Coil assembly

By using a design where the saturation magnetostriction constant of the first magnetic material in the coil assembly is smaller than that of the second magnetic material, the magnetic flux density is adjusted, thus solving the acoustic noise problem caused by the vibration of the coil assembly and achieving effective noise reduction and substrate stability.

CN122291256APending Publication Date: 2026-06-26SAMSUNG ELECTRO MECHANICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SAMSUNG ELECTRO MECHANICS CO LTD
Filing Date
2025-12-22
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The vibrations induced by the coil assembly when periodic pulses are applied result in acoustic noise, which can cause interference, especially in sensitive applications, and existing technologies struggle to effectively reduce this noise.

Method used

By designing the main material of the coil assembly, the saturation magnetostriction constant of the first magnetic material is smaller than that of the second magnetic material, and the magnetic flux density is adjusted in the structure to reduce magnetostriction and noise.

Benefits of technology

It effectively reduces the acoustic noise of the coil assembly, reduces substrate vibration and noise interference, and improves performance in sensitive environments.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122291256A_ABST
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Abstract

This disclosure provides a coil assembly comprising: a first body containing a first magnetic material; and a second body disposed on an upper surface of the first body, the second body containing a second magnetic material. An insulating layer is disposed on the upper surface of the second body, and a coil is at least partially disposed in the second body and extends to the surface of the second body. The saturation magnetostriction constant of the first magnetic material is smaller than that of the second magnetic material, thereby reducing magnetostriction in the lower portion of the coil assembly and suppressing acoustic noise.
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