Rotating electric machine

Patent metadata

Field	Value
Publication number	US-11588359-B2
Application number	US-202117196182-A
Country	US
Kind code	B2
Filing date	Mar 9, 2021
Priority date	Sep 17, 2020
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

A rotating electric machine according to embodiments is a rotating electric machine including a rotor including a first core and being capable of rotating around a rotating shaft; and a stator disposed to face the rotor in the axial direction of the rotating shaft, the first core including a first pressed powder material having a plurality of first flaky magnetic metal particles and a first intercalated phase, the first flaky magnetic metal particles having an average thickness of from 10 nm to 100 μm, each first flaky magnetic metal particle having a first flat surface and a first magnetic metal phase including at least one first element selected from the group consisting of Fe, Co, and Ni, the average value of the ratio of the average length in the first flat surface with respect to the average thickness being from 5 to 10,000, the first intercalated phase existing between the first flaky magnetic metal particles and including at least one second element selected from the group consisting of oxygen (O), carbon (C), nitrogen (N), and fluorine (F), wherein in the first pressed powder material, the first flat surfaces are oriented approximately in parallel with a first principal plane of the first pressed powder material and have the difference in magnetic permeability on the basis of direction within the first principal plane, and the first principal plane of the first pressed powder material is disposed to be approximately perpendicular to the radial direction of the rotating electric machine.

First claim

What is claimed is:

1. A rotating electric machine comprising a rotor including a first core and being capable of rotating around a rotating shaft; and a stator disposed to face the rotor in the axial direction of the rotating shaft,
the first core including a first pressed powder material having a plurality of first flaky magnetic metal particles and a first intercalated phase,
the first flaky magnetic metal particles having an average thickness of from 10 nm to 100 μm, each first flaky magnetic metal particle having a first flat surface and a first magnetic metal phase including at least one first element selected from the group consisting of Fe, Co, and Ni, the average value of the ratio of the average length in the first flat surface with respect to the average thickness being from 5 to 10,000,
the first intercalated phase existing between the first flaky magnetic metal particles and including at least one second element selected from the group consisting of oxygen (O), carbon (C), nitrogen (N), and fluorine (F),
wherein in the first pressed powder material, the first flat surfaces are oriented approximately in parallel with a first principal plane of the first pressed powder material and have the difference in magnetic permeability on the basis of direction within the first principal plane, and
the first principal plane of the first pressed powder material is disposed to be approximately perpendicular to the radial direction of the rotating electric machine.

2. The rotating electric machine according to claim 1 , wherein in the first pressed powder material, the first flaky magnetic metal particles have the directions having the highest magnetic permeability within the first flat surface aligned in a predetermined single direction.

3. The rotating electric machine according to claim 1 , wherein in the first flaky magnetic metal particles, the directions having the highest magnetic permeability within the first flat surface are formed along a predetermined curve by sequentially changing the angle with respect to the axial direction of the rotating electric machine.

4. A rotating electric machine comprising a rotor capable of rotating around a rotating shaft; and a stator disposed to face the rotor in the axial direction of the rotating shaft and including a second core and coils wound around the second core,
the second core including a second pressed powder material having a plurality of second flaky magnetic metal particles and a second intercalated phase,
the second flaky magnetic metal particles having an average thickness of from 10 nm to 100 μm, each second flaky magnetic metal particle having a second flat surface and a second magnetic metal phase including at least one first element selected from the group consisting of Fe, Co, and Ni, the average value of the ratio of the average length in the second flat surface with respect to the average thickness being from 5 to 10,000,
the second intercalated phase existing between the second flaky magnetic metal particles and including at least one second element selected from the group consisting of O, C, N, and F,
wherein in the second pressed powder material, the second flat surfaces are oriented approximately in parallel with a second principal plane of the second pressed powder material and have the difference in magnetic permeability on the basis of direction within the second principal plane, and
the second principal plane of the second pressed powder material is disposed to be approximately perpendicular to the radial direction of the rotating electric machine.

5. The rotating electric machine according to claim 4 , wherein in the second pressed powder material, the second flaky magnetic metal particles have the directions having the highest magnetic permeability within the second flat surface aligned in a predetermined single direction.

6. The rotating electric machine according to claim 4 , wherein in the second flaky magnetic metal particles, the directions having the highest magnetic permeability within the second flat surface are formed along a predetermined curve by sequentially changing the angle with respect to the axial direction of the rotating electric machine.

7. A rotating electric machine comprising a rotor capable of rotating around a rotating shaft, the rotor having an annular-shaped first coil wound along the rotational direction of the rotor and first cores provided around at least a portion of the first coil; a stator disposed to face the rotor,
the first core including a first pressed powder material having a plurality of first flaky magnetic metal particles and a first intercalated phase,
the first flaky magnetic metal particles having an average thickness of from 10 nm to 100 μm, each first flaky magnetic metal particle having a first flat surface and a first magnetic metal phase including at least one first element selected from the group consisting of Fe, Co, and Ni, the average value of the ratio of the average length in the first flat surface with respect to the average thickness being from 5 to 10,000,
the first intercalated phase existing between the first flaky magnetic metal particles and including at least one second element selected from the group consisting of O, C, N, and F,
wherein in the first pressed powder material, the first flat surfaces are oriented approximately in parallel with a first principal plane of the first pressed powder material and have the difference in magnetic permeability on the basis of direction within the first principal plane, and
the first principal plane of the first pressed powder material is disposed to be approximately perpendicular to the winding direction of the first coil.

8. The rotating electric machine according to claim 7 , wherein in the first pressed powder material, the second flaky magnetic metal particles have the directions having the highest magnetic permeability within the first flat surface aligned in a predetermined single direction.

9. The rotating electric machine according to claim 7 , wherein in the first flaky magnetic metal particles, the directions having the highest magnetic permeability within the first flat surface are formed along a predetermined curve by sequentially changing the angle with respect to the axial direction of the rotating electric machine.

10. A rotating electric machine comprising a rotor capable of rotating around a rotating shaft; a stator disposed to face the rotor and having an annular-shaped second coil wound along the rotational direction of the rotor and a second core provided around at least a portion of the second coil,
the second core including a second pressed powder material having a plurality of second flaky magnetic metal particles and a second intercalated phase,
the second flaky magnetic metal particles having an average thickness of from 10 nm to 100 μm, each second flaky magnetic metal particle having a second flat surface and a second magnetic metal phase including at least one first element selected from the group consisting of Fe, Co, and Ni, the average value of the ratio of the average length in the second flat surface with respect to the average thickness being from 5 to 10,000,
the second intercalated phase existing between the second flaky magnetic metal particles and including at least one second element selected from the group consisting of O, C, N, and F,
wherein in the second pressed powder material, the second flat surfaces are oriented approximately in parallel with a second principal plane of the second pressed powder material and have the difference in magnetic permeability on the basis of direction within the second principal plane, and
the second principal plane of the second pressed powder material is dispo

Assignees

• Toshiba Kk

Inventors

• Kinouchi Hiroaki
• Suetsuna Tomohiro
• Sanada Naoyuki
• Hagiwara Masaya

Classifications

• H02K1/2793

  Rotors axially facing stators · CPC title

• H02K21/145

  having an annular armature coil (with homopolar co-operation H02K21/20) · CPC title

• H02K1/02 Primary

  characterised by the magnetic material · CPC title

• H01F1/0556

  pressed · CPC title

• C22C33/00

  Making ferrous alloys · CPC title