CN112908772A - Miniature high-voltage vacuum AC contactor - Google Patents
Miniature high-voltage vacuum AC contactor Download PDFInfo
- Publication number
- CN112908772A CN112908772A CN202110319937.5A CN202110319937A CN112908772A CN 112908772 A CN112908772 A CN 112908772A CN 202110319937 A CN202110319937 A CN 202110319937A CN 112908772 A CN112908772 A CN 112908772A
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- CN
- China
- Prior art keywords
- contactor
- switch tube
- vacuum
- vacuum switch
- miniature high
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a miniature high-voltage vacuum AC contactor, which comprises: the electromagnetic driving device comprises a glue layer, a vacuum switch tube, a dynamic and static conductive plate, an armature, an electromagnetic driving mechanism and a silica gel insulating layer; the dynamic and static conductive plates can be fixed on the PCB in a soldering lug mode to realize loop connection; the vacuum switch tube adopts a sheet type corrugated tube to provide necessary self-closing force and simultaneously reduce the volume of the vacuum switch tube; the insulating layer of the silica gel plays a combined role of supporting and insulating between the armature and the electromagnetic driving mechanism; the inside of the miniature high-voltage vacuum alternating current contactor is subjected to glue filling and sealing treatment to form a glue layer, so that the insulating capability is enhanced; the electromagnetic driving mechanism can automatically complete the switching on and off of the miniature high-voltage vacuum alternating-current contactor when power is lost. The miniature high-voltage vacuum alternating current contactor disclosed by the invention can achieve high insulation grade capability under an ultra-small volume, is low in power consumption and simple in connection, can realize load brake separation under a high-voltage and high-current working condition, and has strong on-off capability and impact load resistance capability.
Description
Technical Field
The invention belongs to the technical field of power electronics and electronic communication, particularly relates to a contactor, and particularly relates to a miniature high-voltage vacuum alternating current contactor.
Background
In the field of power electronics, a vacuum alternating current contactor serving as a load switch can realize connection and disconnection of a large current and a high voltage. However, the existing vacuum alternating current contactor has the problems of overlarge volume, single connection mode, larger driving power, higher energy consumption and the like.
In the field of electronic communication, a common relay for on-off can meet application requirements under a specific working condition of low current and low voltage. However, under the working conditions of large current and high voltage, the existing relay can not realize on-load brake-off, has weak on-off capacity and poor impact load bearing capacity.
In summary, under the working condition of large current and high voltage, how to realize the loop switch has the characteristics of small volume, low energy consumption, strong on-off capability, good impact load bearing capability, various connection modes and the like, and is a problem to be solved urgently by technical staff in the related field at present.
Disclosure of Invention
In order to overcome the defects, the invention provides the miniature high-voltage vacuum alternating current contactor which has the characteristics of small volume, low energy consumption, good on-off capacity, impact load bearing capacity, various connection modes and the like.
The technical scheme adopted by the invention for solving the technical problem is as follows: a miniature high-voltage vacuum alternating current contactor comprises a contactor shell, a vacuum switch tube assembly and an electromagnetic driving mechanism, wherein the vacuum switch tube assembly and the electromagnetic driving mechanism are arranged in the contactor shell, the electromagnetic driving mechanism can control the opening and closing state of the vacuum switch tube assembly, the vacuum switch tube assembly and the electromagnetic driving mechanism are arranged in the contactor shell in parallel, an insulating layer is arranged between the electromagnetic driving mechanism and the contactor shell and between one side surface of the electromagnetic driving mechanism, which is close to the vacuum switch tube assembly,
as a further improvement of the present invention, the insulating layer is a silica gel insulating layer.
As a further improvement of the invention, the vacuum switch tube assembly comprises a vacuum switch tube, a static conductive plate and a dynamic conductive plate which are arranged at two ends of the vacuum switch tube, and an armature which is fixedly connected with the dynamic conductive plate.
As a further improvement of the present invention, the electromagnetic driving mechanism includes a permanent magnet, a coil and a magnetic yoke, the magnetic yoke is a cylindrical magnetic yoke having an opening on one side surface close to the vacuum switch tube assembly, and the coil is sleeved on the periphery of the permanent magnet and placed in the magnetic yoke.
As a further improvement of the present invention, when the electromagnetic driving mechanism is in a power-off state, the electromagnetic attraction of the permanent magnet to the armature separates the moving contact and the fixed contact of the vacuum switch tube assembly, so that the contactor is in a switching-off state; when the electromagnetic driving mechanism is in an electrified state, the coil enables the magnetic field of the permanent magnet on the armature to generate a demagnetization effect, the electromagnetic attraction of the permanent magnet to the armature is smaller than the self-closing force of the vacuum switch tube assembly, and then the moving contact and the static contact of the vacuum switch tube assembly are closed, so that the contactor is in a closing state.
As a further improvement of the invention, a glue layer is formed at the gap between the contactor shell and the vacuum switch tube through glue filling and sealing treatment, and an isolation cover is arranged between the vacuum switch tube and the insulating layer.
As a further improvement of the invention, the diaphragm type corrugated pipe with a transverse wave pattern shape is arranged in the vacuum switch pipe.
As a further improvement of the invention, the thickness of the insulating layer is 0.8-1.2 mm.
As a further improvement of the invention, the tail ends of the dynamic conducting plate and the static conducting plate respectively extend out of the contactor shell and are fixed on the PCB board in a soldering lug mode.
As a further improvement of the invention, the contactor shell is made of PVC material.
The invention has the beneficial effects that:
(1) according to the invention, the diaphragm type corrugated pipe can reduce the length of the vacuum switch tube on the premise of small opening distance, and can provide necessary self-closing force for the vacuum switch tube contact. The switching-on maintaining force of the miniature high-voltage vacuum alternating current contactor comes from the self-closing force of the vacuum switching tube, an additional force application structure is not needed, and the structure is simple.
(2) In the invention, the opening maintaining force of the miniature high-voltage vacuum alternating current contactor comes from the permanent magnetic attraction of the electromagnetic driving mechanism to the armature, and the silica gel insulating layer is arranged between the armature and the electromagnetic driving mechanism to provide a certain air gap distance and simultaneously insulate a main loop and a secondary loop.
(3) In the invention, the miniature high-voltage vacuum alternating current contactor is closed by adopting a demagnetization mode, and because a certain air gap distance exists between the armature and the electromagnetic driving mechanism, the electromagnetic attraction between the armature and the electromagnetic driving mechanism is not too large, and the electromagnetic driving mechanism can complete the closing of the miniature high-voltage vacuum alternating current contactor under very small driving power.
(4) According to the invention, the vacuum switch tube, the silica gel insulating layer and the shell are subjected to glue filling and sealing treatment, so that the overall strength of the miniature high-voltage vacuum alternating current contactor is enhanced, and the deformation of an inner frame caused by external stress is avoided. And simultaneously plays a role in enhancing insulation.
(5) In the invention, the volume of the miniature high-voltage vacuum alternating current contactor is similar to that of a relay used in general electronic communication, the technical problem that the existing relay cannot complete on-load brake opening under the working condition of large current and high voltage is solved, and meanwhile, the miniature high-voltage vacuum alternating current contactor has strong on-off capacity and impact load resistance capacity. The tail ends of the dynamic and static conducting plates are fixed on the PCB in a soldering lug mode, and the miniature high-voltage vacuum alternating current contactor achieves the effect of a loop switch.
(6) According to the invention, the electromagnetic driving mechanism is powered on and powered off to automatically complete the switching on and off of the miniature high-voltage vacuum alternating-current contactor, no extra measures are needed, the structure is simple, and the function is complete.
Drawings
FIG. 1 is a schematic view of a miniature high voltage vacuum AC contactor according to the present invention;
FIG. 2 is a schematic view of a vacuum switch tube assembly in the miniature high voltage AC vacuum contactor according to the present invention;
fig. 3 is a sectional view of an electromagnetic driving mechanism in the micro-sized high-voltage vacuum ac contactor according to the present invention.
The reference symbols shown in the figures are: 1-glue layer, 2-vacuum switch tube component, 21-static conductive plate, 22-vacuum switch tube, 221-isolation cover, 222-diaphragm type corrugated tube, 23-armature, 24-dynamic conductive plate, 3-contactor shell, 4-insulating layer, 5-electromagnetic driving mechanism, 51-permanent magnet, 52-coil and 53-magnetic yoke.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings for further understanding.
Referring to fig. 1-3, a miniature high voltage vacuum ac contactor according to the present invention is shown. The miniature high-voltage vacuum alternating current contactor mainly comprises a contactor shell 3, a vacuum switch tube assembly 2, an electromagnetic driving mechanism 5, a glue layer 1 and an insulating layer 4. The vacuum switch tube assembly 2 and the electromagnetic driving mechanism 5 are arranged in parallel in the contactor shell 3, the contactor shell 3 is made of PVC materials, and the insulating layer is a silica gel insulating layer.
In this embodiment, the vacuum switch tube assembly 2 includes a vacuum switch tube 22, and a static conductive plate 21 and a dynamic conductive plate 23 disposed at two ends of the vacuum switch tube, and an armature 24 fixedly connected to the dynamic conductive plate. The movable and static conductive plates are linked with the movable and static contacts in the vacuum switch tube 22, respectively, that is, when the movable conductive plate is far away from or close to the static conductive plate, the movable and static contacts are driven to be separated and closed.
In this embodiment, the electromagnetic driving mechanism 5 includes a permanent magnet 51, a coil 52 and a magnetic yoke 53, the permanent magnet 51, the coil 52 and the magnetic yoke 53 are all revolving bodies, the permanent magnet 51 is located at the center of the electromagnetic driving mechanism, the coil 52 is sleeved on the periphery of the permanent magnet 51 and is placed in the magnetic yoke 53, and the magnetic yoke 53 is a cylindrical structure with an opening on one side close to the vacuum switch tube assembly 2. Wherein the yoke 53 is made of electrical pure iron. The whole electromagnetic driving mechanism 5 has simple and compact structure, small volume and easy assembly.
In this embodiment, the electromagnetic driving mechanism 5 and the vacuum switch tube assembly 2 are arranged in parallel, that is, the electromagnetic driving mechanism 5 is arranged outside the armature of the vacuum switch tube assembly 2, when the electromagnetic driving mechanism 5 is in a power-off state, the electromagnetic attraction of the permanent magnet 51 to the armature 24 drives the movable conductive plate and the movable contact to move to the opening position, and the movable contact and the fixed contact of the vacuum switch tube 2 are separated, so as to complete the opening operation of the vacuum switch tube, that is, the movable contact and the fixed contact of the vacuum switch tube assembly 2 are separated, so that the contactor is in the opening state. When the electromagnetic driving mechanism 5 is in an energized state, the coil 52 demagnetizes the magnetic field of the permanent magnet 51 on the armature 24, so that the electromagnetic attraction of the permanent magnet 51 on the armature 24 is smaller than the self-closing force of the vacuum switch tube assembly 2, and the armature 24, the movable conductive plate 23 and the movable contact move to the closing position in the forward direction, so that the movable contact and the fixed contact of the vacuum switch tube assembly 2 are closed, and the contactor is in the closing state.
In this embodiment, the vacuum switch tube 22 is a diaphragm type bellows 222 with a built-in transverse wave pattern, which can greatly reduce the length of the vacuum switch tube compared with the conventional bellows.
In this embodiment, the electromagnetic driving mechanism 5 and the armature 23 are covered by a silica gel insulating layer, and a silica gel insulating layer with a thickness of about 1mm is present between the electromagnetic driving mechanism 5 and the armature 23 to separate the electromagnetic driving mechanism 5 and the armature 23, so that an air gap distance is present between the electromagnetic driving mechanism 5 and the armature 23, and the electromagnetic attraction of the permanent magnet 51 to the armature 23 is reduced, so that the magnetic field intensity on the armature 23 is small, and the magnetic field on the armature 23 can be cancelled by a small current flowing through the coil 52. Meanwhile, the silica gel insulating layer 4 plays a combined role of supporting and insulating between the armature and the electromagnetic driving mechanism.
In this embodiment, the gap between the PVC contactor housing 3 and the vacuum switch tube 22 and the silica gel insulating layer is subjected to glue filling and sealing treatment to form a glue layer 1, and an isolation cover 221 is present between the vacuum switch tube 22 and the insulating layer 4, so that glue is prevented from entering.
In this embodiment, the vacuum switch tube 22 is used to perform vacuum insulation between the contact and the outside; insulating the main loop and the secondary loop by a silica gel insulating layer 4; and a glue layer 1 formed by glue pouring and sealing treatment plays a role in enhancing insulation.
In summary, the miniature high-voltage vacuum ac contactor provided by this embodiment is fixed on the PCB by soldering lug welding, and the application scenario is flexible, and can realize effective on-load switching-off only with small driving power under the condition of extremely small volume and under the working condition of large current and high voltage, and has better on-off capability and stronger impact load resistance capability.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a miniature high pressure vacuum ac contactor, includes contactor shell (3) and locates vacuum switch tube subassembly (2) and electromagnetic drive mechanism (5) in it, electromagnetic drive mechanism (5) can control the on-off state of vacuum switch tube subassembly (2), its characterized in that: the vacuum switch tube assembly (2) and the electromagnetic driving mechanism (5) are arranged in the contactor shell (3) in parallel, and insulating layers (4) are arranged between the electromagnetic driving mechanism (5) and the contactor shell (3) and between one side face close to the vacuum switch tube assembly (2).
2. The miniature high voltage vacuum ac contactor of claim 1, wherein: the insulating layer is a silica gel insulating layer.
3. The miniature high voltage vacuum ac contactor according to claim 1 or 2, wherein: the vacuum switch tube assembly (2) comprises a vacuum switch tube (22), a static conductive plate (21) and a dynamic conductive plate (23) which are arranged at two ends of the vacuum switch tube, and an armature (24) fixedly connected with the dynamic conductive plate.
4. The miniature high voltage vacuum ac contactor of claim 3, wherein: the electromagnetic driving mechanism (5) comprises a permanent magnet (51), a coil (52) and a magnetic yoke (53), the magnetic yoke (53) is a cylindrical magnetic yoke (53) with an opening on one side surface close to the vacuum switch tube assembly (2), and the coil (52) is sleeved on the periphery of the permanent magnet (51) and is arranged in the magnetic yoke (53).
5. The miniature high voltage vacuum ac contactor of claim 4, wherein: when the electromagnetic driving mechanism (5) is in a power-off state, the electromagnetic attraction of the permanent magnet (51) to the armature (24) enables the moving contact and the static contact of the vacuum switch tube assembly (2) to be separated, so that the contactor is in a brake-off state; when the electromagnetic driving mechanism (5) is in an electrified state, the coil (52) enables the permanent magnet (51) to generate a demagnetization effect in a magnetic field on the armature (24), so that the electromagnetic attraction of the permanent magnet (51) to the armature (24) is smaller than the self-closing force of the vacuum switch tube assembly (2), and further the moving contact and the fixed contact of the vacuum switch tube assembly (2) are closed to enable the contactor to be in a closed state.
6. The miniature high voltage vacuum ac contactor of claim 3, wherein: the contactor shell (3) and the gap between the vacuum switch tubes (22) are sealed by glue filling to form a glue layer (1), and an isolation cover (221) is arranged between the vacuum switch tubes (22) and the insulating layer.
7. The miniature high voltage vacuum ac contactor of claim 3, wherein: the vacuum switch tube is internally provided with a diaphragm type corrugated tube (222) in a transverse wave pattern shape.
8. The miniature high voltage vacuum ac contactor of claim 3, wherein: the thickness of the insulating layer is 0.8-1.2 mm.
9. The miniature high voltage vacuum ac contactor of claim 3, wherein: the tail ends of the movable conducting plate and the static conducting plate respectively extend out of the contactor shell (3) and are fixed on the PCB in a soldering lug mode.
10. The miniature high voltage vacuum ac contactor of claim 3, wherein: the contactor shell (3) is made of PVC materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319937.5A CN112908772A (en) | 2021-03-25 | 2021-03-25 | Miniature high-voltage vacuum AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319937.5A CN112908772A (en) | 2021-03-25 | 2021-03-25 | Miniature high-voltage vacuum AC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112908772A true CN112908772A (en) | 2021-06-04 |
Family
ID=76106432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110319937.5A Pending CN112908772A (en) | 2021-03-25 | 2021-03-25 | Miniature high-voltage vacuum AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112908772A (en) |
-
2021
- 2021-03-25 CN CN202110319937.5A patent/CN112908772A/en active Pending
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