Electromagnetic force driving mechanism of an SF6 high voltage circuit breaker

Abstract

An electromagnetic force driving mechanism of an SF6 high voltage circuit breaker belongs to the technical field of power transmission and transformation equipment. The mechanism comprises the SF6 high voltage circuit breaker, a connecting rod and the electromagnetic force driving mechanism, wherein, a transmission rod of the electromagnetic force driving mechanism is connected with the connecting rod; the electromagnetic force driving mechanism comprises a primary core, a secondary core, a main permanent magnet, an auxiliary permanent magnet, a magnetism isolating material, a winding coil and the transmission rod; the secondary core of the electromagnetic force driving mechanism is subjected to effects of electromagnetic force in a magnetic field, so as to drive the moving contact of the SF6 high voltage circuit breaker to conduct a switching/closing movement; and the auxiliary permanent magnet of the electromagnetic force driving mechanism causes a switching/closing position of the high voltage circuit breaker to be kept fixed. The mechanism has the advantages that by adopting the auxiliary permanent magnet, the switching/closing position of the high voltage circuit breaker is caused to be kept fixed; the mechanism has a small mass and a small inertia, and is easy to control; the winding coil is arranged in the secondary core; and the secondary core moves to drive the winding core to move, thereby preventing loss of excitation of the mechanism.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation equipment, in particular to a SF 6 Electromagnetic drive mechanism of high-voltage circuit breaker, a new type of operating mechanism suitable for intelligent operation. Background technique [0002] High-voltage circuit breaker is an important switchgear in power system, which is responsible for the dual tasks of control and protection. Its performance is one of the important factors to determine whether the power system can operate safely. As people's requirements for power supply quality and reliability are getting higher and higher, the requirements for the reliability and maintenance-free of high-voltage circuit breakers are also getting higher and higher. One of the key components of opening and closing performance, its performance will directly affect the technical performance of the circuit breaker. Therefore, the working reliability of the circuit breaker ...

AI Technical Summary

Problems solved by technology

The previous operating mechanisms mainly include hydraulic operating mechanisms, spring operating mechanisms or pneumatic operating mechanisms. Most of them have many parts, complex transmission mechanisms, or high manufacturing process requirements, and the movement process is uncontrollable.

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