High voltage DC relay magnetic circuit system

Abstract

A magnetic circuit system of a high voltage direct current relay, comprising a U-shaped yoke (1), a lower magnetic conduction cylinder (2) fastened into the U-shaped yoke, a coil former (3) sheathed outside the lower magnetic conduction cylinder, and a movable core (4) of which the lower end is located in the magnetic conduction cylinder; a yoke plate (5)is arranged above the movable core; a stroke clearance (6) is arranged between the lower end surface of the yoke plate and the upper end surface of the movable core; an upper magnetic conduction cylinder (7) in annular arrangement is formed at the periphery of the stroke clearance; the movable core can reciprocate up and down in the upper magnetic conduction cylinder; and the upper magnetic conduction cylinder is fastened on the yoke plate. The magnetic circuit system of a high voltage direct current relay has the advantages of increasing the uniformity of magnetic force of the magnetic circuit system to the movable core in the whole stroke of the movable core and ensuring good contact between a movable contact and a stationary contact without increasing volume and production cost of the relay.

Description

technical field [0001] The invention relates to a high-voltage direct current relay, in particular to a magnetic circuit system of a high-voltage direct current relay. Background technique [0002] The high-voltage DC relay moves the moving iron core and the push rod fixed on the moving iron core up and down through the magnetic circuit system, so that the moving contact fixed on the top of the push rod moves up and down to contact or separate from the static contact. The magnetic force line density generated by the magnetic circuit system gradually decreases along the upward movement direction of the moving iron core. Therefore, when the moving iron core moves upward under the action of the magnetic force of the magnetic circuit system, the closer the moving iron core moves to the position close to the yoke iron plate, The smaller the magnetic force of the magnetic circuit system on the moving iron core is, the smaller the thrust the moving iron core will receive when it mo...

AI Technical Summary

Problems solved by technology

If the magnetic force received by the moving iron core from the magnetic circuit system is too small, the moving iron core and the push rod will not rise enough, making the moving contact unable to contact the static contact, or the moving contact and the static contact Poor contact

In order to ensure that the magnetic circuit system has enough magnetic force to drive the moving iron core to move during the entire upward movement of the moving iron core, the prior art method is to increase the power of the coil of the magnetic circuit system, that is, increase the number of turns of the coil, which will lead to The size of the relay increases and the manufacturing cost increases

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