Long-stroke high-voltage monostable permanent magnet operating mechanism with external disc spring

Abstract

The invention discloses a long-stroke high-voltage monostable permanent magnet operating mechanism with an external disc spring. The long-stroke high-voltage monostable permanent magnet operating mechanism comprises a permanent magnet retention mechanism, an electromagnetic driving mechanism, a switching-off spring and a guide rod, wherein the permanent magnet retention mechanism comprises a retention static iron core, a permanent magnet, a switching-off coil and a retention moving iron core; the electromagnetic driving mechanism comprises a switching-on coil, a driving static iron core and a driving moving iron core; a non-magnetic material gasket is arranged between the permanent magnet retention mechanism and the electromagnetic driving mechanism; an axial groove is formed in the outer side wall of the driving moving iron core; a groove and pear-shaped through-holes are formed in the retention static iron core; and the switching-off spring is installed in the groove of the retention static iron core, and lugs are arranged on the lower end of the retention static iron core as well as on the upper end of the retention moving iron core. The long-stroke high-voltage monostable permanent magnet operating mechanism increases the switching-on retention force through the lugs arranged on the retention static iron core and the retention moving iron core; and through the combination of the switching-off spring and the switching-off coil, the permanent magnetic mechanism can eliminate the retention force of the permanent magnet on the retention moving iron core quickly in action, so that the permanent magnetic mechanism is switched off quickly.

Description

technical field [0001] The invention relates to a long-stroke high-voltage monostable permanent magnet operating mechanism with an external disc spring, belonging to the field of high-voltage vacuum circuit breakers. Background technique [0002] With the advantages of small size, light weight, suitable for frequent operation, and no need for maintenance for arc extinguishing, vacuum circuit breakers quickly occupied the market of medium voltage circuit breakers, and further developed into the field of high voltage. There are usually three types of operating mechanisms for vacuum circuit breakers: electromagnetic type, spring type and permanent magnet type. Among them, the permanent magnet operating mechanism has attracted more and more attention due to its high reliability, low energy consumption, maintenance-free, and synchronous operation. High-voltage vacuum circuit breakers have larger requirements on the opening distance, which requires the operating mechanism to have...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a long-stroke high-voltage monostable permanent magnet ope

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