Double-iron-core direct-current-component-resistant current transformer

Abstract

The invention discloses a double-iron-core direct current component resisting current transformer. Comprising a mutual inductor iron-based double magnetic core, a mutual inductor magnetic core insulating shell, a mutual inductor magnetic core insulating cover plate, a mutual inductor secondary side winding and a mutual inductor packaging shell, wherein the mutual inductor secondary side winding is wound on the outer sides of the mutual inductor magnetic core insulating shell and the mutual inductor magnetic core insulating cover plate; the mutual inductor packaging shell is arranged on the outer side of the mutual inductor secondary side winding in a sleeving manner and is of an annular structure; the mutual inductor packaging cover plate is matched with the mutual inductor packaging shell, and a mutual inductor primary side binding post is further arranged at a central through hole of the mutual inductor packaging shell; the transformer iron-based double magnetic cores comprise an iron-based nanocrystalline magnetic core and an iron-based amorphous magnetic core which are of an annular structure, the iron-based nanocrystalline magnetic core is arranged on the outer side of the iron-based amorphous magnetic core in a sleeving mode, and the iron-based nanocrystalline magnetic core and the iron-based amorphous magnetic core are coaxially arranged. The control circuit is not easy to magnetize and saturate when a large direct current component exists, so that the accuracy and the safety of the control circuit are guaranteed.

Description

technical field [0001] The invention relates to the technical field of current transformers, in particular to a dual-core anti-DC component current transformer. Background technique [0002] The current transformer is an electrical device that induces a small current of a certain ratio on the secondary side according to the large current of the main circuit flowing through the primary side for the instrument to realize measurement and relay protection. The current transformer is mainly composed of a closed iron core, a primary Composed of side winding and secondary side winding; current transformers are widely used in modern industries, such as inductive power acquisition, measurement of power parameters, etc., and can be used to separate high-voltage systems to ensure the safety of people and equipment . With the development of technology, a large number of frequency conversion, switching power supply and rectification equipment are used in the existing industrial and civi...

AI Technical Summary

Problems solved by technology

With the development of technology, a large number of frequency conversion, switching power supply and rectification equipment are used in the existing industrial and civil circuit systems. The large number of applications of these equipment will lead to a certain DC component in the line. When the DC component is large, it is easy to be saturated by magnetization, so that a high enough voltage cannot be induced in the secondary side winding, which will cause a huge error to the control circuit and easily lead to safety accidents

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