Circuit breaker directly connected/disconnected by electromagnetic force

Abstract

The invention discloses a circuit breaker directly connected / disconnected by electromagnetic force. The circuit breaker comprises fixed and moving contacts, a shell, an arcing chamber and the like. Two fixed contacts (3 and 5) are arranged at two ends of a chute (15) of the shell; a moving contact (4) is arranged between the two fixed contacts (3, 5) in the chute (15) and can freely slide in the chute; a permanent magnet (8) is arranged in a cavity of the moving contact (4); magnetic coils (7 and 9) are arranged in the cavities of the fixed contacts (3 and 5); an incoming line (1) is connected with the moving contact (4) through a soft connector (6); a control outgoing line (11) of the magnetic coil (7) of the fixed contact (3) and a control outgoing line (12) of the magnetic coil (9) of the fixed contact (5) perform field direction control under the action of a connecting / disconnecting control module of the circuit breaker; a connecting rod (14) is arranged at the rear end of the moving contact; and the arcing chamber (16) is arranged on the chute (15). The circuit breaker has the advantages that: each contact is directly and rapidly connected or disconnected through the electromagnetic force, and an arc is rapidly extinguished by a strong magnetic field.

Description

technical field [0001] The invention relates to the field of AC and DC power supply circuit breakers, in particular to a circuit breaker which uses electromagnetic force to directly open and close. Background technique [0002] At present, the DC fast circuit breaker is basically composed of an arc extinguishing cover, a contact chamber, a contact, a tripping device, an opening and closing indicating device, an opening and closing permanent magnet motor and a housing. There are some problems in the process of opening and closing of the circuit breaker, mainly in the control speed of opening and closing. The principle is to control the opening and closing process of moving contacts by converting electrical energy into magnetic energy and then converting mechanical energy. The conversion process from separation to closure or closure to separation takes a lot of time, which puts forward higher requirements for arc extinguishing control, and now the arc extinguishing is realize...

AI Technical Summary

Problems solved by technology

The conversion process from separation to closure or closure to separation takes a lot of time, which puts forward higher requirements for arc extinguishing control, and now the arc extinguishing is realized through the arc extinguishing cover and magnetic induction and magnetic blowing devices, but The effect is not very good, because once the DC arc is generated, it will continue, which will have a fatal impact on the service life of the circuit breaker contacts. In severe cases, it will burn the equipment and endanger personal safety.

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