Arc path generation unit and direct current relay including same

Patent metadata

Field	Value
Publication number	US-12046434-B2
Application number	US-202118013483-A
Country	US
Kind code	B2
Filing date	Jun 21, 2021
Priority date	Jun 29, 2020
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

Disclosed are an arc path generation unit and a direct current relay including the same. An arc path generation unit according to various exemplary embodiments of the present disclosure comprises a Halbach array or a magnet part which forms a magnetic field in a space part for accommodating fixed contacts. The formed magnetic field forms an electromagnetic force, together with the current flowing a direct current relay. The formed electromagnetic force may induce generated arcs. The electromagnetic force formed near each fixed contact is formed in a direction going away from each fixed contact. Therefore, the generated arcs do not meet each other, and thus can be effectively suppressed and discharged.

First claim

The invention claimed is:

1. An arc path generation unit, comprising:
a magnetic frame having a space part in which a plurality of fixed contacts and a movable contact are accommodated; and
a Halbach array which is positioned in the space part of the magnetic frame to form a magnetic field in the space part, and a magnet part which is provided separately from the Halbach array,
wherein the space part has a length in one direction formed to be longer than a length in the other direction,
wherein the magnetic frame comprises:
a first surface and a second surface which extend in the one direction and are disposed to face each other to enclose 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, and are disposed to face each other to enclose the remaining portion of the space part,
wherein the Halbach array comprises a plurality of blocks which are arranged side by side in the one direction and formed of a magnetic material, and is provided in plurality, and a plurality of Halbach arrays are positioned adjacent to any one or more surfaces of the first surface and the second surface, and
wherein the magnet part extends in the other direction and is provided in plurality, and a plurality of magnet parts are disposed adjacent to any one or more surfaces of the third surface and the fourth surface.

2. The arc path generation unit of claim 1 , wherein each surface on which the plurality of Halbach arrays face each other is magnetized with the same polarity, and
wherein each surface on which the plurality of magnet parts face each other is magnetized with a polarity different from the polarity.

3. The arc path generation unit of claim 1 , wherein the Halbach array comprises:
a first Halbach array which is positioned adjacent to any one surface of the first surface and the second surface; and
a second Halbach array which is positioned adjacent to the other one surface of the first surface and the second surface, and
wherein the magnet part comprises:
a first magnet part which is positioned adjacent to any one surface of the third surface and the fourth surface; and
a second magnet part which is positioned adjacent to the other one surface of the third surface and the fourth surface.

4. The arc path generation unit of claim 3 , wherein the first Halbach array and the second Halbach array respectively comprise:
a first block which is positioned to be biased toward the any one surface of the third surface and the fourth surface;
a third block which is positioned to be biased toward the other one surface of the third surface and the fourth surface; and
a second block which is positioned between the first block and the third block.

5. The arc path generation unit of claim 4 , wherein each surface on which the second block of the first Halbach array and the second block of the second Halbach array face each other is magnetized with the same polarity, and
wherein each surface on which the first magnet part and the second magnet part face each other is magnetized with a polarity different from the polarity.

6. The arc path generation unit of claim 3 , wherein the Halbach array comprises:
a first block which is positioned to be biased toward any one surface of the third surface and the fourth surface;
a fifth block which is positioned to be biased toward the other one surface of the third surface and the fourth surface;
a third block which is positioned between the first block and the fifth block;
a second block which is positioned between the first block and the third block; and
a fourth block which is positioned between the third block and the fifth block.

7. The arc path generation unit of claim 6 , wherein each surface on which the third block of the first Halbach array and the third block of the second Halbach array face each other is magnetized with the same polarity, and
wherein each surface on which the first block of the first Halbach array and the first block of the second Halbach array face each other, each surface on which the fifth block of the first Halbach array and the fifth block of the second Halbach array face each other and each surface on which the first magnet part and the second magnet part face each other are magnetized with a polarity different from the polarity.

8. An arc path generation unit, comprising:
a magnetic frame having a space part in which a plurality of fixed contacts and a movable contact are accommodated; and
a Halbach array which is positioned in the space part of the magnetic frame to form a magnetic field in the space part, and a magnet part which is provided separately from the Halbach array,
wherein the space part has a length in one direction formed to be longer than a length in the other direction,
wherein the magnetic frame comprises:
a first surface and a second surface which extend in the one direction and are disposed to face each other to enclose 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, and are disposed to face each other to enclose the remaining portion of the space part,
wherein the Halbach array comprises a plurality of blocks which are arranged side by side in the other direction and formed of a magnetic material, and is provided in plurality, and a plurality of Halbach arrays are positioned adjacent to any one or more surfaces of the third surface and the fourth surface, and
wherein the magnet part extends in the one direction and is provided in plurality, and a plurality of magnet parts are disposed adjacent to any one or more surfaces of the first surface and the second surface.

9. The arc path generation unit of claim 8 , wherein each surface on which the plurality of Halbach arrays face each other is magnetized with the same polarity, and
wherein each surface on which the plurality of magnet parts face each other is magnetized with a polarity different from the polarity.

10. The arc path generation unit of claim 8 , wherein the Halbach array comprises:
a first Halbach array which is positioned adjacent to any one surface of the third surface and the fourth surface; and
a second Halbach array which is positioned adjacent to the other one surface of the third surface and the fourth surface, and
wherein the magnet part comprises:
a first magnet part which is positioned adjacent to any one surface of the first surface and the second surface; and
a second magnet part which is positioned adjacent to the other one surface of the first surface and the second surface.

11. The arc path generation unit of claim 10 , wherein the first Halbach array and the second Halbach array respectively comprise:
a first block which is positioned to be biased toward the any one surface of the first surface and the second surface;
a third block which is positioned to be biased toward the other one surface of the first surface and the second surface; and
a second block which is positioned between the first block and the third block.

12. The arc path generation unit of claim 11 , wherein each surface on which the second block of the first Halbach array and the second block of the second Halbach array face each other is magnetized with the same polarity, and
wherein each surface on which the first magnet part and the second magnet part face each other is magnetized with a polarity different from the polarity.

13. A direct current relay, comprising:
a plurality of fixed contacts which are positioned to be spaced apart

Assignees

• Ls Electric Co Ltd

Inventors

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

Classifications

• H01H50/60

  moving contact being rigidly combined with movable part of magnetic circuit {(for polarised relays H01H51/2254, H01H51/2281)} · CPC title

• H01H9/443

  using permanent magnets · 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