Stator temporarily assembled into a ring shape

The annular stator design with odd-numbered connected cores and even-numbered pieces addresses winding challenges, reducing vibration and noise while improving productivity.

JP7727690B2Active Publication Date: 2025-08-21MINEBEAMITSUMI INC
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Patent Information

Application Number
JP2023126331
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2018-08-24
Filing Date
2023-08-02
Publication Date
2025-08-21
Estimated Expiration
2039-05-31

AI Technical Summary

Technical Problem

Conventional stators formed from multiple segments face challenges in winding coils due to narrow spaces around the teeth, leading to reduced productivity and increased vibration noise.

Method used

A stator assembled in an annular shape comprising a plurality of connected cores with insulators and coils, where the number of connected cores is odd or prime, and the number of pieces is even, allowing for easier coil winding and improved rigidity against vibration modes.

Benefits of technology

This configuration reduces vibration and noise while enhancing productivity by facilitating efficient coil winding and maintaining high rigidity against circular vibration modes.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To reduce stator vibration and improve productivity.SOLUTION: A motor according to an embodiment includes a stator. The stator includes a plurality of connection cores. The connection core includes a plurality of pieces connected via connection portions. A side portion of the connection portion includes a recess. The plurality of connection cores are arranged in a ring. An elastic member is disposed in the recess. The elastic member is disposed in a portion of the recesses of the plurality of connection cores.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Motor

    JP2000152529A

  • Sintered core joint structure and process for producing same

    JP2007288852A

  • Rotary electric machine

    JP2013094059A