Rotary electric machine and vehicle
US-2018183289-A1 · Jun 28, 2018 · US
Motor
US11682936B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11682936-B2 |
| Application number | US-202117517169-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 2, 2021 |
| Priority date | Nov 4, 2020 |
| Publication date | Jun 20, 2023 |
| Grant date | Jun 20, 2023 |
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- Title
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Abstract
Official abstract text for this publication.
Provided is a motor capable of suppressing reduction of the torque of the motor even if the amount of use of the permanent magnets embedded in the rotor core is reduced. A motor includes a rotor with permanent magnets embedded in a rotor core, and a stator positioned on an outer circumference of the rotor. The rotor includes magnetic poles formed around a rotation axis of the rotor, the magnetic poles having the permanent magnets arranged therein. The permanent magnets in adjacent magnetic poles are arranged such that positions of a north pole and a south pole of the permanent magnet in one magnetic pole are inverted from those of the permanent magnet in a magnetic pole adjacent to the one magnetic pole. The permanent magnets each have a residual magnetization that decreases as it moves from the north pole toward the south pole.
First claim
Opening claim text (preview).
What is claimed is: 1. A motor comprising: a rotor with a plurality of permanent magnets embedded in a rotor core; and a stator positioned on an outer circumference of the rotor, wherein: the rotor includes a plurality of magnetic poles formed around a rotation axis of the rotor, the magnetic poles having the permanent magnets arranged therein, the permanent magnets in adjacent magnetic poles are arranged such that positions of a north pole and a south pole of the permanent magnet in one magnetic pole are inverted from those of the permanent magnet in a magnetic pole adjacent to the one magnetic pole, and the permanent magnets each have a residual magnetization that decreases as it moves from the north pole toward the south pole. 2. The motor according to claim 1 , wherein a volume density of the permanent magnet decreases as it moves from the north pole toward the south pole. 3. The motor according to claim 1 , wherein the permanent magnet is obtained by stacking a plurality of magnetic layers from the north pole to the south pole, and the magnetic layer close to the north pole has a larger residual magnetization than that of the magnetic layer close to the south pole. 4. The motor according to claim 3 , wherein in the permanent magnet, a volume density the magnetic layer close to the north pole is larger than a volume density of the magnetic layer close to the south pole.
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Frequently asked questions
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- What does patent US11682936B2 cover?
- Provided is a motor capable of suppressing reduction of the torque of the motor even if the amount of use of the permanent magnets embedded in the rotor core is reduced. A motor includes a rotor with permanent magnets embedded in a rotor core, and a stator positioned on an outer circumference of the rotor. The rotor includes magnetic poles formed around a rotation axis of the rotor, the magneti…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02K1/276. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 20 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).