Encoder

The encoder efficiently generates power using magnetic fields by guiding and concentrating the field with intersecting vertical and horizontal plate portions, addressing the inefficiencies in battery-less encoders.

JP2025102190APending Publication Date: 2025-07-08FUJI ELECTRIC CO LTD
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Patent Information

Application Number
JP2023219492
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2025-07-08

AI Technical Summary

Technical Problem

Existing battery-less encoders face challenges in efficiently generating power using the Barkhausen effect from a magnetic field.

Method used

The encoder incorporates a power generation element with first and second end portions, intersecting vertical plate portions made of magnetic material, and horizontal plate portions to efficiently guide and concentrate the magnetic field for power generation.

Benefits of technology

This configuration enhances power generation efficiency in the power generation element, enabling stable power output even at low speeds and eliminating the need for a battery.

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Abstract

To provide an encoder that efficiently generates power at a power generation element.SOLUTION: An encoder includes: a power generation element which has a first end portion and a second end portion spaced apart in a first direction and generates power by a magnetic field generated by a magnet fixed to a rotary shaft varying between the first end portion and the second end portion; a first member having a first vertical plate portion that is provided facing the first end portion and extends along a second direction intersecting the first direction, and being formed of a magnetic material; and a second member spaced apart from the first member, and having a second vertical plate portion that is provided facing the second end portion and extends along the second direction, and being formed of the magnetic material.SELECTED DRAWING: Figure 7
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Citation Information

Patent Citations

  • Rotation detector and motor equipped with same

    WO2021044758A1