Rotary machine with winding having multiple conductive films

Patent metadata

Field	Value
Publication number	US-12316163-B2
Application number	US-202217901942-A
Country	US
Kind code	B2
Filing date	Sep 2, 2022
Priority date	Sep 7, 2021
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A plurality of conductive films are arranged so that their thickness directions intersect with respect to a direction of a magnetic flux generated from a plurality of magnetic poles. Each of the plurality of conductive films is configured so that a conductivity in a longitudinal direction is larger than a conductivity in a thickness direction, and a conductivity in a longitudinal direction is larger than a conductivity in a width direction.

First claim

What is claimed is:

1. A rotary machine comprising:
a rotor having a plurality of magnetic poles arranged in a circumferential direction around an axis and rotatably arranged around the axis; and
a stator coil having a multi-phase winding in which an electric wire is wound for each phase, and which is arranged in a circumferential direction,
wherein
when the rotor rotates about the axis, magnetic fluxes generated from the plurality of magnetic poles generate a current in the multi-phase windings, and when a current flows through the multi-phase windings, a rotating magnetic field generated from the multi-phase windings generates a rotational force on the plurality of magnetic poles of the rotor,
when a direction in which each of the multi-phase windings extends is defined as a longitudinal direction, one of the multi-phase windings has a plurality of conductive films extending in the longitudinal direction,
when a direction of intersecting the longitudinal direction and forming a thickness of each of the plurality of conductive films is defined as a thickness direction, the plurality of conductive films are arranged in a state of being laminated in the thickness direction,
the one winding is arranged so that a direction of magnetic flux generated from at least one of the plurality of magnetic poles intersect in the thickness direction,
when a direction intersecting in the thickness direction and intersecting in the longitudinal direction is defined as a width direction,
in each of the plurality of conductive films, a conductivity in the thickness direction is smaller than a conductivity in the longitudinal direction, and a conductivity in the width direction is smaller than the conductivity in the longitudinal direction,
each of the plurality of conductive films has a plurality of carbon nanotubes,
the plurality of conductive films have a first conductive film, a second conductive film, and a third conductive film, and the second conductive film is arranged between the first conductive film and the third conductive film, and
in the first conductive film and the third conductive film, more carbon nanotubes among the plurality of carbon nanotubes are arranged along the longitudinal direction in a distribution in a direction in which the plurality of carbon nanotubes extend, as compared with in the second conductive film.

2. The rotary machine according to claim 1 , wherein
each of the plurality of conductive films has carbon.

3. The rotary machine according to claim 1 , wherein
each of the plurality of carbon nanotubes is arranged along the longitudinal direction.

4. The rotary machine according to claim 1 , wherein
each of the plurality of conductive films is made of a metal material.

5. The rotary machine according to claim 1 , wherein
each of the plurality of conductive films has the first conductive film and the second conductive film adjacent to each other,
on one side in the thickness direction of the conductive film of one of the first conductive film and the second conductive film, a convex portion that is convex on one side in the thickness direction and a concave portion that is recessed on the other side in the thickness direction are provided, and
a tip of the convex portion is in contact with the other conductive film and a gap is formed between the concave portion and the other conductive film.

6. The rotary machine according to claim 1 , wherein
the one winding has a plurality of insulating layers formed in a film shape by an electrically insulating material, and
the plurality of insulating layers are alternately arranged one by one with respect to the plurality of conductive films in the thickness direction.

7. The rotary machine according to claim 6 , wherein
the electrically insulating material is a resin material.

8. The rotary machine according to claim 6 , wherein
each of the plurality of insulating layers is film having flexibility.

Assignees

• Denso Corp

Inventors

• Awano Naomi
• Naruse Junichi
• Suzuki Hironari

Classifications

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K1/2753

  the rotor consisting of magnets or groups of magnets arranged with alternating polarity · CPC title

• H02K1/02

  characterised by the magnetic material · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K1/276

  Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] · CPC title