and its structure of contact terminal |
| CN110504117A (en) * | 2019-08-27 | 2019-11-26 | 西南交通大学 | A kind of symmetrical double helix autoexcitation magnetic-quenching arc-extinguishing device of T-type |
-
2017
- 2017-08-23 CN CN201721055761.2U patent/CN207338256U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831802A (en) * | 2018-06-27 | 2018-11-16 | 深圳巴斯巴汽车电子有限公司 | high voltage direct current relay with auxiliary contact |
| CN109285732A (en) * | 2018-11-30 | 2019-01-29 | 武汉长海电气科技开发有限公司 | D.C. contactor and its structure of contact terminal |
| CN109285732B (en) * | 2018-11-30 | 2024-02-13 | 武汉长海电气科技开发有限公司 | DC contactor and contact structure thereof |
| CN110504117A (en) * | 2019-08-27 | 2019-11-26 | 西南交通大学 | A kind of symmetrical double helix autoexcitation magnetic-quenching arc-extinguishing device of T-type |
| CN110504117B (en) * | 2019-08-27 | 2021-07-06 | 杭州德睿达电气有限公司 | T-shaped symmetrical double-helix self-excitation magnetic quenching device |
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