Rotating electric machine system, and combined power system equipped therewith

A rotating electric machine system is equipped with a rotor including permanent magnets and a rotating shaft. The rotating shaft is supported in a rotating electric machine housing via a first bearing and a second bearing. A first oil supply passage is formed in the rotating electric machine housing for supplying lubricating oil to the first bearing and the second bearing. Further, a rotor internal oil passage is formed in the interior of the rotor. A portion of the lubricating oil is diverted away from the first oil supply passage, and is supplied to the rotor internal oil passage.

Patent

Brief

Patent brief

Problem

How can vibration in electric motors and rotors be reduced?

Novelty

The rotating shaft is supported in a rotating electric machine housing via a first bearing and a second bearing.

Uses

Patent review

Assignee

HONDA MOTOR CO., LTD.

Published

Mar 10, 2026

Inventors

Naoki Ito, Yuichiro Mitsui, Tatsuya Choji

Domain

Electromechanical systems

Plain-English summary

Problem

How can vibration in electric motors and rotors be reduced?

Solution

rotating electric machine system is equipped with a rotor including permanent magnets and a rotating shaft.

Key novelty

The rotating shaft is supported in a rotating electric machine housing via a first bearing and a second bearing.

Applications

Patent review

Relevant search intents

40b02c229083

Claims preview

1 . A rotating electric machine system that is equipped with a rotating electric machine provided with a rotor including a permanent magnet and a rotating shaft, and is equipped with a rotating electric machine housing in which the rotating shaft is rotatably supported, the rotating electric machine system comprising: a first bearing and a second bearing that are interposed between the rotating electric machine housing and the rotating shaft; and an oil circulation supply device configured to circulate and supply lubricating oil to the first bearing and the second bearing, wherein the rotating electric machine housing includes: a first oil supply passage configured to supply the lubricating oil supplied from the oil circulation supply device to the first bearing and the second bearing; and a second oil supply passage configured to branch off from the first oil supply passage and to supply the lubricating oil toward the rotor, and wherein a rotor internal oil passage, through which the lubricating oil that flows out from the second oil supply passage is made to flow, is formed in an interior of the rotor, the rotating electric machine housing includes an oil discharge passage configured to discharge the lubricating oil, which has flowed through the first oil supply passage, the second oil supply passage, and the rotor internal oil passage, to the oil circulation supply device, the rotating electric machine system includes an oil guiding member that is provided on an outer surface of the rotating shaft, is configured to receive the lubricating oil from the second oil supply passage, and is configured to guide the lubricating oil to the rotor internal oil passage, and an inlet of the rotor internal oil passage is formed between the outer surface of the rotating shaft and the oil guiding member. 2 . The rotating electric machine system according to claim 1 , wherein the rotor includes a tubular member interposed between the rotating shaft and the permanent magnet in a radial direction of the rotating shaft, and at least a portion of the rotor internal oil passage is formed between an outer surface of the rotating shaft, and an inner circumferential wall of the tubular member. 3 . The rotating electric machine system according to claim 1 , wherein the rotor internal oil passage is a space configured to extend in an axial direction of the rotating shaft.

Rotating electric machine system, and combined power system equipped therewith

Plain-English summary

Related patents