Oil Temperature Control System for Electric Vehicle
US-2024266986-A1 · Aug 8, 2024 · US
Magnet temperature information output device and rotating electrical machine
US11728712B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11728712-B2 |
| Application number | US-202017005909-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 28, 2020 |
| Priority date | Sep 4, 2019 |
| Publication date | Aug 15, 2023 |
| Grant date | Aug 15, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A magnet temperature information output device is disposed on a rotating electrical machine including a stator and a rotor with a permanent magnet, and is arranged to output temperature information regarding a temperature of the permanent magnet. The magnet temperature information output device includes an element arranged to detect a magnetic flux and output an electrical signal responding to the detected magnetic flux as the temperature information. The element is disposed on the stator.
First claim
Opening claim text (preview).
What is claimed is: 1. A magnet temperature information output device that is disposed on a rotating electrical machine including a stator and a rotor with a permanent magnet and is arranged to output temperature information regarding a temperature of the permanent magnet, the device comprising: a first element comprising: a temperature sensor that is disposed on the rotor and is arranged such that an electrical resistance of the temperature sensor changes in response to the temperature of the permanent magnet; and a first coil that is disposed on the rotor and is electrically connected to the temperature sensor, and a second element comprising: a second coil that is disposed on the stator and is arranged to excite the first coil; and an electric-current sensor that is disposed on the stator and is arranged to output an electrical signal responding to a magnitude of a current flowing through the second coil and indirectly detect a magnetic flux generated in the second coil, the second element being arranged to detect the magnetic flux generated in the second coil and output the electrical signal as the temperature information. 2. The magnet temperature information output device according to claim 1 , the first element further comprising: a capacitor that is disposed on the rotor and forms an LC resonance circuit together with the first coil. 3. A rotating electrical machine, comprising: a stator; a rotor with a permanent magnet; and a magnet temperature information output device arranged to output temperature information regarding a temperature of the permanent magnet, wherein the magnet temperature information output device includes: a first element comprising: a temperature sensor that is disposed on the rotor and is arranged such that an electrical resistance of the temperature sensor changes in response to the temperature of the permanent magnet; and a first coil that is disposed on the rotor and is electrically connected to the temperature sensor, and a second element comprising: a second coil that is disposed on the stator and is arranged to excite the first coil; and an electric-current sensor that is disposed on the stator and is arranged to output an electrical signal responding to a magnitude of a current flowing through the second coil and indirectly detect a magnetic flux generated in the second coil, the second element being arranged to detect the magnetic flux generated in the second coil and output the electrical signal as the temperature information. 4. The rotating electrical machine according to claim 3 , wherein the first element of the magnet temperature information output device further includes a capacitor that is disposed on the rotor and forms an LC resonance circuit together with the first coil.
Assignees
Inventors
Classifications
Electric machine technologies in electromobility · CPC title
- H02K11/25Primary
Devices for sensing temperature, or actuated thereby · CPC title
using resistive elements · CPC title
using magnetic elements, e.g. magnets, coils (magnetic elements per se H01F) · CPC title
with magnets rotating within the armatures · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11728712B2 cover?
- A magnet temperature information output device is disposed on a rotating electrical machine including a stator and a rotor with a permanent magnet, and is arranged to output temperature information regarding a temperature of the permanent magnet. The magnet temperature information output device includes an element arranged to detect a magnetic flux and output an electrical signal responding to …
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H02K11/25. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 15 2023 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).