Miniaturized broadband current transformer

By designing a deployable shielding component and a detachable housing structure, the problems of poor shielding effect and inconvenient assembly of giant magnetoresistive current transformers are solved, achieving high-precision, stable, wide-band current measurement and structural miniaturization.

CN122348129APending Publication Date: 2026-07-07HUA TAI DIAN QI KE JI (HE NAN) YOU XIAN GONG SI
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Patent Information

Application Number
CN202610808867.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-05
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing giant magnetoresistive current transformers suffer from problems such as poor shielding effect, non-adjustable shielding range, inconvenient assembly, weak anti-interference capability, and unstable broadband measurement accuracy.

Method used

It adopts a deployable shielding component and a detachable shell structure, including a detachable first shell and second shell, a ring-shaped iron core, a winding component, an insulating component and a shielding component. The shielding component can be deployed and retracted through detachable connections and driving components. Combined with irregularly shaped antimagnetic strips and a mesh antimagnetic structure, the electromagnetic shielding effect is enhanced.

Benefits of technology

It improves the measurement stability and assembly convenience of current transformers, reduces the influence of external interference, and enhances wideband measurement accuracy and miniaturized structural design.

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Abstract

The invention discloses a miniaturized broadband current transformer, and the current transformer comprises a transformer body which comprises a first housing, a second housing detachably connected with the first housing, and storage cavities disposed in the first housing and the second housing, and the two storage cavities are communicated with each other; the current mutual inductance assembly comprises an annular iron core arranged in the storage cavity, a winding assembly arranged on the annular iron core and an insulating part arranged on the outer side of the annular iron core; the shielding assembly is arranged in the storage cavity, the detachable oppositely-buckled type shell is adopted, assembly and maintenance are convenient and fast, and micro arrangement is facilitated; circumferential self-adaptive shielding is achieved through the shielding assembly capable of being unfolded and folded, and stray magnetic field interference is effectively weakened in cooperation with an internal turbulent flow diamagnetic structure; and in combination with giant magnetoresistance sensing characteristics, broadband, high-precision and stable current detection is realized, and the operation reliability and the measurement accuracy of the mutual inductor are improved.
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