CN112635252A - Arc extinguishing structure of direct current contactor - Google Patents
Arc extinguishing structure of direct current contactor Download PDFInfo
- Publication number
- CN112635252A CN112635252A CN201910903401.0A CN201910903401A CN112635252A CN 112635252 A CN112635252 A CN 112635252A CN 201910903401 A CN201910903401 A CN 201910903401A CN 112635252 A CN112635252 A CN 112635252A
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- Prior art keywords
- arc extinguishing
- arc
- contact
- side wall
- permanent magnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
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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
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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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an arc extinguishing structure of a direct current contactor, which comprises an arc extinguishing cover, wherein a movable contact which is contacted with or separated from a fixed contact is arranged below a pair of fixed contacts which penetrate through the arc extinguishing cover and are located on the arc extinguishing cover, the movable contact is contacted with or separated from the fixed contacts to generate an arc, a permanent magnet for magnetically blowing out the arc is respectively arranged on the outer side of each fixed contact, the magnetic field direction of the permanent magnet is parallel to the direction of the central connecting line of the two fixed contacts, an arc extinguishing member which is made of ceramic materials is arranged between each fixed contact and the permanent magnet on the outer side corresponding to the fixed contact, and a side wall structure is arranged on each arc extinguishing member and is; the side wall structure is provided with an opening through which the arc blows for narrowing the arc. According to the invention, the area around the electric arc in the arc extinguish chamber is made of ceramic materials, so that the arc extinguish characteristic is enhanced, the electric arc can be extinguished quickly, and the arc extinguish performance of the direct current contactor is improved by combining the magnetic blow-out characteristic of the permanent magnet to the electric arc.
Description
Technical Field
The invention relates to the field of direct current contactors, in particular to an arc extinguishing structure of a high-voltage and high-current direct current contactor, which extinguishes direct current arcs through strong magnetic blow and an insulating component and prolongs the electrical service life of the direct current contactor.
Background
In recent years, with the development of new energy electric vehicles, charging piles and energy storage batteries, the application of a high-voltage direct-current contactor becomes more and more common and becomes a necessary electrical element for controlling the on-off of a direct-current circuit in the electric vehicle and the charging pile.
The direct current contactor generates electric arcs when a circuit with high voltage and large current is disconnected, direct current does not have zero crossing points which are convenient for the electric arcs to be extinguished like alternating current, so that the direct current electric arcs are not easy to be extinguished, and the temperature during electric arc combustion reaches thousands of degrees, so that the contact and other parts in the contactor are greatly damaged, and the electric service life of a product is influenced. The existing product utilizes the magnetic blow-out mode of the permanent magnet to extinguish arc usually, the structural component of the arc extinguish chamber is made of ceramic materials or plastic materials, however, the ceramic parts can not form an integrated arc extinguish chamber which is provided with an arc extinguish grid sheet structure and surrounds the periphery of a contact due to process limitation, the arc extinguish chamber made of the plastic materials cannot resist the arc and generates other gas impurities after ablation, the purity of gas media in the arc extinguish chamber is influenced, and therefore the arc extinguish chamber made of two single materials has certain defects and influences the arc extinguishing performance of the direct current contactor.
Based on the above, it is actually necessary to develop an arc extinguishing structure that combines the advantages of ceramic materials and plastic materials to improve the arc extinguishing performance of the dc contactor and prolong the service life of the dc contactor.
Disclosure of Invention
The invention aims to provide an arc extinguishing structure of a direct current contactor, which combines the advantages of two materials, namely a ceramic material and a plastic material, adopts the ceramic material in the area around the electric arc in an arc extinguishing chamber, increases the arc extinguishing characteristic on the structure of a ceramic piece and is beneficial to quickly extinguishing the electric arc; meanwhile, the structure of the fixed contact arranged in the area far away from the electric arc is made of a plastic material, the contact and other structural members are positioned by utilizing the advantage of easiness in forming of the plastic material, and the arc extinguishing performance of the direct current contactor is improved by combining the magnetic blowing characteristic of the permanent magnet to the electric arc.
In order to achieve the purpose, the invention is realized by the following scheme:
an arc extinguishing structure of a direct current contactor comprises an arc extinguishing cover, a movable contact which is in contact with or separated from a fixed contact is arranged below a pair of fixed contacts which penetrate through the arc extinguishing cover and are located on the arc extinguishing cover, the movable contact is in contact with or separated from the fixed contacts, a permanent magnet is arranged on the outer side of each fixed contact, an arc extinguishing part made of ceramic materials is arranged between each fixed contact and the corresponding permanent magnet on the outer side of the fixed contact, and a side wall structure is arranged on each arc extinguishing part and used for blocking at least part of electric arcs and/or increasing the creeping distance of the electric arcs; the side wall structure is provided with an opening for the electric arc to blow through, and the opening is used for narrowing the electric arc.
Preferably, the magnetic field direction of the permanent magnet is parallel to the direction of the connecting line of the centers of the two static contacts; the length direction of the side wall structure is parallel to the direction of the connecting line of the centers of the two static contacts or forms a set included angle.
Preferably, the side wall structure comprises at least one set of side walls provided with a first side wall and a second side wall; the length directions of the first side wall and the second side wall are respectively parallel to the direction of a connecting line of the centers of the two static contacts, and an opening is formed between the first side wall and the second side wall; the first side wall and the second side wall are of two mutually independent structures, and/or the first side wall and the second side wall are made into a whole body, and at least one part of the first side wall and the second side wall is provided with an opening.
Preferably, square metal sleeves made of metal magnetic materials are arranged on the outer sides of the arc extinguishing cover and the permanent magnet, and two adjacent surfaces of each metal sleeve are in transition through a fillet; the inner side wall of the metal sleeve is in direct contact with the permanent magnet, the contact part of the inner side wall of the metal sleeve is a plane, or a thin-wall part is arranged between the inner side wall of the metal sleeve and the permanent magnet.
Preferably, the arc-extinguishing cover and the inner side of the metal sleeve are tightly matched and are jointly placed in a shell, epoxy resin is filled at the upper part of the shell, and the whole metal sleeve, the whole arc-extinguishing cover and at least one part of the static contact are covered.
Preferably, the arc extinguishing piece is provided with a protruding edge structure which is matched with a wall groove on the arc extinguishing cover so as to be fixedly connected; and/or the arc extinguishing cover is provided with a protruding edge structure which is matched with the wall groove on the arc extinguishing piece so as to be fixedly connected.
Preferably, the movable contact is in a bow shape and comprises a middle part and two outer end parts, the heights of the two outer end parts are lower than that of the middle part, and planes of the two outer ends are respectively contacted with or separated from the two fixed contacts.
Preferably, the section of the part of the static contact, which is in contact with the moving contact, is semicircular, and the bottom edge of the static contact is provided with a chamfer or fillet arc striking structure.
Preferably, the arc extinguishing member partially surrounds the permanent magnet to separate the permanent magnet from the stationary contact; the upper end of the arc extinguishing piece is in contact with the inner surface of the top of the arc extinguishing cover, and the lower end of the arc extinguishing piece is in contact with an insulating support.
Preferably, the permanent magnet is arranged between the arc extinguishing chamber and the insulating support in the vertical direction and is limited by the arc extinguishing chamber and the insulating support.
Compared with the prior art, the invention has the beneficial effects that: (1) according to the invention, the ceramic part is arranged between the static contact and the permanent magnet, and the ceramic part is structurally provided with the side wall and the opening for arc extinction, so that the arc can be extinguished quickly; (2) the permanent magnet is connected with the inner side wall of the sleeve on the outer side of the permanent magnet, the magnetic field intensity is increased, and the sleeve is square, so that the thickness maximization of the permanent magnet is realized under the condition that the peripheral dimensions of the sleeve are the same, the magnetic field intensity is larger, and electric arcs are extinguished in a shorter time; (3) the moving contact is in a bent bow shape, compared with the moving contact with a flat plate structure, the moving contact with the bow structure can increase the opening distance between the moving contact and the static contact, the opening distance can be increased to draw the electric arc longer, the electric arc is extinguished favorably, more electric arcs are cooled on the side wall of the ceramic part, meanwhile, the opening distance is increased to reduce the reignition times of the electric arc, the ablation of the electric arc on the contact is reduced, and the service life of the direct current contactor is prolonged.
Drawings
Fig. 1 is a front sectional view of a dc contactor according to the present invention;
FIG. 2 is a side cross-sectional view of the DC contactor of the present invention;
fig. 3 is a partial perspective view of an arc extinguishing member of the dc contactor according to the present invention;
fig. 4 is a top view of the dc contactor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1-4, the invention discloses an arc extinguishing structure of a dc contactor, which comprises an arc extinguishing chamber 2, and a movable contact assembly 9 matched with a fixed contact 1 is arranged below a pair of fixed contacts 1 passing through and located on the arc extinguishing chamber 2. The static contact 1 is made of metal material and can be integrated or assembled with the arc extinguishing chamber 2 which is formed by plastic in an injection molding way. The moving contact component 9 comprises moving contacts 7, and each fixed contact 1 is in contact with or disconnected from a corresponding moving contact 7, so that the main circuit is switched on or off.
In this embodiment, a permanent magnet 4 is respectively disposed on the outer side of each stationary contact 1 along the direction of the center connecting line of the two stationary contacts 1, and the magnetic field direction of the permanent magnet 4 is parallel to the direction of the center connecting line of the two stationary contacts. A square metal sleeve 3 is arranged outside the arc extinguishing chamber 2 and the permanent magnet 4. The permanent magnet 4 is arranged between the arc-extinguishing chamber 2 and an insulating bracket 5 in the vertical direction and is limited by the arc-extinguishing chamber 2 and the insulating bracket 5.
As shown in fig. 1 to 4, an arc extinguishing member 6 made of a ceramic material is provided between each stationary contact 1 and its corresponding outer permanent magnet 4. The upper end surface 604 of the arc extinguishing member 6 is in contact with the inner surface of the top of the arc chute 2 and the lower end of the arc extinguishing member 6 is in contact with the insulating support 5. An arc-extinguishing member 6 of ceramic material partially encloses the permanent magnet 4 and isolates the permanent magnet 4 from the stationary contact 1.
The arc extinguishing cover 2 is matched with an arc extinguishing part 6 made of ceramic materials to form an arc extinguishing chamber surrounding the two fixed contacts 1, and a gas arc extinguishing medium is filled in the arc extinguishing chamber. A coil 8 is arranged below the insulating support 5, an iron core 10 is arranged inside the coil 8, the iron core 10, a shaft 11, a moving contact 7, a spring and the like form a moving contact assembly 9 (the structure of the moving contact assembly 9 adopts the prior art), the moving contact assembly 9 penetrates through a hole in the middle of the insulating support 5, the upper part of the moving contact assembly is positioned in an arc extinguishing chamber enclosed by the arc extinguishing cover 2 and the arc extinguishing member 6, and the lower part of the moving contact assembly is positioned inside the coil 8.
As shown in fig. 1, the arc-extinguishing chamber 2 is closely fitted with the inner side wall of the square metal sleeve 3 and is placed together in the housing 12, and the upper portion of the housing 12 is filled with epoxy resin for sealing the cavity formed by the square metal sleeve 3 and the arc-extinguishing chamber 2 in the housing 12, and the cavity of the metal sleeve 3 is filled with a gas medium for cooling the arc. The middle part of the static contact 1 is wrapped by epoxy resin, the upper part of the static contact 1 extends out of the shell 12 for wiring, and the lower part of the static contact 1 is positioned in the arc extinguishing chamber and is connected or disconnected with the movable contact 7.
When the coil 8 is electrified, the moving contact component 9 moves upwards to make the moving contact 7 contact with the static contact 1, and the main circuit is conducted; when the coil 8 is powered off, the moving contact component 9 returns to the initial position, the moving contact 7 is separated from the static contact 1 to disconnect the main circuit, namely, the electric signal of the coil 8 controls the connection and disconnection of the main circuit to realize the switching function. An electric arc is generated at the moment when the movable contact 7 is contacted with and disconnected from the static contact 1, and the energy of the electric arc is larger when the current and the voltage are larger.
Therefore, in order to rapidly extinguish the arc, the permanent magnet 4 is used for realizing magnetic quenching, the magnetic field direction (on the horizontal plane) of the permanent magnet 4 is perpendicular to the current direction (vertical direction) between the movable contact 7 and the fixed contact 1, meanwhile, the magnetic field direction of the permanent magnet 4 is parallel to the direction of the central connecting line of the two fixed contacts, according to the left-hand rule principle, the direction of the lorentz force (magnetic blowing force) borne by the arc is approximately perpendicular to the central connecting line of the two fixed contacts, and the generated arc is blown out by the lorentz force (magnetic blowing force) along the direction approximately perpendicular to the central connecting line of the two fixed contacts 1.
In order to help the electric arc to extinguish, a side wall structure is arranged on the arc extinguishing part 6, and a certain distance exists between the side wall structure and the static contact 1, so that the electric arc is increased along a creeping path of an insulating material, and the electric arc is helped to be cooled; and the side wall structure is provided with an opening feature, the position of the opening feature is matched with the positions of the two fixed contacts and the permanent magnet, so that the opening feature is aligned with the direction of the arc blown out by the magnetic blowing force, and the existence of the opening enables the arc to be narrowed and the arc voltage to be increased, thereby being beneficial to arc extinction.
As shown in fig. 2 and fig. 3, a plurality of sets (for example, two sets of sidewall sets 600 are shown in the figure, but not limited thereto) of sidewall sets 600 are disposed on the arc extinguishing member 6 between each stationary contact 1 and the permanent magnet 4, a certain distance exists between the sidewall sets 600 and the stationary contact 1, and an opening C is disposed on the sidewall sets 600. Adjacent sidewall sets 600 are spaced apart by a distance. Wherein each sidewall group 600 comprises a first sidewall 601 and a second sidewall 602. The first sidewall 601 and the second sidewall 602 in each sidewall group 600 may be separate components, with an opening C between the first sidewall 601 and the second sidewall 602; alternatively, the first sidewall 601 and the second sidewall 602 in each set of sidewalls are made as one body and the opening C is left in the middle portion.
Preferably, the length directions of the first side wall 601 and the second side wall 602 are both approximately parallel to the central connecting line of the two stationary contacts. The distances between the first sidewall 601 and the second sidewall 602 in each sidewall set 600 to the center connecting line of the stationary contact may be the same or different, and the present invention is not limited thereto as long as it can ensure that the arc grows along the creeping path of the insulating material to help cool the arc.
Thus, after the arc is blown to the first sidewall 601 and the second sidewall 602 on the arc extinguishing member 6 made of the ceramic material due to the lorentz force (magnetic blowing force), the arc is rapidly cooled because the ceramic has the characteristics of high temperature resistance and arc resistance, and an opening C is formed between the first sidewall 601 and the second sidewall 602, so that part of the arc is blocked by the first sidewall 601 and the second sidewall 602 to realize cooling, and part of the arc is blown out along the edge of the opening C of the first group of sidewall groups in sequence under the action of the magnetic blowing force and continuously blown to the next group of sidewall groups until the arc is extinguished.
Therefore, the presence of the group of side walls of the arc-extinguishing member 6 made of ceramic material of the present invention makes the arc grow along the path of the insulating material, contributing to cooling the arc, and the presence of the opening C narrows the arc, and the increase of the arc voltage contributes to extinguishing the arc, since the higher the arc voltage, the less easily the power supply voltage is maintained, and the smaller the current of the arc becomes and the easier it is to extinguish. The path where the arc travels is a curved path formed by passing through the first group of sidewall group openings and the second group of sidewall group openings of the arc extinguishing member from the bottom of the static contact in sequence until the arc is extinguished, as shown by a curve a in fig. 2.
In the present invention, there is no limitation on the magnetism of the permanent magnet 4, and the shape, position, and direction of the sidewall structure of the arc extinguishing member 6 are not limited, so long as the lorentz force can smoothly blow the arc toward the sidewall and opening of the arc extinguishing member 6 to help extinguish and narrow the arc.
In addition, it is worth to be noted that the sidewall group on each side of the center connecting line of the two stationary contacts of the present invention may include a group of sidewalls, two groups of sidewalls, and other groups of sidewalls, and the larger the number of the sidewall groups is, the better the arc extinguishing effect is.
As shown in fig. 2, the cross section of the bottom (the portion in contact with the movable contact) of the stationary contact 1 is approximately semicircular, and an arc striking feature 101 in the form of a chamfer or a fillet is provided at the edge of the bottom of the stationary contact 1.
The arc extinguishing member 6 and the arc extinguishing cover 2 are fixed through the outer edge, namely the outer protruding edge 603 of the ceramic arc extinguishing member 6 is vertically embedded into the corresponding wall groove 201 of the arc extinguishing cover 2, so that the limit in the horizontal direction is realized; the fixing method can also be designed to arrange a wall groove on the ceramic arc extinguishing member 6, and the protruding edge of the arc extinguishing cover 2 is inserted into the wall groove of the arc extinguishing member 6, but the invention is not limited to this, as long as the fixed connection function of the arc extinguishing member 6 and the arc extinguishing cover 2 can be realized.
As shown in fig. 1 and 4, the adjacent two sides of the square metal sleeve are transited by rounded corners 301. The square metal sleeve 3 is made of a metal magnetic conductive material. The inner side wall of the metal sleeve 3 and the permanent magnet 4 can be in direct contact, and the contact part is a plane, or a thin-wall object is arranged between the inner side wall of the metal sleeve 3 and the permanent magnet for indirect connection. Because permanent magnet 4 and the inside wall direct contact of sleeve 3 or indirect connection, can increase magnetic field intensity, and because this sleeve 3 is square makes to realize the permanent magnet thickness maximize under the same circumstances of its peripheral dimensions (prior art designs this sleeve into cylindrical more, and its arc lateral wall has restricted the increase of permanent magnet thickness), consequently this design can make magnetic field intensity bigger, electric arc is extinguished in shorter time.
As shown in fig. 1, the moving contact 7 of the present invention is shaped as a bow, and includes a middle portion and two outer end portions, the middle portion and the two outer end portions are both transited through a curved surface, the heights of the two outer end portions are lower than the middle portion, and the planes of the two outer ends are respectively contacted with or separated from the two stationary contacts. When the moving contact 7 is in an open state, the contact part of the moving contact and the static contact can be far away from the static contact, and under the condition that the position of the static contact is fixed, compared with the moving contact with a flat plate structure in the prior art, the moving contact 7 with the arch structure can increase the opening distance between the moving contact and the static contact, the arc can be pulled longer by increasing the opening distance, the arc is extinguished favorably, more arcs are cooled on the side wall of a ceramic arc extinguishing part, the times of reignition of the arc can be reduced by increasing the opening distance, the ablation of the arc on the contact is reduced, and the service life of the direct current contactor is prolonged.
In conclusion, the invention combines the advantages of the ceramic material and the plastic material, not only adopts the ceramic material in the area around the electric arc in the arc extinguish chamber, but also adds the arc extinguish characteristic on the structure of the ceramic piece, thus being beneficial to fast extinguishing the electric arc; meanwhile, the structure of the fixed contact arranged in the area far away from the electric arc is made of a plastic material, the contact and other structural members are positioned by utilizing the advantage of easiness in forming of the plastic material, and the arc extinguishing performance of the direct current contactor is improved by combining the magnetic blowing characteristic of the permanent magnet to the electric arc.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. An arc extinguishing structure of a direct current contactor comprises an arc extinguishing cover (2), a movable contact (7) which is in contact with or separated from a pair of static contacts (1) penetrating through the arc extinguishing cover (2) and located on the arc extinguishing cover is arranged below the static contacts (1), the movable contact (7) is in contact with or separated from the static contacts (1), the arc extinguishing structure is characterized in that a permanent magnet (4) is arranged on the outer side of each static contact (1), an arc extinguishing member (6) made of ceramic materials is arranged between each static contact (1) and the corresponding permanent magnet (4) on the outer side of the static contact, and a side wall structure is arranged on each arc extinguishing member (6) and used for blocking at least part of electric arcs and/or increasing the creeping distance of the electric arcs; the side wall structure is provided with an opening for the electric arc to blow through, and the opening is used for narrowing the electric arc.
2. The arc extinguishing structure of the DC contactor according to claim 1,
the magnetic field direction of the permanent magnet (4) is parallel to the direction of the connecting line of the centers of the two static contacts;
the length direction of the side wall structure is parallel to the direction of the connecting line of the centers of the two static contacts or forms a set included angle.
3. The arc extinguishing structure of a direct current contactor according to claim 1 or 2, characterized in that the sidewall structure comprises at least one set of sidewalls, the set of sidewalls being provided with a first sidewall (601) and a second sidewall (602);
the length directions of the first side wall (601) and the second side wall (602) are respectively parallel to the direction of a connecting line between the centers of the two fixed contacts, and an opening is formed between the first side wall (601) and the second side wall (602);
the first side wall (601) and the second side wall (602) are two structures independent of each other, and/or the first side wall (601) and the second side wall (602) are made into a whole and at least one part of the first side wall and the second side wall is provided with an opening.
4. The arc extinguishing structure of the DC contactor according to claim 1,
the outer sides of the arc extinguishing cover (2) and the permanent magnet (4) are provided with square metal sleeves (3) made of metal magnetic materials, and two adjacent surfaces of the metal sleeves (3) are transited through fillets;
the inner side wall of the metal sleeve (3) is in direct contact with the permanent magnet (4), the contact part is a plane, or a thin-wall part is arranged between the inner side wall of the metal sleeve (3) and the permanent magnet (4).
5. The arc extinguishing structure of the DC contactor according to claim 1,
the arc extinguishing cover (2) is matched with the inner side of the metal sleeve (3) and is jointly placed in a shell (12), epoxy resin is filled at the upper part of the shell (12), and the whole metal sleeve (3), the whole arc extinguishing cover (2) and at least one part of the static contact (1) are covered.
6. An arc extinguishing structure of a direct current contactor according to claim 1 or 5, characterized in that the arc extinguishing member (6) is provided with a protruding edge structure matched with a wall groove on the arc extinguishing chamber (2) for fixed connection; and/or the arc extinguishing cover (2) is provided with a protruding edge structure which is matched with a wall groove on the arc extinguishing piece (6) to be fixedly connected.
7. The arc extinguishing structure of the DC contactor according to claim 1,
the moving contact (7) is in a bow shape and comprises a middle part and two outer end parts, the heights of the two outer end parts are lower than that of the middle part, and planes of the two outer ends are respectively contacted with or separated from the two static contacts.
8. The arc extinguishing structure of the direct current contactor according to claim 1 or 7, characterized in that the section of the part of the static contact (1) contacting with the moving contact (7) is semicircular, and the bottom edge of the static contact (1) is provided with a chamfer or fillet type arc striking structure (101).
9. The arc extinguishing structure of the DC contactor according to claim 1,
the arc extinguishing piece (6) partially surrounds the permanent magnet (4) to separate the permanent magnet (4) from the static contact (1);
the upper end of the arc extinguishing piece (6) is in contact with the inner surface of the top of the arc extinguishing cover (2) and the lower end of the arc extinguishing piece (6) is in contact with an insulating support (5).
10. The arc extinguishing structure of the DC contactor according to claim 1,
the permanent magnet (4) is arranged between the arc extinguishing chamber (2) and the insulating support (5) in the vertical direction, and the arc extinguishing chamber (2) and the insulating support (5) are limited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903401.0A CN112635252A (en) | 2019-09-24 | 2019-09-24 | Arc extinguishing structure of direct current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903401.0A CN112635252A (en) | 2019-09-24 | 2019-09-24 | Arc extinguishing structure of direct current contactor |
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| Publication Number | Publication Date |
|---|---|
| CN112635252A true CN112635252A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910903401.0A Pending CN112635252A (en) | 2019-09-24 | 2019-09-24 | Arc extinguishing structure of direct current contactor |
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| CN (1) | CN112635252A (en) |
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- 2019-09-24 CN CN201910903401.0A patent/CN112635252A/en active Pending
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