Magnetic Latching Energy Saving HVDC Contactor

Abstract

The invention discloses a magnetic latching energy-saving high-voltage DC contactor, which comprises a magnetic shell with an opening in the upper end, and an insulating cover, wherein the insulating cover is hermetically fixed to the opening in the upper end; an arc extinguishing cover is arranged at the upper part of a sealed space formed by the magnetic shell and the insulating cover to form an arc extinguishing chamber, and a coil winding and an iron core are arranged at the lower part; a pair of main fixed contacts, a movable contact plate for forming two main movable contacts and a drive core bar for driving the movable contact plate to move up and down to open and close the pair of main fixed contacts are arranged in the arc extinguishing chamber; the inner side of the magnetic shell is provided with an annular first permanent magnet between the bottom of the arc extinguishing cover and the upper end surface of the coil winding; a magnetic pole piece is arranged between the first permanent magnet and the drive core bar; magnetic pole cores are arranged in an upper space between the coil winding and the iron core; and the upper ends of the magnetic pole cores are connected with the magnetic pole piece. The magnetic latching energy-saving high-voltage DC contactor is energy-saving, the temperature of the high-voltage DC contactor is greatly reduced, the reliability of a product is improved and the environment temperature application range of the product is expanded.

Description

technical field [0001] The invention relates to a high-voltage direct current contactor, in particular to a magnetic holding energy-saving high-voltage direct current contactor. Background technique [0002] At present, most of the DC contactor structures on the market are: including a sealed shell, and two static contacts installed in the inner cavity of the sealed shell, a moving contact piece and a driving mechanism. Arranged in opposite directions, the driving mechanism mainly includes a driving coil, a moving iron core, a push rod and a return spring. When the driving coil is energized, the magnetic force generated by it makes the push rod move vertically upwards, and drives the moving contact piece and the two static contacts at the same time. connected, the DC contactor is in the closed working state; when the drive coil is powered off, the push rod moves vertically downward under the action of the return spring to reset, and drives the moving contact piece to disconn...

AI Technical Summary

Problems solved by technology

However, when the above-mentioned DC contactor structure is closed, the drive coil needs to be in the energized state all the time, which not only consumes a lot of power, but also generates serious heat, which greatly affects the reliability of the product and limits the applicable field of the product.

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