CN210167287U - Bidirectional switch contact device - Google Patents
Bidirectional switch contact device Download PDFInfo
- Publication number
- CN210167287U CN210167287U CN201921169124.7U CN201921169124U CN210167287U CN 210167287 U CN210167287 U CN 210167287U CN 201921169124 U CN201921169124 U CN 201921169124U CN 210167287 U CN210167287 U CN 210167287U
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- Prior art keywords
- pair
- arc
- switch contact
- contact device
- fixed contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/346—Details concerning the arc formation chamber
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
According to the utility model discloses an embodiment provides a direct current switch contact device, relates to the switch contact device who has the arc extinguishing function, include: a pair of fixed contacts for applying a direct current power; a movable contact having both ends contactable with the pair of fixed contacts; at least one pair of permanent magnets disposed adjacent to the pair of fixed contacts for arc extinction; an arc cover forming a space for inserting the permanent magnet; and a sealing yoke having an opening at an upper portion thereof.
Description
Technical Field
The utility model relates to a switch contact device (contact) for controlling secondary battery's such as lithium cell electric power. More particularly, the present invention relates to a bidirectional switch contact device capable of cutting off and controlling both forward and reverse currents during charging and discharging.
Background
The bidirectional switch contact device can be used in a direct-current power transmission system such as a solar power generation system, an energy storage device, an electric bus quick charging device, and an Uninterruptible Power Supply (UPS).
The UPS and the energy storage device obtain current from a commercial power supply to charge a battery, and supply the charged energy to the commercial power supply through a bidirectional inverter when the battery is used, or the energy can function to supply power to a load.
The bidirectional switching device can be used between the battery and the inverter as an insulating switch or to cut off a fault current. In a circuit in which the battery is repeatedly charged and discharged, a current flows in the switching device in a forward direction or a reverse direction. Since the bidirectional switching device is used in both the charge and discharge modes, a switch is needed that can cut off the forward and reverse currents.
Prior art documents
Patent document
(patent document 1) KR 10-1649703B 1
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
An object of the utility model is to provide a two-way switch contact device can both cut off and control forward and reverse current when the charge-discharge of battery.
Furthermore, an object of the present invention is to provide a switch contact device, which ensures a distance between fixed contacts by disposing arc extinguishing permanent magnets between two fixed contacts, and prevents arc extinguishing capability from being reduced by disposing the arc extinguishing permanent magnets close to the fixed contacts.
Further, an object of the present invention is to provide a miniaturized bidirectional switch contact device which prevents a phenomenon of insulation breakdown which may occur when a bidirectional current is cut off, and which effectively utilizes a space while increasing a magnetic flux density between a movable contact and a fixed contact by providing an arc extinguishing permanent magnet between the fixed contacts.
In addition, the present invention has an object to supply power to a coil of a switching contact device to move a movable contact, thereby realizing safe energization and interruption of a load current between a power supply connected to a fixed contact and a load line.
In addition, an object of the present invention is to provide a bidirectional current interrupt device that does not cause a problem in interrupting current and controlling even if the direction of current changes in a device having both a charging state and a discharging state, such as an energy storage device of a UPS.
The technical problems to be solved by the present invention are not limited to the above-mentioned matters, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.
Technical scheme for solving problems
According to the utility model discloses an embodiment provides a switch contact device, relates to the switch contact device who has the arc extinguishing function, include: a pair of fixed contacts for applying a direct current power; a movable contact having both end portions contactable with the pair of fixed contacts; at least one pair of permanent magnets disposed proximate to the pair of fixed contacts for arc extinction; an arc cover formed with a space into which the permanent magnet is inserted; and a sealing yoke having an opening at an upper portion thereof.
The switch contact device also comprises a pair of arc extinguishing ceramic cavities positioned on the inner side of the arc cover, two separated arc extinguishing spaces are formed by the pair of arc extinguishing ceramic cavities, and the fixed contacts are respectively arranged at the centers of the arc extinguishing ceramic cavities.
The pair of permanent magnets are all disposed between the pair of fixed contacts. Each of the permanent magnets includes a pair of extension portions extending in a direction perpendicular to the longitudinal direction, and a space for moving the movable contact is formed between the pair of extension portions.
The movable contact is shaped to have a pair of extensions at both ends thereof, the extensions extending toward the fixed contact. And the pair of permanent magnets are configured such that a direction of magnetic fluxes based on the pair of permanent magnets intersects with an arc current direction at right angles when an arc is generated between the movable contact and the fixed contact.
The upper end of the switch contact device is sealed with ceramic, and a seal (sealing) is formed by welding with the sealing yoke.
Effect of the utility model
According to the present invention, a bidirectional switch contact device can be provided, in which both forward and reverse currents can be cut off and controlled during charging and discharging of a battery.
And, according to the utility model discloses, can provide a switch contact device, through setting up arc extinguishing permanent magnet between two fixed contact, ensure the distance between the fixed contact, prevent the arc extinguishing ability reduction through being close to fixed contact with arc extinguishing permanent magnet.
Further, according to the present invention, it is possible to provide a miniaturized bidirectional switch contact device in which the phenomenon of insulation breakdown that may occur when a bidirectional current is cut off is prevented, and by providing an arc extinguishing permanent magnet between fixed contacts, the space is effectively utilized while increasing the magnetic flux density between the movable contact and the fixed contacts.
Further, according to the present invention, the movable contact is moved by supplying power to the coil of the switching contact device, whereby safe energization and interruption of the load current is realized between the power supply connected to the fixed contact and the load line.
Further, according to the present invention, it is possible to provide a bidirectional current interrupt device which does not cause a problem in interrupting current and controlling even if the direction of current changes in a device having both a charging state and a discharging state, such as an energy storage device of a UPS.
The effects of the present invention are not limited to the above-mentioned descriptions, and other effects not described will be clearly understood by those skilled in the art from the following description.
Drawings
Fig. 1 is a drawing illustrating the structure of a bidirectional switch contact device according to the related art.
Fig. 2 is a sectional view illustrating the structure and operation of a bidirectional switch contact device according to an embodiment of the present invention.
Fig. 3 is a diagram illustrating a structure of a bidirectional switch contact device according to an embodiment of the present invention, in which a fixed contact, a movable contact, and an arc extinguishing permanent magnet are disposed.
Fig. 4 is a diagram illustrating the function of an arc extinguishing permanent magnet according to an embodiment of the present invention.
Fig. 5 is a drawing illustrating a shape of an arc extinguishing permanent magnet according to an embodiment of the present invention.
Fig. 6 is a drawing illustrating an arc cover and arc suppressing ceramic chamber structure according to an embodiment of the present invention.
Fig. 7 is a diagram illustrating a combination relationship of detailed components of a bidirectional switch contact device according to an embodiment of the present invention.
Description of the reference numerals
101: the magnetizing coil 102: movable iron core
103: the fixed iron core 104: yoke
105: yoke plate 106: movable shaft
107: movable contact 108: fixed contact
109: the contact pressure spring 110: arc extinguishing permanent magnet
111: arc cover 112: reset spring
113: insulating arc mount 114: ceramic plate
115: arc extinguishing ceramic cavity 116: permanent magnet cover
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings, which enable those skilled in the art to easily practice the present invention. The present invention can be embodied in a variety of different forms and is not limited to the embodiments described herein.
The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the case where no specific description is given in the specification, the singular expressions include plural meanings.
In the present specification, when the "includes," the mentioned constituent elements, steps, operations, and/or elements do not exclude or add other constituent elements, steps, operations, and/or elements.
In addition, the terms with ordinal numbers such as first or second used in the present invention can be used to describe the constituent elements, however, the constituent elements are not limited to the above terms. The above terms are used only to distinguish one constituent element from other constituent elements. In the description of the present invention, when it is determined that the specific description of the related known art unnecessarily obscures the idea of the present invention, the detailed description thereof will be omitted.
Further, although the respective configurations of the present invention are illustrated separately to show functions having different features of the respective configurations, this does not mean that the respective configurations are configured by separate hardware or one software. That is, for convenience of explanation, the respective structures are described in a list manner, but each structure can be one structure composed of at least two structures, or one structure can be divided into a plurality of structures to perform functions. The unified and separated embodiments of the above structures all belong to the scope of the present invention without departing from the essence of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The structure and the effect of the present invention will be more clear through the following description.
Fig. 1 is a drawing illustrating the structure of a bidirectional switch contact device according to the related art.
As shown in fig. 1, in the conventional bidirectional switch device, arc extinguishing magnets 10, which are permanent magnets for arc extinguishing, are provided outside both ends of a movable contact 07, and the arc extinguishing magnets 10 are fixed inside an arc cover 11 positioned at an upper portion in the drawing.
When power is applied to the coil 01, the movable iron core 02, the fixed iron core 03, the yoke 04, and the yoke plate 05, which can move by the current of the coil 01, are magnetized, and the movable iron core 02 moves toward the yoke plate 05. At this time, the movable iron core 02 structurally connected moves together with the moving shaft 06, and the movable contact 07 can be brought into contact with the fixed contact 08 located at the upper portion by contacting the moving shaft 06. At the moment when the fixed contact 08 contacts the movable contact 07, the contact pressure spring 09 acts to apply a contact pressure.
On the other hand, when the power of the coil 01 is turned OFF (OFF), the movable iron core 02, the fixed iron core 03, the yoke 04, and the yoke plate 05 are demagnetized, the movable iron core 02 is restored by the force of the return spring 12, and the movable contact 07 is structurally separated from the fixed contact 08.
When a current flows between the fixed contact 08 and the movable contact 07, if the fixed contact 08 and the movable contact 07 are separated, an arc is generated therebetween. At this time, the arc is moved by the arc extinguishing magnet 10 to achieve arc extinguishing.
However, in the conventional bidirectional switch device, a pair of quenching magnets 10 is disposed outside the movable contact 07, and the distance between the two quenching magnets 10 is large, which causes a problem of a decrease in quenching capability. Further, since the distance between the fixed contacts 08 is short, an insulation problem such as insulation breakdown is caused structurally.
Fig. 2 is a sectional view illustrating the structure and operation of a bidirectional switch contact device according to an embodiment of the present invention.
In the present invention, when power is applied to the magnetizing coil 101, a magnetic flux is generated in the movable iron core 102 by the current of the magnetizing coil 101, and the movable iron core moves toward the yoke plate 105, and the moving shaft 106 structurally connected to the movable iron core 102 moves upward. At this time, the movable contact 107 fixed to the moving shaft 106 is moved upward by the contact spring 109, and both ends of the pair of fixed contacts 108 are structurally connected, and the fixed contacts 108 and the movable contact 107 are conductors, so that electrical connection is achieved.
On the other hand, when the current flowing through the magnetizing coil 101 is removed to cut off the load current, the movable iron core 102 is demagnetized, the movable iron core 102 and the movable contact 107 return to the lower part by the force of the contact pressure spring 106 and the return spring 112, and an insulating space is generated between the movable contact 107 and the fixed contact 108.
At this time, a high-temperature arc is generated by cutting off a large current at the moment when the fixed contact 108 and the movable contact 107 are separated. The arc extinguishing permanent magnet 110 for arc extinguishing disposed inside the pair of fixed contacts 108 allows the high-temperature arc current to be rapidly moved to extinguish the high-temperature arc, and the insulation between the fixed contacts 108 and the movable contact 107 can be restored.
Therefore, according to the utility model discloses a bidirectional switch contact device through dispose arc extinguishing permanent magnet 110 between two fixed contact 108 for the direction of magnetic flux is crossing with arc current's direction right angle, sets up arc extinguishing portion, makes arc current be the direction that comes out from ground for one side, and the opposite side is the direction that gets into ground, makes arc current can not meet. And the direction of the arc current is changed when the direction of the current is changed, so that the direct current switch device can cut off the bidirectional current by simplifying and miniaturizing the device.
Fig. 3 is a diagram illustrating a structure of a bidirectional switch contact device according to an embodiment of the present invention, in which a fixed contact, a movable contact, and an arc extinguishing permanent magnet are disposed.
As shown in fig. 3, according to the present invention, the arc extinguishing permanent magnet 110 is located between the pair of fixed contacts 108, and the movable contact 107 is located below the arc extinguishing permanent magnet 110, so that this structure not only improves the arc extinguishing function, but also makes full use of the limited space of the small-sized switchgear.
When the movable core 102 is moved upward by the force of the magnetizing coil 101, for example, when the movable contact 107 formed in a U shape contacts the fixed contacts 108, the fixed contacts 108 are kept in an electrically energized state, and when the movable core 102 is moved downward after the magnetizing coil 101 is turned off, the movable contact 107 is separated from the fixed contacts 108. When a current flows in a load, when the fixed contact 108 and the movable contact 107 are separated from each other, an electric arc is generated between the fixed contact 108 and the movable contact 107, and at this time, the arc extinguishing permanent magnets 110 existing inside the two fixed contacts 108 rapidly extinguish the generated arc.
Fig. 4 is a diagram illustrating the function of an arc extinguishing permanent magnet according to an embodiment of the present invention.
The path of the arc travel is determined based on the magnetic flux of the quenching permanent magnet 110 crossing the current. As shown in fig. 4, the force F1 generated by the load current I crossing the magnetic flux of the quenching magnet and the force F2 act in opposite directions all the time, and thus, since the arc currents do not meet, a short circuit does not occur between the arcs. Since the arc extinguishing permanent magnets 110 hold magnetic fluxes in the same direction, when the current direction changes, the arc moving direction differs, and even if the current direction changes, no arc extinguishing problem occurs.
In addition, the above configuration allows the arc current direction to change when the current direction changes, and the arc extinguishing permanent magnet is disposed to cut off both of the bidirectional currents in the dc switch device, thereby further simplifying and miniaturizing the bidirectional switch contact device.
Fig. 5 is a drawing illustrating a shape of an arc extinguishing permanent magnet according to an embodiment of the present invention.
As shown in fig. 5, the quenching permanent magnet 110 is formed with an intermediate space 110a in which the movable contact moves up and down. For example, the permanent magnet 110 may be formed in a U-shape to form the intermediate space 110a, and the permanent magnet 110 may include a pair of extension portions 110b extending in a direction perpendicular to the longitudinal direction at both ends thereof, and the intermediate space 110a for moving the movable contact may be formed between the pair of extension portions 110 b.
The intermediate space 110a of the quenching permanent magnet 110 forms a space in which the movable contact 107 can move up and down, thereby facilitating access, and the leg-like extensions 110b on both outer sides function to increase magnetic flux and thereby rapidly extinguish an arc generated at the contacts.
Fig. 6 is a drawing illustrating an arc cover and arc suppressing ceramic chamber structure according to an embodiment of the present invention.
As shown in fig. 6, a pair of arc-extinguishing ceramic chambers 115 are disposed on both sides inside the arc cover 111, and the fixed contact 108 is located at the center of each arc-extinguishing ceramic chamber 115. The space on both sides of the fixed contact 108 in each arc extinguishing ceramic chamber 115 can be used for arc extinguishing.
The ceramic arc extinguishing chamber 115 may be configured to seal 5 surfaces of the arc lid 111.
A space 111a in which the movable contact 107 moves is provided inside the arc cover 111.
The metal steam that takes place when the two-way switching device cuts off the two-way electric current destroys internal insulation easily, nevertheless the utility model discloses an arc extinguishing ceramic chamber 115 wraps up whole space, prevents that metal steam from getting into other fixed contact 108, blocks to destroy insulating phenomenon.
Fig. 7 is a diagram illustrating a combination relationship of detailed components of a bidirectional switch contact device according to an embodiment of the present invention.
As shown in fig. 7, the present invention can be configured by a yoke 104 of a metal material accommodating all the structural components, and a fixed iron core 103, a magnetizing coil 101, a movable iron core 102, a yoke plate 105, a moving shaft 106, a movable contact 107, a fixed contact 108, a contact spring 109, an arc extinguishing permanent magnet 110, an arc cover 111, a return spring 112, an insulating arc base 113, two ceramic plates 114, two arc extinguishing ceramic chambers 115, a permanent magnet cover 116, and the like constituting a magnetic circuit.
The fixed core 103 is located in the magnetizing coil 101, and the movable core 102 is located on the same axis as the fixed core 103, and a yoke plate 105 is disposed at the upper end thereof. An insulating arc base 113 for insulation is disposed on the yoke plate 105, and a ceramic plate 114 is disposed on the upper end thereof so as to face the arc extinguishing ceramic chamber 115. Above this is an arc cover 111 that encloses the arc chute ceramic cavity 115 and acts as an insulating and securing means.
Two arc extinguishing permanent magnets 110 are inserted from above the arc cover 111, and the permanent magnet cover 116 is fixed by a screw to prevent the arc extinguishing permanent magnets 110 from being detached.
Next, the operation of the switch will be described, in which when a current flows through the magnetizing coil 101, the fixed iron core 103, the yoke 104, the yoke plate 105, and the movable iron core 102 are magnetized, the movable iron core 102 moves upward and comes into close contact with the yoke plate 105, the movable iron core 102 connected to the structure moves together with the movable shaft 106, a stopper end for supporting the contact spring 109 is disposed at the upper end of the movable shaft 106, and the contact spring 109 is disposed at the upper end thereof. After that, the movable contact 107 is positioned on the touch pressure spring 109 so that the movable contact 107 contacts the fixed contact 108 in accordance with the movement of the movable iron core 102.
In contrast, when the current applied to the magnetizing coil 101 is turned off, all of it is demagnetized, the movable iron core 102 is moved away from the yoke plate 105 by the return spring 112 between the movable iron core 102 and the yoke plate 105, and the movable contact 107 is separated from the fixed contacts 108.
As described above, when a load current flows through the fixed contact 108 and the movable contact 107, an arc is formed between the movable contact 107 and the fixed contact 108 when the movable contact 107 is separated from the fixed contact 108, and arc extinguishing is performed between the arc extinguishing ceramic chamber 115 and the ceramic plate 114.
The embodiments shown in the description of the present invention are merely examples, and the present invention is not limited to the above embodiments. The scope of the present invention should be construed based on the claims, and all the techniques belonging to the equivalent scope should be construed as belonging to the scope of the present invention.
Claims (8)
1. The utility model provides a switch contact device, relates to the switch contact device who has the arc extinguishing function, characterized by includes:
a pair of fixed contacts for applying a direct current power;
a movable contact having both end portions contactable with the pair of fixed contacts;
at least one pair of permanent magnets disposed proximate to the pair of fixed contacts for arc extinction;
an arc cover formed with a space into which the permanent magnet is inserted; and
a sealing yoke has an opening at the upper part.
2. The switch contact device according to claim 1,
the arc extinguishing device is characterized by further comprising a pair of arc extinguishing ceramic cavities positioned on the inner side of the arc cover, two separated arc extinguishing spaces are formed through the pair of arc extinguishing ceramic cavities, and the fixed contacts are respectively arranged at the centers of the arc extinguishing ceramic cavities.
3. The switch contact device according to claim 1,
the pair of permanent magnets are all disposed between the pair of fixed contacts.
4. The switch contact device according to claim 1,
each of the permanent magnets includes a pair of extension portions extending in a direction perpendicular to the longitudinal direction at both ends, and a space for moving the movable contact is formed between the pair of extension portions.
5. The switch contact device according to claim 4,
the movable contact has a shape including a pair of extensions at both ends thereof, the extensions extending toward the fixed contact.
6. The switch contact device according to claim 1,
the pair of permanent magnets are configured such that a direction of magnetic flux based on the pair of permanent magnets intersects at right angles with an arc current direction when an arc is generated between the movable contact and the fixed contact.
7. The switch contact device according to claim 1,
the upper end of the switch contact device is sealed with ceramic, and the sealing yoke is welded to form a seal.
8. The utility model provides a switch contact device, relates to the switch contact device who has the arc extinguishing function, characterized by includes:
a pair of fixed contacts for applying a direct current power;
a movable contact having both end portions contactable with the pair of fixed contacts;
a pair of permanent magnets disposed adjacent to the pair of fixed contacts for arc extinction;
an arc cover formed with a space into which the permanent magnet is inserted; and
a sealing yoke having an opening at the upper part,
the pair of permanent magnets are all arranged side by side between the pair of fixed contacts,
each of the permanent magnets includes a pair of extension portions extending in a direction perpendicular to the longitudinal direction at both ends, a space for moving the movable contact is formed between the pair of extension portions, and a magnetic flux is increased by the pair of extension portions at the time of arc extinction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2018-0118372 | 2018-10-04 | ||
| KR1020180118372A KR101953292B1 (en) | 2018-10-04 | 2018-10-04 | Bidirectional switch contact device |
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| Publication Number | Publication Date |
|---|---|
| CN210167287U true CN210167287U (en) | 2020-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921169124.7U Active CN210167287U (en) | 2018-10-04 | 2019-07-23 | Bidirectional switch contact device |
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| Country | Link |
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| KR (1) | KR101953292B1 (en) |
| CN (1) | CN210167287U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113782391A (en) * | 2020-06-09 | 2021-12-10 | 比亚迪股份有限公司 | Relay with a movable contact |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102578555B1 (en) * | 2020-03-13 | 2023-09-14 | 엘에스일렉트릭(주) | Air circuit breaker |
| KR102207338B1 (en) * | 2020-07-07 | 2021-01-25 | 주식회사 와이엠텍 | Dc bidirectional contact device with arc extinguishment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5501057B2 (en) * | 2010-03-25 | 2014-05-21 | パナソニック株式会社 | Contact device |
| EP2637191A4 (en) * | 2010-11-01 | 2014-11-12 | Ngk Spark Plug Co | Relay |
| KR101581182B1 (en) * | 2015-03-26 | 2015-12-30 | 주식회사 와이엠텍 | Bi-direction Switching Device for using DC current with permanent magnet |
| KR101649703B1 (en) | 2015-07-17 | 2016-08-19 | 엘에스산전 주식회사 | Monitoring apparatus of contact adhesion for dc circuit breaker |
-
2018
- 2018-10-04 KR KR1020180118372A patent/KR101953292B1/en active IP Right Grant
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2019
- 2019-07-23 CN CN201921169124.7U patent/CN210167287U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113782391A (en) * | 2020-06-09 | 2021-12-10 | 比亚迪股份有限公司 | Relay with a movable contact |
| CN113782391B (en) * | 2020-06-09 | 2024-01-09 | 比亚迪股份有限公司 | Relay device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101953292B1 (en) | 2019-02-28 |
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