CN216145561U

CN216145561U - Magnetic circuit structure of contactor

Info

Publication number: CN216145561U
Application number: CN202121485562.1U
Authority: CN
Inventors: 龚祚勇; 林浩; 刘韬略; 李强; 彭琼
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-03-29
Anticipated expiration: 2031-06-30

Abstract

A magnetic circuit structure of a contactor is characterized in that: it includes yoke group, permanent magnet group and moves the iron core, move the both ends of iron core with permanent magnet group is corresponding, still includes coil pack, move the iron core and lay in coil pack's cavity, the one end of yoke group with permanent magnet group fixed connection, the other end with move iron core laminating formula contact and connect. The utility model integrates a plurality of contactors into a whole by improving the magnetic circuit structure of the contactor, realizes the control of a single contactor on a plurality of states, and realizes the switching of the functions of the contactor through the change of current.

Description

Magnetic circuit structure of contactor

Technical Field

The utility model belongs to the technical field of contactors, and particularly relates to a magnetic circuit structure of a contactor.

Background

Direct current contactor universal use fills fields such as electric pile in new energy automobile, and the electric current range is 50 ~ 300A or higher, and the electric current then is between 500 ~ 900V. With the rapid development of the industry, the rated voltage of the direct current contactor is required to be higher and higher in the market. Because the volume of the direct current contactor is determined by rated current and the contact is in a closed space, the most important factor influencing the service life of the direct current contactor is the switching-on voltage, the higher the voltage is, the higher the energy of the electric arc is, the more serious the ablation on the contact is, and the service life of the contactor is directly influenced. In the market, in order to perform multi-state control on products by using direct current contactors, two or more contactors are generally used in a superposition and matching manner, but the mode of using two or more contactors in a superposition and matching manner has high cost and large volume, and is difficult to popularize and use in a large area; and adopt combination contactor to realize the multi-state control of product, because the traditional structure that combination contactor still adopted, can't effectively reduce the volume, combination contactor mostly is ceramic direct current contactor simultaneously, and ceramic direct current contactor production technology is complicated, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of large volume and high cost in the prior art that two or more contactors are superposed and combined, and provides a magnetic circuit structure of a contactor.

Technical scheme

In order to achieve the above technical object, the present invention provides a magnetic circuit structure of a contactor, comprising: it includes yoke group, permanent magnet group and moves the iron core, move the both ends of iron core with permanent magnet group is corresponding, still includes coil pack, move the iron core and lay in coil pack's cavity, the one end of yoke group with permanent magnet group fixed connection, the other end with move iron core laminating formula contact and connect.

Further, the number of the coil assemblies is at least one, and the number of the movable iron cores is at least one.

Further, the magnetic yoke assembly comprises a first magnetic yoke and a second magnetic yoke, the permanent magnet assembly comprises a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are fixedly connected with one ends of the first magnetic yoke and the second magnetic yoke correspondingly.

Further, the first permanent magnet and the second permanent magnet have opposite magnetic pole directions.

Furthermore, the first magnetic yoke and the second magnetic yoke are of U-shaped opening structures, the openings of the first magnetic yoke and the second magnetic yoke are arranged in a staggered and opposite mode, the first permanent magnet and the second permanent magnet are fixedly installed at one side end of the corresponding first magnetic yoke and one side end of the corresponding second magnetic yoke and correspond to the two ends of the movable iron core, and magnetic fields generated by the first permanent magnet and the second permanent magnet can correspond to magnetic fields generated after the coil assembly is electrified.

Advantageous effects

According to the magnetic circuit structure of the contactor, the magnetic circuit structure of the contactor is improved, a plurality of contactors are combined into a whole, control of a single contactor on a plurality of states is achieved, and switching of functions of the contactor is achieved through current change.

Drawings

FIG. 1 is a structural view of a magnetic circuit of a contactor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the system state and magnetic circuit when the coil is not energized in accordance with embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the system state and magnetic circuit when the coil is applied with a forward pulse in the embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of the system state and magnetic circuit when the positive pulse disappears in the coil according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of the system state and magnetic circuit when reverse pulse is applied to the coil according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of the system state and magnetic circuit when the reverse pulse disappears in the coil according to the embodiment of the present invention;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Examples

As shown in the attached figure 1, the magnetic circuit structure of the contactor comprises a magnetic yoke group 1, a permanent magnet group 2 and a movable iron core 3, wherein two ends of the movable iron core 2 correspond to the permanent magnet group 1, the magnetic circuit structure further comprises a coil group 4, the movable iron core 3 is arranged in a cavity of the coil group 4, one end of the magnetic yoke group 1 is fixedly connected with the permanent magnet group 2, and the other end of the magnetic yoke group is in contact connection with the movable iron core 3 in a laminating manner.

Specifically, the number of the coil assemblies 4 is at least one, the number of the movable iron cores 3 is at least one, and a plurality of coil assemblies 4 may share one movable iron core 3. The magnetic yoke group 1 comprises a first magnetic yoke 1a and a second magnetic yoke 1b, the permanent magnet group 2 comprises a first permanent magnet 2a and a second permanent magnet 2b, and the first permanent magnet 2a and the second permanent magnet 2b are fixedly connected with one ends of the first magnetic yoke 1a and the second magnetic yoke 1b correspondingly. The magnetic pole directions of the first permanent magnet 2a and the second permanent magnet 2b are opposite.

More specifically, the first magnetic yoke 1a and the second magnetic yoke 1b are U-shaped openings, the first magnetic yoke 1a and the second magnetic yoke 1b are provided with openings which are staggered and opposite to each other, the first permanent magnet 2a and the second permanent magnet 2b are fixedly installed at one side end of the corresponding first magnetic yoke 1a and the corresponding second magnetic yoke 1b and correspond to two ends of the movable iron core 3, and a magnetic field generated by the first permanent magnet 2a and the second permanent magnet 2b can correspond to a magnetic field generated by the coil assembly 4 after being electrified.

The working principle of the embodiment is that when the coil assembly 4 is not electrified, as shown in fig. 2, a magnetic flux phi 1 and a magnetic flux phi 2 are generated by a first permanent magnet 2a and a second permanent magnet 2b in the contactor, and the movable iron core 3 and the first permanent magnet 2a and the second permanent magnet 2b are kept in a separated state and are not contacted with each other;

after the coil assembly 4 is subjected to positive pulse, as shown in figure 3, a magnetic flux phi 3 with the same direction as the magnetic flux phi 1 and a magnetic flux phi 4 with the opposite direction to the magnetic flux phi 1 are generated, under the common action of the magnetic flux phi 1 and the magnetic flux phi 3 in the same direction, the movable iron core 3 is attracted towards the permanent magnet I2 a to move, and the movable iron core keeps contact with the magnetic yoke assembly 1 in the moving process; the magnetic flux phi 2 and the magnetic flux phi 4 interact reversely, and the movement of the movable iron core 3 is not influenced;

when the positive pulse in the coil assembly 4 disappears, as shown in fig. 4, the magnetic flux phi 3 and the magnetic flux phi 4 disappear, the movable iron core 3 cannot keep the attraction state continuously, and the movable iron core 3 resets;

after the coil assembly 4 is electrified with the reverse pulse, as shown in figure 5, a magnetic flux phi 5 with the same direction as the magnetic flux phi 2 and a magnetic flux phi 6 with the opposite direction to the magnetic flux phi 1 are generated, under the combined action of the magnetic flux phi 2 and the magnetic flux phi 5 in the same direction, the movable iron core 3 is attracted towards the permanent magnet 2b to move, and the movable iron core keeps contact with the magnetic yoke group 1 in the moving process; the magnetic flux phi 1 and the magnetic flux phi 6 interact reversely, and the movement of the movable iron core 3 is not influenced;

when the reverse pulse passing through the coil assembly 1 disappears, as shown in fig. 6, the magnetic flux phi 5 and the magnetic flux phi 6 disappear, the movable iron core 3 cannot keep the attraction state continuously, and the movable iron core 3 resets.

According to the magnetic circuit structure of the contactor, provided by the embodiment of the utility model, the plurality of contactors are integrated by improving the magnetic circuit structure of the contactor, so that the control of a single contactor on a plurality of states is realized, and the function switching of the contactor is realized through the change of current.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic circuit structure of a contactor is characterized in that: it includes yoke group, permanent magnet group and moves the iron core, move the both ends of iron core with permanent magnet group is corresponding, still includes coil pack, move the iron core and lay in coil pack's cavity, the one end of yoke group with permanent magnet group fixed connection, the other end with move iron core laminating formula contact and connect.

2. A magnetic circuit structure of a contactor as claimed in claim 1, wherein: the number of the coil assemblies is at least one, and the number of the movable iron cores is at least 1.

3. A magnetic circuit structure of a contactor as claimed in claim 1, wherein: the magnetic yoke assembly comprises a first magnetic yoke and a second magnetic yoke, the permanent magnet assembly comprises a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are fixedly connected with one ends of the first magnetic yoke and the second magnetic yoke correspondingly.

4. A magnetic circuit structure of a contactor as claimed in claim 3, wherein: the magnetic pole directions of the first permanent magnet and the second permanent magnet are opposite.

5. A magnetic circuit structure of a contactor as claimed in claim 3, wherein: the first magnetic yoke and the second magnetic yoke are of U-shaped opening structures, the openings of the first magnetic yoke and the second magnetic yoke are arranged in a staggered and opposite mode, the first permanent magnet and the second permanent magnet are fixedly installed at one side end of the corresponding first magnetic yoke and one side end of the corresponding second magnetic yoke and correspond to the two ends of the movable iron core, and magnetic fields generated by the first permanent magnet and the second permanent magnet can correspond to magnetic fields generated after the coil assembly is electrified.