Rotating electric machine

The rotating electric machine design addresses the challenge of cooling and protecting the power receiving device by incorporating an oil passage that overlaps with the wiring, ensuring efficient cooling and protection from oil.

JP2026119870APending Publication Date: 2026-07-21AISIN CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
AISIN CORP
Filing Date
2025-01-08
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing rotating electrical machines face challenges in efficiently cooling the wiring between the power receiving device and the coil wire while protecting the power receiving device from oil, particularly in contact and non-contact power supply methods.

Method used

A rotating electric machine design that includes a stator and a wound field magnet rotor with a rotor shaft having an internal oil passage, a rotating member covering the rotor shaft's axial end, and a power supply device connected to a power receiving device via wiring, where the oil passage overlaps with the wiring to provide efficient cooling and protection from oil.

Benefits of technology

The design effectively protects the power receiving device from oil while efficiently cooling the wiring, enhancing the machine's reliability and durability.

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  • Figure 2026119870000001_ABST
    Figure 2026119870000001_ABST
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Abstract

The wiring between the power receiving device and the coil wire is efficiently cooled while protecting the power receiving device from oil. [Solution] A rotating electric machine is disclosed comprising: a stator in a first space; a wound field rotor in the first space; a rotating member mounted on the axial end of the rotor shaft in such a manner that it covers the axial end face and outer circumferential surface of the rotor shaft, and which rotates coaxially with the rotor shaft, wherein one axial end of the rotating member is located in the first space and the other axial end is located in a second space partitioned from the first space; a power supply device electrically connected to a power source; a power receiving device electrically connected to a coil wire, which is provided at the other axial end of the rotating member and receives power from the power supply device in a contact or non-contact manner; and wiring provided axially on the rotating member and electrically connecting the power receiving device and the coil wire, wherein the rotor shaft has a first oil passage inside, and the first oil passage and the wiring overlap in the axial direction of the rotor shaft.
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