A mutual inductance sensor for smart grid system intelligent detection

By having multiple core groups alternately in clamping and disengaging modes, stable lubrication and high-precision measurement of mutual inductance sensors are achieved, solving the problems of iron core wear and lubrication, and meeting the high reliability requirements of smart grids.

CN122216236BActive Publication Date: 2026-07-21SHANXI XINCI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI XINCI TECH CO LTD
Filing Date
2026-05-20
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The iron core of existing mutual inductance sensors is prone to wear and tear due to movement, making maintenance difficult and affecting measurement accuracy and service life. Furthermore, traditional lubrication methods require shutdown operations, which cannot meet the needs of uninterrupted operation of power grid equipment.

Method used

Multiple core groups are alternately in clamping and disengaging modes. Continuous lubrication is achieved through the rolling contact between the balls and the guide rod and the supply of lubricating oil in the lubrication chamber, ensuring stable movement and lubrication of the iron core and avoiding friction and wear.

Benefits of technology

Without shutting down or disassembling the system, high-precision measurement and long-life operation of mutual inductance sensors were achieved, reducing maintenance costs and meeting the smart grid's demand for highly reliable sensing equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of measurement, in particular to a mutual inductance sensor for intelligent detection of a power grid system, which comprises a shell, a coil group and a core group. A plurality of guide rods are arranged in the shell. The coil group comprises a primary coil and two secondary coils. The core group is slidably arranged on the guide rods and located on the inner side of the primary coil, and at least two core groups are provided and have a clamping mode and a separation mode. In the clamping mode, the rolling balls of the bearing unit are in rolling contact with the guide rods. In the separation mode, the rolling balls of the bearing unit are out of contact with the guide rods, and a lubricating cavity provides lubricating oil for the rolling balls. The plurality of core groups are arranged to move synchronously, and the plurality of core groups are alternately in the clamping mode and the separation mode during movement, so that the rolling balls are supplied with oil in a state of not being extruded, the lubricating oil is beneficial to flowing at the rolling balls, the formation of the oil film is facilitated, and at least one core group is in rolling contact with the guide rods during movement along the guide rods, so that oil supplement is completed in a non-stop state.
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