Arc path-forming part and direct current relay comprising same

Patent metadata

Field	Value
Publication number	US-12230464-B2
Application number	US-202118013487-A
Country	US
Kind code	B2
Filing date	Jun 21, 2021
Priority date	Jun 29, 2020
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An arc path-forming part and a DC relay comprising same are disclosed. The arc path-forming part according to various embodiments of the present disclosure comprises a Halbach array and a magnet part that form a magnetic field in a space formed therein. The magnetic field formed by the Halbach array is stronger in the direction toward the space. The magnetic field formed by the Halbach array and the magnet part forms an electromagnetic force together with the current applied to each fixed contactor. Here, the electromagnetic force formed in the vicinity of each fixed contactor is formed in a direction away from the center of the space or in a direction away from each fixed contactor. Accordingly, a generated arc can be quickly extinguished and discharged by being induced by the electromagnetic force.

First claim

The invention claimed is:

1. An arc path-forming part comprising:
a magnet frame having a space part, in which a fixed contactor and a movable contactor are accommodated, formed therein;
a Halbach array located in the space part of the magnet frame and configured to form a magnetic field in the space part,
wherein a length of the space part in one direction is formed to be greater than a length thereof in the other direction,
the magnet frame includes:
a first surface and a second surface which extend in the one direction, are disposed to face each other, and are configured to surround a portion of the space part; and
a third surface and a fourth surface which extend in the other direction, are continuous with the first surface and the second surface, respectively, are disposed to face each other, and are configured to surround a remaining portion of the space part, and
the Halbach array includes a plurality of blocks disposed side by side in the other direction and in contact with at least one other block of the plurality of blocks and formed of a magnetic material, and is disposed adjacent to one or more surfaces of the third surface and the fourth surface.

2. The arc path-forming part of claim 1 , wherein
the Halbach array includes:
a first Halbach array located adjacent to any one surface of the third surface and the fourth surface; and
a second Halbach array located adjacent to the other surface of the third surface and the fourth surface,
wherein the first and second Halbach arrays are disposed to face each other with the space part therebetween.

3. The arc path-forming part of claim 2 , wherein
the first Halbach array includes:
a first block located to be biased to any one surface of the first surface and the second surface;
a third block located to be biased to the other surface of the first surface and the second surface; and
a second block located between the first block and the third block,
the second Halbach array includes:
a first block located to be biased to the any one surface of the first surface and the second surface;
a third block located to be biased to the other surface of the first surface and the second surface; and
a second block located between the first block and the third block, and
the first to third blocks of the first Halbach array face the first to third blocks of the second Halbach array, respectively, with the space part therebetween.

4. The arc path-forming part of claim 3 , wherein
in the first Halbach array,
a surface of the first block facing the second block, a surface of the third block facing the second block, and a surface of the second block facing the second Halbach array are magnetized to the same polarity, and
in the second Halbach array,
a surface of the first block facing the second block, a surface of the third block facing the second block, and a surface of the second block facing the first Halbach array are magnetized to a polarity different from the polarity.

5. The arc path-forming part of claim 3 , wherein
in the first Halbach array,
a surface of the first block facing the second block, a surface of the third block facing the second block, and a surface of the second block facing the second Halbach array are magnetized to the same polarity, and
in the second Halbach array,
a surface of the first block facing the second block, a surface of the third block facing the second block, and a surface of the second block facing the first Halbach array are magnetized to a polarity the same as the polarity.

6. The arc path-forming part of claim 1 , wherein
the Halbach array is located adjacent to any one surface of the third surface and the fourth surface,
a magnet part configured to form a magnetic field in the space part is provided separately from the Halbach array to be adjacent to the other surface of the third surface and the fourth surface, and
the Halbach array and the magnet part are disposed to face each other with the space part therebetween.

7. The arc path-forming part of claim 6 , wherein
the Halbach array includes:
a first block located to be biased to any one surface of the first surface and the second surface;
a third block located to be biased to the other surface of the first surface and the second surface; and
a second block located between the first block and the third block, and
the magnet part includes:
a facing surface facing the Halbach array; and
an opposing surface opposite to the Halbach array.

8. The arc path-forming part of claim 7 , wherein
in the Halbach array,
a surface of the first block facing the second block, a surface of the third block facing the second block, and a surface of the second block facing the magnet part are magnetized to the same polarity, and
in the magnet part,
the facing surface is magnetized to a polarity different from the polarity.

9. The arc path-forming part of claim 7 , wherein
in the Halbach array,
a surface of the first block facing the second block, a surface of the third block facing the second block, and a surface of the second block facing the magnet part are magnetized to the same polarity, and
in the magnet part,
the facing surface is magnetized to a polarity the same as the polarity.

10. The arc path-forming part of claim 1 , wherein
the Halbach array includes:
a first Halbach array located adjacent to any one surface of the third surface and the fourth surface, and located to be biased to any one surface of the first surface and the second surface; and
a second Halbach array located adjacent to the other surface of the third surface and the fourth surface, and located to be biased to the other surface of the first surface and the second surface,
wherein the first and second Halbach arrays are disposed to face each other with the space part therebetween.

11. The arc path-forming part of claim 10 , wherein
the first Halbach array includes:
a first block located to overlap the second Halbach array in the other direction; and
a second block located between the first block and the any one surface of the first surface and the second surface,
the second Halbach array includes:
a first block located to overlap the first Halbach array in the other direction; and
a second block located between the first block and the other surface of the first surface and the second surface, and
the first block of the first Halbach array and the first block of the second Halbach array face each other.

12. The arc path-forming part of claim 11 , wherein
in the first Halbach array,
a surface of the first block facing the second Halbach array and a surface of the second block facing the first block are magnetized to the same polarity, and
in the second Halbach array,
a surface of the first block facing the first Halbach array and a surface of the second block facing the first block are magnetized to a polarity different from the polarity.

13. The arc path-forming part of claim 11 , wherein
in the first Halbach array,
a surface of the first block facing the second Halbach array and a surface of the second block facing the first block are magnetized to the same polarity, and
in the second Halbach array,
a surface of the first block facing the first Halbach array and a surface of the second block facing the first block are magnetized to a polarity the same as the polarity.

14. The arc path-forming part of claim 1 , wherein
the Halbach array is located adjacent to any one surface of the third surface and the fourth surface, and is located to be biased to any one surface of the first surface and the second surface,
a magnet part configured to for

Assignees

• Ls Electric Co Ltd

Inventors

• Yoo Jung Woo
• Kim Han Mi Ru
• Lee Young Ho

Classifications

• H01H50/54

  Contact arrangements · CPC title

• H01H50/38 Primary

  Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay · CPC title

• H01H50/546

  for contactors having bridging contacts · CPC title

• H01H9/443 Primary

  using permanent magnets · CPC title