Cooling structure for dynamo-electric machine
US-2018205294-A1 · Jul 19, 2018 · US
Electric motor
US12587052B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12587052-B2 |
| Application number | US-202318507673-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 13, 2023 |
| Priority date | Nov 14, 2022 |
| Publication date | Mar 24, 2026 |
| Grant date | Mar 24, 2026 |
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- Title
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- Abstract
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- Assignees and inventors
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- Key dates
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
An electric motor disclosed herein may comprise a rotor core fixed to a shaft, a stator, and first and second refrigerant passages. The stator may include coil ends at both ends. The first refrigerant passage may be provided in the shaft and arranged outside the rotor core in an axial direction of the shaft. The second refrigerant passage may extend inside the rotor core. A first outlet of the first refrigerant passage may be provided on the shaft, and an ejecting direction of refrigerant at the first outlet may be directed towards one of the coil ends. The rotor core is cooled by the refrigerant flowing in the second refrigerant passage. The coil ends are cooled by the refrigerant flowing in the first refrigerant passage, that is, the refrigerant that has not cooled the rotor.
First claim
Opening claim text (preview).
What is claimed is: 1 . An electric motor comprising: a shaft rotatably supported by a housing; a rotor core fixed to the shaft; a stator arranged outside the rotor core in a radial direction of the rotor core, the stator including coil ends at both ends; a first refrigerant passage provided in the shaft and arranged outside the rotor core in an axial direction of the shaft; and a second refrigerant passage extending inside the rotor core, wherein a first outlet of the first refrigerant passage is provided on the shaft, an ejecting direction of the refrigerant at the first outlet is directed towards one of the coil ends, a second outlet of the second refrigerant passage is provided on the shaft, and an ejecting direction of the refrigerant ejected from the second outlet crosses the ejecting direction of the refrigerant ejected from the first outlet. 2 . The electric motor according to claim 1 , wherein the second refrigerant passage is provided inside the shaft.
Assignees
Inventors
Classifications
- H02K9/19Primary
for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title
- H02K1/32Primary
with channels or ducts for flow of cooling medium · CPC title
Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title
specially adapted for liquids, e.g. cooling jackets · CPC title
Fastening of winding heads, equalising connectors, or connections thereto · CPC title
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- What does patent US12587052B2 cover?
- An electric motor disclosed herein may comprise a rotor core fixed to a shaft, a stator, and first and second refrigerant passages. The stator may include coil ends at both ends. The first refrigerant passage may be provided in the shaft and arranged outside the rotor core in an axial direction of the shaft. The second refrigerant passage may extend inside the rotor core. A first outlet of the …
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02K9/19. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 24 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).