Permanent magnet executor

Abstract

The invention discloses a permanent magnet operating mechanism used for driving mechanisms of circuit breakers, load switches and other equipment, which comprises a transmission rod, on which an armature is fixed, and opening coils are respectively arranged around the armature (sometimes it can be omitted). ), permanent magnets, pole shoes, closing coils and static iron cores. The upper and lower ends of the transmission rod pass through the upper and lower bushings. The upper and lower bushings are correspondingly inlaid on an upper end cover and a lower end cover. There is an auxiliary gasket on the lower end cover. The upper end cover is a pot-shaped structure, and the oblique angle inside the pot is the same as the corresponding taper angle of the armature. It is also possible to make the static iron core, the upper and lower end covers with pots, pole shoes, etc. into a whole. The invention adopts the design principles of electromagnetic operation and permanent magnet retention, and has simple mechanism, few moving parts and low failure rate. In particular, the pot-type end cover and tapered armature are used to improve the suction characteristics of the mechanism. It can be widely used in the field of medium and low voltage switches, and its production does not require very complicated processes and special materials, and can be easily mass-produced.

Description

technical field [0001] The invention belongs to the field of medium and low voltage switches, and relates to a permanent magnet operating mechanism applied to medium and low voltage switches such as circuit breakers and load switches. Background technique [0002] In the field of medium and low voltage switches, two kinds of switch operating mechanisms are generally used now. One is a spring energy storage type operating mechanism, and the other is an electromagnetic operating mechanism. In the actual use of the former, due to factors such as complex structure, many moving parts, large energy storage noise, high production process requirements, and low overall reliability, the switch sometimes refuses to move due to parts breakage, corrosion, out-of-stock, and stagnation. occur. And the latter, though simple in structure, still has the higher take-off, locking device of failure rate, and requires bigger operating work. Although the existing permanent magnet operating mech...

AI Technical Summary

Problems solved by technology

In the actual use of the former, due to factors such as complex structure, many moving parts, large energy storage noise, high production process requirements, and low overall reliability, the switch sometimes refuses to move due to parts breakage, corrosion, out-of-stock, and stagnation. occur

The latter, although simple in structure, still has a high failure rate of the release and locking device, and requires a large operating force.

Although the existing permanent magnet operating mechanism can solve the above problems well, there are often individual phenomena that the closing is not in place

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