Vacuum contactor with mixed magnetic field

Abstract

The invention discloses a vacuum contactor with a mixed magnetic field, which belongs to the technical field of switches and adopts the mixed magnetic field with the combination of a permanent magnetic field and an electromagnetic field for replacing the single electromagnetic field or the permanent magnetic field; and the whole structure comprises a vacuum interrupter, a permanent magnetic mechanism, a conversion mechanism, insulated pull rods, a frame, an electromagnetic mechanism, an electronic control mechanism, an armature, a spring and the like, wherein the permanent magnetic mechanism is connected with the conversion mechanism, the electronic control mechanism is connected with a closing and opening coil and an electromagnetic ring in the permanent magnetic mechanism through conducting wires, and the three-phase insulated pull rods are connected on the conversion mechanism. The vacuum contactor can avoid the open-failure of the permanent magnetic alternating vacuum contactor, realize the functions of reactive power compensation and automatic switching and lead the overall manufacturing cost to be lower.

Description

Vacuum contactor with mixed magnetic field technical field The invention relates to a high-voltage switch with an arc extinguishing device, in particular to a vacuum contactor with a mixed magnetic field using a permanent magnetic field and an electromagnetic field. Background technique Vacuum contactors are used to frequently switch on and off the normal working current. They are usually used for long-distance connection and disconnection of medium and low voltage AC motors that start and stop frequently. They are especially suitable for coal mines, chemical industries and other industries. Vacuum contactors are mainly made of The vacuum interrupter is composed of a vacuum interrupter and an operating mechanism. The vacuum interrupter has two functions of reliably extinguishing the arc when passing the normal working current and frequently cutting off the working current, but it cannot cut off the overload current and short-circuit current. The vacuum contactor is compose...

AI Technical Summary

Problems solved by technology

The traditional high-voltage vacuum contactor uses an electromagnetic operating mechanism, which consumes too much power when closing the switch, requiring the user to equip an expensive battery pack. In addition, the structure of the electromagnetic operating mechanism is heavy and the operating time is long; With the introduction of permanent magnet technology, most of the existing vacuum contactors use the vacuum contactor of the permanent magnet operating mechanism, which uses the permanent magnet operating mechanism instead of the electromagnetic operating mechanism, and uses the permanent magnetic force to control the closing of the contacts. However, in actual use, the contact cannot be released after a period of use of the permanent magnet operating mechanism. Due to the stable permanent magnetic force generated by the permanent magnet, unstable voltage and insufficient spring force, the armature often cannot be released. As a result, the dynamic and static contacts cannot be disconnected, and it is easy to cause a control failure in the vacuum contactor, which affects the normal production; in addition, the existing vacuum contactor has a relatively complicated structure, which makes the manufacturing cost higher

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