An intelligent circuit breaker with double electromagnet structure

Abstract

The invention relates to an intelligent circuit breaker of a double-electromagnet structure. The intelligent circuit breaker of the double-electromagnet structure includes a moving contact, a static contact and a breaking actuator, and is characterized in that the breaking actuator comprises an upper electromagnet, a lower electromagnet, and an iron plate which is arranged between the two electromagnets. The upper and lower electromagnets are respectively used to close the electromagnet and open the electromagnet; the iron plate through a first linkage mechanism is connected with the moving contact; the upper and lower electromagnets are controlled to power on or power off so that the iron plate drives the first linkage mechanism; and the first linkage mechanism drives the moving contact to rotate so as to achieve separation and contact between the moving contact and the static contact. In the breaking actuator, a rotating shaft is placed at the central part of an entire rotating part, and gravities of two sides of the rotating shaft offset, so that the rotating part when moving only needs overcome friction and the difficulty that the rotating mechanism is quite large in mass is overcome; and the two electromagnets are used to control breaking of the circuit breaker, and the magnetic force of the electromagnets is controlled in order to obtain the satisfactory breaking capacity.

Description

technical field [0001] The invention belongs to the technical field of power supply and distribution equipment, and in particular relates to an intelligent circuit breaker. Background technique [0002] Circuit breakers are electrical equipment for control and protection in power systems. The breaking actuator plays the role of driving the moving contact in the circuit breaker, so that the moving contact and the static contact are closed or separated, so as to realize the on-off of the circuit. The advantages and disadvantages of the breaking actuator lie in the speed of separating the moving contact and the static contact, the faster the better! It is excellent if the breaking time can be controlled within 5 milliseconds in the industry. [0003] At present, the breaking actuators of similar products in the industry mainly include pure mechanical type and single electromagnet type. The purely mechanical breaking actuator is a combination of a set of sheet metal parts and...

AI Technical Summary

Problems solved by technology

The breaking capacity of the breaking actuator mechanism mainly depends on the magnetic force of the electromagnet in the mechanism and the tension of the spring. However, due to the large mass of the rotating mechanism and the fact that the spring tension cannot be infinitely increased, it is difficult to effectively improve the breaking capacity.

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