CN109119291B - Arc extinguishing structure of direct current contactor - Google Patents
Arc extinguishing structure of direct current contactor Download PDFInfo
- Publication number
- CN109119291B CN109119291B CN201811050036.5A CN201811050036A CN109119291B CN 109119291 B CN109119291 B CN 109119291B CN 201811050036 A CN201811050036 A CN 201811050036A CN 109119291 B CN109119291 B CN 109119291B
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- China
- Prior art keywords
- permanent magnets
- permanent magnet
- contactor
- fractures
- contact assembly
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- 230000003068 static effect Effects 0.000 claims abstract description 5
- 230000005404 monopole Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
- H01H50/38—Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
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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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides a direct current contactor arc extinguishing structure, it includes moving contact subassembly (1) and static contact subassembly (2), its characterized in that: the movable contact assembly (1) and the fixed contact assembly (2) are connected in series to form a direct current contactor main loop with four fractures (a, b, c, d), at least 2 permanent magnets are arranged on the outer sides of areas formed by the four fractures (a, b, c, d) in an end-to-end connection mode in sequence, the permanent magnets on the outer sides of the fractures in the same current direction are located on the same magnetic pole direction on one side of the fracture surface when the movable contact assembly (1) and the fixed contact assembly (2) are connected, and the permanent magnets on the outer sides of the fractures in different current directions are located on the other side of the fracture surface. The arc extinguishing structure of the direct current contactor adopts a monopole four-breakpoint series connection mode in a main loop. The permanent magnet magnetic blow arc extinguishing is adopted in the monopole contactor with four fractures, the switching-on and switching-off capacity of the direct current contactor is greatly improved while the volume of the contactor is not increased, and the purpose of small volume and high switching-off can be realized by switching on and switching-off higher main loop voltage.
Description
Technical Field
The invention belongs to the technical field of direct current contactors, and particularly relates to an arc extinguishing structure of a direct current contactor.
Background
Dc contactors are commonly used in vehicles using a battery as an energy source to control a plurality of operations such as vehicle start and speed regulation. With the rapid development of electric vehicles, the rated voltage requirement of the market on the direct current contactor is higher and higher. Since the volume of the dc contactor is determined by the rated current, the contact space is closed. The most main factor affecting the switching-on and switching-off capacity of the direct current contactor is the switching-on voltage, and the higher the switching-on voltage of the direct current contactor is, the less likely the switching-on and switching-off is, the more difficult the conventional moving contact scheme is to meet the requirements of switching-on and switching-off high voltage.
Chinese patent grant publication number CN206250126U discloses a dc contactor, the dc contactor comprising: the direct current contactor comprises a moving contact and a fixed contact, wherein a space is reserved between the moving contact and the fixed contact, a magnetic part is arranged around the space, an arc extinguishing magnetic field is generated by the magnetic part, and a magnetic conduction part is arranged around the space and positioned at the outer side of the magnetic part so as to weaken the magnetic force at the outer side of the magnetic part; the edge magnetic flux leakage of one end of the permanent magnet is reduced, the magnetic field intensity of an arc extinguishing working area is enhanced, and therefore the arc extinguishing capability of a product is improved. However, when the direct current contactor is used in a high-voltage occasion, the problem that the arc is continuously burnt in breaking exists.
Disclosure of Invention
The invention aims to solve the technical problem that when the existing direct current contactor is switched on and off, the electric arc is difficult to extinguish when the direct current high voltage is switched on and off, and provides an arc extinguishing structure of the direct current contactor. The permanent magnet magnetic blow arc extinguishing is adopted in the monopole contactor with four fractures, the switching-on and switching-off capacity of the direct current contactor is greatly improved while the volume of the contactor is not increased, and the purpose of small volume and high switching-off can be realized by switching on and switching-off higher main loop voltage.
Technical proposal
In order to achieve the technical purpose, the invention relates to an arc extinguishing structure of a direct current contactor, which comprises a moving contact assembly and a static contact assembly, wherein the connection and disconnection of the moving contact assembly and the static contact assembly can control the on-off of the direct current contactor, and the arc extinguishing structure is characterized in that: the movable contact assembly and the fixed contact assembly are connected in series to form a direct current contactor main loop with four fractures, at least 2 permanent magnets are arranged on the outer sides of the four fractures in sequence in an end-to-end connection forming area, and the permanent magnets on the outer sides of the fractures in the same current direction are located in the same magnetic pole direction on one side of the fracture surface when the movable contact assembly and the fixed contact assembly are connected, and the permanent magnets on the outer sides of the fractures in different current directions are located in different magnetic pole directions on one side of the fracture surface.
Further, 2 permanent magnets are arranged on the outer side of the area formed by sequentially connecting the four fractures end to end, the permanent magnets are a first permanent magnet and a second permanent magnet, the shape of the first permanent magnet is the same as that of the second permanent magnet, the first permanent magnet is magnetized in the forward direction, and the second permanent magnet is magnetized in the reverse direction.
Further, the first permanent magnet and the second permanent magnet are square or arc-shaped.
Further, the outer side of the area formed by connecting the four fractures end to end in sequence is provided with a permanent magnet, the 4 permanent magnets comprise two permanent magnets III and two permanent magnets IV, and the permanent magnets III and the permanent magnets IV are square or arc-shaped.
Further, the third permanent magnet is positively charged, and the fourth permanent magnet is negatively charged.
Further, the moving contact assembly and the fixed contact assembly are connected in series to form a Z-shaped main loop.
Advantageous effects
According to the arc extinguishing structure of the direct current contactor, two moving contact blades are arranged on one shaft inside a monopole contactor, and a main loop adopts a monopole four-breakpoint series connection mode. The permanent magnet magnetic blow arc extinguishing is adopted in the monopole contactor with four fractures, the switching-on and switching-off capacity of the direct current contactor is greatly improved while the volume of the contactor is not increased, and the purpose of small volume and high switching-off can be realized by switching on and switching-off higher main loop voltage.
Drawings
Fig. 1 is a structural diagram of the product of embodiment 1 of the present invention.
Fig. 2 is a schematic view of arc stress in embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of the permanent magnet arrangement of embodiment 2 of the present invention.
Fig. 4 is a schematic diagram of the permanent magnet arrangement of embodiment 3 of the present invention.
Fig. 5 is a schematic diagram of the permanent magnet arrangement of embodiment 4 of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Example 1
As shown in fig. 1, one embodiment of the present invention is a dc contactor arc extinguishing structure, which includes a moving contact assembly 1 and a fixed contact assembly 2, where the engagement and disengagement of the moving contact assembly 1 and the fixed contact assembly 2 can control the on-off of the dc contactor. The moving contact assembly 1 comprises a first moving contact 101 and a second moving contact 102, the moving contact assembly 2 comprises a first moving contact 201, a second moving contact 202 and a third moving contact 203, the first moving contact 201 and the second moving contact 202 respectively correspond to moving contacts at two ends on one of diagonal lines at two ends of the first moving contact 101 and the second moving contact 102, and two moving contacts 203a and 203a' of the third moving contact 203 respectively correspond to moving contacts at two ends on the other of the diagonal lines at two ends of the first moving contact 101 and the second moving contact 102 in series to form a Z-shaped main loop with four breaks a, b, c and d.
As shown in fig. 2, the outer sides of the four fracture parts a, b, c and d are sequentially connected end to form a region, 4 permanent magnets are arranged at the outer sides of the region, the N poles of the permanent magnets are from the inner side to the outer side, the 4 permanent magnets comprise two permanent magnets three 303,303 'and two permanent magnets four 304 and 304', and the permanent magnets three 303,303 'and the permanent magnets four 304 and 304' are arc-shaped.
The third permanent magnet 303,303 'is positively charged, and the fourth permanent magnet 304,304' is negatively charged.
In the working process of the embodiment, as shown in fig. 2, when the movable contact assembly 1 and the fixed contact assembly 2 are separated, four fractures a, b, c and d are formed, and the four fractures generate electric arcs when the movable contact assembly 1 and the fixed contact assembly 2 are just separated. The arc is elongated under the action of the magnetic blowing force F generated by the third permanent magnet 303,303 'and the fourth permanent magnets 304,304', and finally the arc is extinguished quickly. If the DC contactor is reversely wired, the arc is reversely elongated under the magnetic blowing force generated by the third 303,303 'and fourth 304,304' permanent magnets, and the arc is also quickly extinguished.
Example 2
As shown in fig. 3, the present invention also provides an embodiment in which the third permanent magnet 303,303 'and the fourth permanent magnet 304,304' can also be square, and other structures are the same as those of embodiment 1.
Example 3
As shown in fig. 4, in an embodiment of the present invention, 2 permanent magnets are disposed outside the four fracture surfaces a, b, c, d, which are sequentially connected end to form a region, and the permanent magnets outside the fracture surfaces in the same current direction are located in the same magnetic pole direction on one side of the fracture surface when the moving contact assembly 1 and the fixed contact assembly 2 are connected, and the permanent magnets outside the fracture surfaces in different current directions are located in different magnetic pole directions on one side of the fracture surface.
The outer sides of the four fracture parts a, b, c and d are sequentially connected end to form a region, 2 permanent magnets are arranged at the outer sides of the region, N poles of the permanent magnets are inwards from S poles to S poles of the permanent magnets, the 2 permanent magnets are a first permanent magnet 301 and a second permanent magnet 302, the shape of the first permanent magnet 301 is the same as that of the second permanent magnet 302, the first permanent magnet 301 is positively charged, and the second permanent magnet 302 is reversely charged.
The first permanent magnet 301 and the second permanent magnet 302 are arc-shaped.
In the working process of the embodiment, as shown in fig. 4, when the movable contact assembly 1 and the fixed contact assembly 2 are disconnected, four fractures a, b, c and d are formed by separating, and the four fractures generate electric arcs when the movable contact assembly 1 and the fixed contact assembly 2 are just separated. The arc is elongated by the magnetic blow force F' generated by the first permanent magnet 301 and the second permanent magnet 302, and finally the arc is extinguished rapidly. If the direct current contactor is reversely wired, the arc is reversely elongated under the action of magnetic blow force generated by the permanent magnet 301 and the permanent magnet 302, and the arc is also quickly extinguished.
Example 4
As shown in fig. 5, another embodiment of the present invention is that the first permanent magnet 301 and the second permanent magnet 302 are square, and the other structures are the same as those of embodiment 3.
According to the arc extinguishing structure of the direct current contactor, two moving contact blades are arranged on one shaft inside a monopole contactor, and a main loop adopts a monopole four-breakpoint series connection mode. The permanent magnet magnetic blow arc extinguishing is adopted in the monopole contactor with four fractures, the switching-on and switching-off capacity of the direct current contactor is greatly improved while the volume of the contactor is not increased, and the purpose of small volume and high switching-off can be realized by switching on and switching-off higher main loop voltage.
The structures, proportions, sizes, amounts, etc. shown in the drawings of the embodiments of the present invention are for illustration and description only, and should not be construed as limiting the invention, so that any structural modifications, proportional changes, or adjustments of size may fall within the scope of the invention without affecting the efficacy and achievement of the invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "anticlockwise" and the like are used in the present specification for convenience of description, and are not intended to limit the scope of the present invention, and the relative relation changes or modifications thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Claims (5)
1. The utility model provides a direct current contactor arc extinguishing structure, it includes moving contact subassembly (1) and static contact subassembly (2), moving contact subassembly (1) with the joint and the disconnection of static contact subassembly (2) can control direct current contactor's break-make, its characterized in that: the movable contact assembly (1) and the fixed contact assembly (2) are connected in series to form a direct current contactor main loop with four fractures (a, b, c, d), at least 2 permanent magnets are arranged outside a forming area formed by connecting the four fractures (a, b, c, d) end to end in sequence, the permanent magnets outside the fractures in the same current direction are positioned in the same magnetic pole direction on one side of the fracture surface when the movable contact assembly (1) and the fixed contact assembly (2) are connected, and the permanent magnets outside the fractures in different current directions are positioned in different magnetic pole directions on one side of the fracture surface;
the movable contact assembly (1) and the fixed contact assembly (2) are connected in series to form a Z-shaped main loop.
2. The dc contactor arc extinguishing structure of claim 1, wherein: the outer sides of the four fracture parts (a, b, c and d) are sequentially connected end to form a region, 2 permanent magnets are arranged, the 2 permanent magnets are a first permanent magnet (301) and a second permanent magnet (302), the first permanent magnet (301) and the second permanent magnet (302) are identical in shape, the first permanent magnet (301) is positively magnetized, and the second permanent magnet (302) is reversely magnetized.
3. The dc contactor arc extinguishing structure of claim 2, wherein: the permanent magnet I (301) and the permanent magnet II (302) are square or arc-shaped.
4. The dc contactor arc extinguishing structure of claim 1, wherein: the outer sides of the four fracture parts (a, b, c and d) are sequentially connected end to form a region, 4 permanent magnets are arranged on the outer sides of the region, the 4 permanent magnets comprise two permanent magnets three (303,303 ') and two permanent magnets four (304 and 304'), and the permanent magnets three (303,303 ') and the permanent magnets four (304 and 304') are square or arc-shaped.
5. The dc contactor arc extinguishing structure of claim 4, wherein: the third permanent magnet (303,303 ') is positively charged and the fourth permanent magnet (304, 304') is negatively charged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050036.5A CN109119291B (en) | 2018-09-10 | 2018-09-10 | Arc extinguishing structure of direct current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050036.5A CN109119291B (en) | 2018-09-10 | 2018-09-10 | Arc extinguishing structure of direct current contactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109119291A CN109119291A (en) | 2019-01-01 |
| CN109119291B true CN109119291B (en) | 2024-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811050036.5A Active CN109119291B (en) | 2018-09-10 | 2018-09-10 | Arc extinguishing structure of direct current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109119291B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416031B (en) * | 2019-08-19 | 2024-08-06 | 德力西电气有限公司 | Four-break point contactor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014177A1 (en) * | 1992-12-16 | 1994-06-23 | Nu-Lec Pty. Ltd. | Arc extinguishing switch apparatus and method |
| CN1967753A (en) * | 2006-11-24 | 2007-05-23 | 西安交通大学 | A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker |
| CN203134623U (en) * | 2013-02-06 | 2013-08-14 | 西安沙尔特宝电气有限公司 | Permanent-magnetic arc extinguishing apparatus for contactor main contact |
| CN104124118A (en) * | 2014-08-17 | 2014-10-29 | 中国船舶重工集团公司第七一二研究所 | Magnetic blow-out device of direct current breaker |
| EP2927927A1 (en) * | 2014-04-02 | 2015-10-07 | Schaltbau GmbH | Dc contactor with additional switching for ac loads and polling contrary to the preferred power direction |
| CN208903932U (en) * | 2018-09-10 | 2019-05-24 | 上海良信电器股份有限公司 | A kind of D.C. contactor arc extinguishing structure |
-
2018
- 2018-09-10 CN CN201811050036.5A patent/CN109119291B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014177A1 (en) * | 1992-12-16 | 1994-06-23 | Nu-Lec Pty. Ltd. | Arc extinguishing switch apparatus and method |
| CN1967753A (en) * | 2006-11-24 | 2007-05-23 | 西安交通大学 | A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker |
| CN203134623U (en) * | 2013-02-06 | 2013-08-14 | 西安沙尔特宝电气有限公司 | Permanent-magnetic arc extinguishing apparatus for contactor main contact |
| EP2927927A1 (en) * | 2014-04-02 | 2015-10-07 | Schaltbau GmbH | Dc contactor with additional switching for ac loads and polling contrary to the preferred power direction |
| CN104124118A (en) * | 2014-08-17 | 2014-10-29 | 中国船舶重工集团公司第七一二研究所 | Magnetic blow-out device of direct current breaker |
| CN208903932U (en) * | 2018-09-10 | 2019-05-24 | 上海良信电器股份有限公司 | A kind of D.C. contactor arc extinguishing structure |
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| Publication number | Publication date |
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| CN109119291A (en) | 2019-01-01 |
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