US 12,062,509 B2Granted

ARC path forming unit and direct current relay including same

AssigneeLs Electric Co., Ltd.

InventorsJinhee Park, Jungwoo Yoo

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Abstract

An arc path forming unit and a direct current relay including same are illustrated. The arc path forming unit according to an embodiment of the present invention comprises multiple magnets. Each of the magnets is configured to form a magnetic field at a point where each stationary contact is located. Each of the magnets located adjacent to each stationary contact is configured such that the opposite surfaces thereof have different polarities. A current flowing through a stationary contact and a movable contact and a magnetic field formed by each of the magnets generate an electromagnetic force. The electromagnetic force travels in a direction away from the center of the direct current relay. Therefore, a generated arc travels in the direction of the electromagnetic force and is thus moved in a direction away from the center of the direct current relay. Accordingly, the direct current relay can be prevented from being damaged.

Claims20

Dependent claims

An arc path forming unit, comprising:

a magnet frame having an inner space, and comprising a plurality of surfaces surrounding the inner space;
and
magnets coupled to the plurality of surfaces to form magnetic fields in the inner space,
wherein the plurality of surfaces comprises:
a first surface extending in one direction;
and
a second surface disposed to face the first surface and extending in the one direction,
wherein an arc discharge opening is formed at a middle portion of each of the first surface and the second surface in a longitudinal direction that respectively divides the first surface into a first side and a second side, and the second surface into a third side and a fourth side, wherein the third side is opposite to the first side and the fourth side is opposite to the second side,
wherein the magnets comprise:
a first magnet located on one the first side of the first surface, wherein the second side of the first surface is free of magnets;
surface in the extending direction;
and
a second magnet located on another the fourth side of the second surface, wherein the third side of the second surface is free of magnets, surface in the extending direction, another side being opposite to the one side,
wherein a first facing surface of the first magnet diagonally facing the second magnet and a second facing surface of the second magnet diagonally facing the first magnet have a same polarity. polarity;
and
wherein an arc discharge opening is formed at a middle portion of each of the first surface and the second surface in a longitudinal direction.

13 more elements

A direct current relay, comprising:

a fixed contactor extending in one direction;
a movable contactor configured to be brought into contact with or separated from the fixed contactor;
an arc path forming unit having an inner space for accommodating the fixed contactor and the movable contactor, and configured to produce a magnetic field in the inner space so as to form a discharge path of an arc generated when the fixed contactor and the movable contactor are separated from each other,
wherein the arc path forming unit comprises:
a magnet frame having an inner space, and comprising a plurality of surfaces surrounding the inner space;
and
magnets coupled to the plurality of surfaces,
wherein the plurality of surfaces comprises:
a first surface extending in one direction;
and
a second surface disposed to face the first surface and extending in the one direction,
wherein an arc discharge opening is formed at a middle portion of each of the first surface and the second surface in a longitudinal direction that respectively divides the first surface into a first side and a second side, and the second surface into a third side and a fourth side, wherein the third side is opposite to the first side and the fourth side is opposite to the second side,
wherein the magnets comprise:
a first magnet located on one the first side of the first surface, wherein the second side of the first surface is free of magnets;
surface in the extending direction;
and
a second magnet located on another the fourth side of the second surface, wherein the third side of the second surface is free of magnets, surface in the extending direction, another side being opposite to the one side,
wherein a first facing surface of the first magnet diagonally facing the second magnet and a second facing surface of the second magnet diagonally facing the first magnet have a same polarity. polarity;
and
wherein an arc discharge opening is formed at a middle portion of each of the first surface and the second surface in a longitudinal direction.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/638,702Filed 7 Apr 2020
Priority: KR 10-2019-010606328 Aug 2019
Published: US 2022/0415593 A129 Dec 2022
Granted: 13 Aug 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01H 33/182
Using blow-out magnet: using permanent magnets
H01H 50/60
Contact arrangements: moving contact being rigidly combined with movable part of magnetic circuit
H01H 9/443
Using blow-out magnet: using permanent magnets
H01H 33/53
Details: cases ; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief…