A vacuum breaker for dual stabilized permanent magnetic machine

Abstract

The utility model relates to a vacuum circuit breaker with bi-stable permanent magnetic mechanism, comprising a breaking device connected with each cable respectively, wherein a control end of the breaking device is hinged with a driven arm respectively, each driven arm is fixedly connected with the same rotating shaft, the driving arm is also fixedly connected with the rotating shaft, the driving arm is connected with a bi-stable permanent magnet switch mechanism, an output shaft is positioned in a housing of the bi-stable permanent magnet switch mechanism and passes through the two end covers at both ends of the casing and extended out, wherein one end is hinged with the driving arm, an iron core is fixedly arranged on the output shaft inside the housing, a permanent magnet is positioned outside the iron core and fixedly connected with the inner wall of the housing, two groups of pulse coil are positioned between both ends of the permanent magnet and the end covers; a opening boosting spring of the breaker is also connected with the driving arm. The utility model has the advantages of steady opening speed of the circuit breaker and small mechanical impact force.

Description

technical field [0001] The invention relates to a bistable permanent magnet mechanism vacuum circuit breaker. Background technique [0002] Power equipment switches often use vacuum circuit breakers. When using vacuum circuit breakers, the faster the breaking speed and the shorter the time, the better, because arcs are easy to occur when the moving contacts and static contacts of high-voltage electrical equipment are close. The faster the breaking speed, the shorter the arc generation time, and the less damage to the equipment. In order to obtain a faster opening and closing speed, and to avoid the state of non-opening and closing or opening and closing during manual operation, bistable permanent magnet mechanisms are often used in vacuum circuit breakers. The characteristic of the bistable permanent magnet operating mechanism is that as long as an initial force is applied when opening and closing, the moving contact and the static contact can completely complete the openin...

AI Technical Summary

Problems solved by technology

However, due to the short action distance of the compression spring, in the later stage of the opening process, after losing the effect of the compression spring, the opening speed will be significantly reduced, resulting in a large change in speed during the opening period, which is not conducive to the arc extinguishing of the contacts, and also makes the equipment The design difficulty increases

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