CN111986937A

CN111986937A - Electromagnetic device with permanent magnet

Info

Publication number: CN111986937A
Application number: CN201910422272.3A
Authority: CN
Inventors: 刘斯
Original assignee: Hangzhou Hongfeng Network Technology Co Ltd
Current assignee: Hangzhou Hongfeng Network Technology Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-11-24

Abstract

An electromagnetic device with a permanent magnet comprises a first movable iron core and a second movable iron core which are respectively provided with a T-shaped structure and one end extending into a static iron core device, wherein one ends of the first movable iron core and the second movable iron core extending into the static iron core device are respectively connected with two pole faces of the permanent magnet in an attracting mode; the static iron core device comprises a first shell, a second shell, a first static iron core and a second static iron core, wherein the first static iron core and the second static iron core are arranged in the first shell and are symmetrically arranged on two sides of the movable iron core. The invention provides a novel structure, which skillfully realizes bistable control of an electromagnetic device, and can realize the movement of a movable iron core of an electromagnet by controlling the polarity of an electric signal of a coil.

Description

Electromagnetic device with permanent magnet

Technical Field

The invention relates to an electromagnetic device, in particular to an electromagnetic device with a permanent magnet.

Background

With the continuous development of low-voltage apparatus technology, the number of intelligent low-voltage apparatuses is increasing, and such intelligent apparatus detection mechanisms are generally completed by electronic circuits and signal acquisition elements, while the execution mechanisms are completed by operation mechanisms or operation devices. Thus, a signal transmission connection is required between the detection means and the operating means, which is accomplished by a flux transformer arrangement. The magnetic flux converter receives the electric signal sent by the detection mechanism, and then outputs a mechanical tripping signal to push the operation mechanism to act. Therefore, the magnetic flux converter is an important pivot device in the low-voltage electrical apparatus, and the structure, control mode, technical performance and the like of the magnetic flux converter directly influence the structural design and performance of the switch.

Patent document No. 201503780U discloses a magnetic flux converter with a permanent magnet, including a magnetic yoke, a permanent magnet, a coil frame, a coil, a plunger, a spring, a snap spring, and a cushion pad; the coil is wound on the coil framework; the permanent magnet is arranged in the coil framework; the magnetic yoke is also used as a shell of the magnetic flux converter; the coil framework is also used as a cover of the magnetic flux converter; the ejector rod is adsorbed on the permanent magnet in an attraction state; the magnetic yoke is provided with two symmetrical fixed claws; the coil framework is internally divided into three cavities, the bottom circular cavity is used for placing the permanent magnet, and the middle and upper circular cavities are used for placing the ejector rod, and the diameter of the middle cavity is larger than that of the upper cavity and used for limiting the ejector rod. Although the magnetic flux converter has simple structure and lower cost, the reset of the magnetic flux converter can only be reset by mechanical force and can not be reset by electric signals, so that the application occasion of the magnetic flux converter is limited.

Disclosure of Invention

The invention aims to provide an electromagnetic device with a permanent magnet, which solves the defects of the prior art and provides an electromagnetic device with small volume and capability of controlling an electric signal to realize reciprocating motion.

In order to achieve the above purpose and solve the above technical problems, the technical solution of the present invention is:

An electromagnetic device with a permanent magnet comprises a first movable iron core and a second movable iron core which are respectively provided with a T-shaped structure and one end extending into a static iron core device, wherein one ends of the first movable iron core and the second movable iron core extending into the static iron core device are respectively connected with two pole faces of the permanent magnet in an attracting mode; the static iron core device comprises a first body shell, a second body shell, a first static iron core and a second static iron core, wherein the first static iron core and the second static iron core are arranged inside the first body shell and are symmetrically arranged on two sides of the movable iron core, a first armature, a first coil framework and a first coil are symmetrically arranged on the first armature, the first coil framework and the first coil are wound on the first coil framework to form the first static iron core, and a second armature, a second coil framework and a second coil are symmetrically arranged on the second armature, the second coil framework and the second coil are wound on the second coil framework to form the second static iron core.

The permanent magnet is a cylindrical neodymium iron boron magnet.

And a groove matched with the permanent magnet is arranged at the joint of the first movable iron core and the permanent magnet and the joint of the second movable iron core and the permanent magnet.

The first armature and the second armature are in I-shaped structures.

The depth of the groove is 15% -30% of the thickness of the permanent magnet.

Compared with the prior art, the invention has the following positive effects: the electromagnetic device with the permanent magnet adopts a novel structure, skillfully realizes the bistable control of the electromagnetic device, and can realize the movement of the movable iron core of the electromagnet by controlling the polarity of an electric signal of a coil.

Drawings

Fig. 1 is a perspective view schematically illustrating the present embodiment.

Fig. 2 is a rear perspective view of the hidden body case of the present embodiment.

Fig. 3 is a sectional view of the present embodiment.

Fig. 4 is a sectional view of the present embodiment.

Fig. 5 is a sectional view of the present embodiment.

Fig. 6 is a sectional view of the present embodiment.

Fig. 7 is an exploded view of the present embodiment.

In the figure: 1. the static iron core device comprises a static iron core device, 2, a first movable iron core, 3, a second movable iron core, 4, a permanent magnet, 5, a first body shell, 6, a second body shell, 7, a first static iron core, 8, a second static iron core, 9, a first armature, 10, a first coil framework, 11, a first coil, 12, a second armature, 13, a second coil framework, 14 and a second coil.

Detailed Description

The present invention will be described with reference to the following embodiments and accompanying drawings.

Referring to FIGS. 1-7:

an electromagnetic device with a permanent magnet comprises a first movable iron core 2 and a second movable iron core 3, wherein one ends of the first movable iron core 2 and the second movable iron core 3 respectively extend into a T-shaped structure of a static iron core device 1, and one ends of the first movable iron core 2 and the second movable iron core 3 extending into the static iron core device 1 are respectively connected with two pole faces of a permanent magnet 4 in an attracting mode; the static iron core device 1 comprises a first body shell 5, a second body shell 6, a first static iron core 7 and a second static iron core 8, wherein the first static iron core 7 and the second static iron core 8 are arranged in the first body shell and are symmetrically arranged on two sides of a movable iron core, a first armature 9, a first coil framework 10 which is symmetrically arranged on the first armature 9 and a first coil 11 which is wound on the first coil framework 10 form the first static iron core 7, and a second armature 12, a second coil framework 13 which is symmetrically arranged on the second armature 12 and a second coil 14 which is wound on the second coil framework 13 form the second static iron core 8.

The permanent magnet 4 is a cylindrical neodymium iron boron magnet.

And a groove matched with the permanent magnet 4 is arranged at the joint of the first movable iron core 2, the second movable iron core 3 and the permanent magnet 4.

The first armature 9 and the second armature 12 are in I-shaped structures.

The depth of the groove is 15% -30% of the thickness of the permanent magnet 4.

Referring to fig. 3, the electromagnetic device is in a steady state, and the upper pole face of the movable iron core is attracted with the static iron core.

Referring to fig. 4, by applying an opposite-phase electrical signal to the coil, like poles of the upper pole face of the stationary core and the upper pole face of the movable core repel each other, and like poles of the lower pole face of the stationary core and the lower pole face of the movable core repel each other.

Referring to fig. 5-6, due to the inertia of the upward rapid movement of the movable iron core, the movement stroke of the movable iron core will exceed half of the total stroke, when the movement stroke of the movable iron core exceeds half of the total stroke, the coil is immediately energized with a forward electric signal, at this time, the upper and lower pole faces of the movable and stationary iron cores are attracted by opposite polarities, but because the air gap of the lower pole face of the movable and stationary iron cores is smaller than the air gap of the upper pole face, the attraction force generated by the opposite polarities of the lower pole face is larger than the attraction force generated by the upper pole face, the movable iron core will continue to move upward until the lower pole faces of the movable and stationary iron cores are completely attracted, so that the electromagnetic device is in another stable device, and if the electromagnetic device needs to move in the reverse direction, the operation is only needed according.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all the minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic device with a permanent magnet is characterized in that: the permanent magnet synchronous motor comprises a first movable iron core (2) and a second movable iron core (3) which are of T-shaped structures and one ends of which extend into a static iron core device (1), wherein one ends of the first movable iron core (2) and one end of the second movable iron core (3) which extend into the static iron core device (1) are respectively connected with two pole faces of a permanent magnet (4) in an attracting mode; the static iron core device (1) comprises a first body shell (5), a second body shell (6), a first static iron core (7) and a second static iron core (8), wherein the first static iron core (7) and the second static iron core (8) are arranged inside the first body shell and are symmetrically arranged on two sides of the movable iron core, a first armature (9), a first coil framework (10) which is symmetrically arranged on the first armature (9) and a first coil (11) which is wound on the first coil framework (10) form the first static iron core (7), and a second armature (12), a second coil framework (13) which is symmetrically arranged on the second armature (12) and a second coil (14) which is wound on the second coil framework (13) form the second static iron core (8).

2. An electromagnetic device with a permanent magnet according to claim 1, characterized in that: the permanent magnet (4) is a cylindrical neodymium iron boron magnet.

3. An electromagnetic device with a permanent magnet according to claim 1, characterized in that: and a groove matched with the permanent magnet (4) is arranged at the joint of the first movable iron core (2) and the permanent magnet (4) and the second movable iron core (3).

4. An electromagnetic device with a permanent magnet according to claim 1, characterized in that: the first armature (9) and the second armature (12) are in I-shaped structures.

5. An electromagnetic device with a permanent magnet according to claim 3, characterized in that: the depth of the groove is 15% -30% of the thickness of the permanent magnet (4).