Rotating electric machine

The rotating electric machine addresses rotor deformation by employing a dual-rotor design with a clamping and hooking mechanism, dispersing stress and preventing deformation through stress cancellation and fixation to the shaft.

WO2025243776A1PCT designated stage Publication Date: 2025-11-27DENSO CORP
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Patent Information

Application Number
PCT/JP2025/015891
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-05-22
Filing Date
2025-04-24
Publication Date
2025-11-27

AI Technical Summary

Technical Problem

The rotor in axial gap motors is prone to deformation due to the attractive force between the rotor and the stator, which can lead to structural instability.

Method used

A rotating electric machine design featuring a stator with a coil portion, a rotating shaft, a first rotor with a first magnet and base portion, a second rotor with a second magnet and base portion, and a hooking and clamping mechanism to fix the base portions to the shaft, dispersing stress and preventing deformation.

Benefits of technology

The design effectively cancels out stresses between the base portions and fixes them to the shaft, preventing stress concentration and rotor deformation, enhancing structural integrity.

✦ Generated by Eureka AI based on patent content.

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Abstract

A motor (61) has a stator (200), rotors (300a, 300b), and a shaft (340). The rotors (300A, 300B) have magnets (310A, 310B) and base parts (315A, 315B). The base parts (315A, 315B) have holders (320A, 320B) and intermediate members (330A, 330B). The holders (320A, 320B) hold the magnets (310A, 310B). The intermediate members (330A, 330B) are fixed to the shaft part (340) by using nuts (345A, 345B) and a shaft flange (342). A first nut (345A) and a second nut (345B) are in a state in which the intermediate members (330A, 330B) are sandwiched thereby in the axial direction (AD).
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Citation Information

Patent Citations

  • Motor and generator

    CN117937811A

  • JP1990133182U

  • Multiple disk dewatering apparatus

    JP2008012442A

  • Improved rotor assembly for axial flux machines

    JP2022553874A