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Intelligent control module for opening-closing electromagnets of circuit breaker

An intelligent control module, opening and closing technology, applied in circuits, electrical switches, electrical components, etc., can solve the problems of unreliable power system, increase the complexity of the secondary relay protection circuit, etc., to improve the success rate and avoid coil burnout , the effect of reducing costs

Active Publication Date: 2016-11-09
FUZHOU UNIV
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AI Technical Summary

Problems solved by technology

The above measures undoubtedly increase the complexity of the secondary relay protection circuit and introduce unreliable factors into the power system

Method used

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  • Intelligent control module for opening-closing electromagnets of circuit breaker

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Please refer to figure 1 , the present invention provides a circuit breaker opening and closing electromagnet intelligent control module, which is characterized in that: it includes an input power supply, a rectification filter circuit and a power electronic switch connected in sequence, and the input power supply becomes a stable DC voltage after rectification and filtering. The voltage is chopped by the power electronic switch to generate a high frequency square wave voltage; the output terminals of the power electronic switch are respectively connected to the input terminals of the closing coil and the opening coil, and the high frequency square wave voltage is applied to the closing coil and the two ends of the opening coil to obtain a stable coil current; the output ends of the closing coil and the opening coil are respectively connected wit...

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Abstract

The invention relates to an intelligent control module for opening-closing electromagnets of a circuit breaker. The intelligent control module comprises an input power supply, a rectifier and filter circuit and a power electronic switch, wherein the units are connected successively. The output terminal of the power electronic switch is connected with input terminals of a closing coil and an opening coil; output terminals of the closing coil and the opening coil are connected with a normally-open contact and a normally-closed contact of a single-pole double-throw relay. A fixed end of the single-pole double-throw relay is connected with an input terminal of a hall current sensor; an output terminal of the hall current sensor is connected with a controller connected an input terminal of an isolated drive circuit; and an output terminal of the isolated drive circuit is connected with the power electronic switch to complete closed-ring control of a coil current. According to the invention, closed-loop chopper control on coil currents of the opening-closing electromagnets is realized, so that the excitation way of the opening-closing electromagnets is changed fundamentally.

Description

technical field [0001] The invention relates to an intelligent control module of an opening and closing electromagnet of a circuit breaker. Background technique [0002] Electricity is the lifeblood of national economic development and the core of the overall deployment of national strategic energy. With the continuous development of the national economy and the continuous progress of science and technology, the society has higher and higher requirements for power quality, and the distribution network, as the end of the entire power grid, is one of the key links for the safe operation of the power grid. There are a large number of 10kV and 35kV circuit breakers in the power distribution network, which are one of the most important switching electrical equipment in the power system distribution network, controlling and protecting the normal operation of the entire distribution network. The opening and closing operation is to instantaneously impact the tripping detent through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/54H01H3/28
CPCH01H3/28H01H9/54
Inventor 汤龙飞许志红
Owner FUZHOU UNIV
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