CURRENT SENSOR

To provide a magnetic field detection type current sensor which uses a core preventing a short-circuit due to contact between a winding and a shield.SOLUTION: A sensor unit 20 of a current sensor comprises an annular core 222, an upper core case 224U and a lower core case 224L for housing the core,...

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Bibliographic Details
Main Authors MORI KENJI, YOSHINARI TETSUYA
Format Patent
LanguageEnglish
Japanese
Published 01.11.2021
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:To provide a magnetic field detection type current sensor which uses a core preventing a short-circuit due to contact between a winding and a shield.SOLUTION: A sensor unit 20 of a current sensor comprises an annular core 222, an upper core case 224U and a lower core case 224L for housing the core, a winding 260 wound around the upper core case 224U and the lower core case 224L, and a magnetic shield 28 partly covering at least the winding 260. The upper core case 224U and the lower core case 224L are provided with a plurality of protrusions 240 protruding outward. The winding 260 is wound around the upper core case 224U and the lower core case 224L avoiding the protrusions 240. Each protrusion 240 has a protrusion amount size greater than a winding thickness size of the winding 260. Each protrusion 240 also faces the magnetic shield 28.SELECTED DRAWING: Figure 7 【課題】巻線とシールドとの接触による短絡を防止したコアを用いる磁場検出型の電流センサを提供する。【解決手段】電流センサのセンサ部２０は、環状のコア２２２と、コアを収容する上側コアケース２２４Ｕ、下側コアケース２２４Ｌと、上側コアケース２２４Ｕ、下側コアケース２２４Ｌに巻回された巻線２６０と、巻線２６０を少なくとも部分的に覆う磁気シールド２８と、を備える。上側コアケース２２４Ｕ、下側コアケース２２４Ｌには、外側へ突出する複数の突起部２４０が設けられている。巻線２６０は、突起部２４０を避けてコ上側コアケース２２４Ｕ、下側コアケース２２４Ｌに巻回されている。突起部２４０の夫々は、巻線２６０の巻厚サイズよりも大きい突出量サイズを有している。突起部２４０の夫々は、磁気シールド２８に面している。【選択図】図７
Bibliography:Application Number: JP20200077976