An Electromagnetic Switch Using a Fork to Suppress Arc

Abstract

The invention discloses an electromagnetic switch employing shift fork arc extinguishing. The electromagnetic switch comprises a housing. The electromagnetic switch also comprises a contact component and an electromagnetic component respectively accommodated in the upper portion and the lower portion of the housing. The electromagnetic component comprises an excitation coil, a fixed core and a movable core. The contact component is housed in an arc extinguishing chamber in the upper part of the housing. A shift fork shaft is arranged at the opening portion of the upper side of the arc extinguishing chamber, and a shift fork is movably arranged on the shift fork shaft. The shift fork is connected with the shaft, and the tail end of the shift fork is hinged with a shift arm. The shift arm rotates relative to a support arm frame, and is controlled by a driving mechanism installed on the side wall of the housing. The electromagnetic switch employing shift fork arc extinguishing of the invention is simple in structure; the contact component is accommodated in the arc extinguishing chamber; and the shift fork is used to interfere with the path of a moving core in a prod mode to reduce or eliminate arcs generated on the moment of separating of a movable contact from a fixed contact, thereby substantially reducing damages by the arcs to the electromagnetic switch and parts of the electromagnetic switch and raising the usage cycle of the electromagnetic switch.

Description

technical field [0001] The invention relates to the technical field of electronic equipment, in particular to an electromagnetic switch using a shift fork for arc suppression. Background technique [0002] An electromagnetic switching device is an electrical switching device used as a connection converter to switch on / off the main circuit according to a small change in input current. In an electromagnetic switchgear, a contact point is moved by electromagnetic force, thereby applying or breaking a current. Electromagnetic switches are widely used in household [0003] Appliances and industrial products. In recent years, with the widespread development of electric vehicles such as hybrid vehicles, fuel cell vehicles, golf carts, etc., electromagnetic switches are being used in electric vehicles as DC power switches. [0004] When blocking the high-voltage DC power supply, the electromagnetic switch generates an arc. The arc is generated during the opening time when the mov...

AI Technical Summary

Problems solved by technology

In the prior art, the moving path of the movable core is generally straight up and down, so there is no buffer transition period during the time when the movable contact and the fixed contact are separated, so the generated arc is relatively large, which affects the electromagnetic switch. The damage is relatively large. At present, arc protection components are generally used to reduce the damage of the arc to the electromagnetic switch, but the protection effect is very small and there are always limitations.

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