Rotating electrical machine apparatus

Patent metadata

Field	Value
Publication number	US-10840769-B2
Application number	US-201916592289-A
Country	US
Kind code	B2
Filing date	Oct 3, 2019
Priority date	Dec 24, 2014
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

In a rotating electrical machine apparatus, a rotor portion provided in a cylindrical portion and a stator portion provided in a recessed portion in which the rotor portion is housed are aligned along the rotation axis of a rim such that a force is generated in a direction opposite to the direction of a load that acts along the rotation axis of the rim of loads that act on the rim following rotation of a blade.

First claim

What is claimed is:

1. A rotating electrical machine apparatus comprising:
a cylindrical duct including a stator portion, the cylindrical duct being provided with a recessed portion recessed radially outwardly from an inner surface of the cylindrical duct; and
a rim arranged to be rotatable and disposed in a radial inward direction of the cylindrical duct, the rim including
a cylindrical portion,
a blade protruding in a radial inward direction of the cylindrical portion from an inner surface of the cylindrical portion, the blade being configured so that following rotation of the blade, a first load acts on the rim along a rotation axis of the rim, and
a rotor portion attached to the cylindrical portion and housed in the recessed portion, the rotor portion being provided to face the stator portion along the rotation axis of the rim, the rotor portion and the stator portion being aligned along the rotation axis of the rim and controlled to generate a force in a direction opposite to a direction of the first load, wherein
a second load acts in a first direction along the rotation axis of the rim,
the rotor portion and the stator portion are arranged and controlled such that a suction force formed between the rotor portion and the stator portion acts in a second direction opposite to the first direction along the rotation axis of the rim,
the rotating electrical machine apparatus includes a generator including the cylindrical duct and the rim, the generator generates electric power by rotating the blade according to a flow of an external fluid, and
the flow of the external fluid causes the second load to act in the first direction along the rotation axis on the rim.

2. The rotating electrical machine apparatus according to claim 1 , wherein
the rotor portion includes a permanent magnet,
the rotating electrical machine apparatus further comprises a suction member provided opposite the recessed portion and separately from the stator portion so as to face the rotor portion of the rim along the rotation axis, and
a suction force is generated between the permanent magnet of the rotor portion and the suction member.

3. The rotating electrical machine apparatus according to claim 2 , wherein the suction member is positioned farther in the second direction than the rotor portion.

4. The rotating electrical machine apparatus according to claim 2 , wherein the suction member is made of an iron material.

5. The rotating electrical machine apparatus according to claim 1 , wherein the stator portion is positioned farther in the second direction than the rotor portion.

6. The rotating electrical machine apparatus according to claim 1 , wherein the stator portion includes a first stator portion positioned farther in the second direction than the rotor portion and a second stator portion positioned farther in the first direction than the rotor portion.

7. The rotating electrical machine apparatus according to claim 6 , wherein a magnitude of a first suction force generated between the first stator portion and the rotor portion is different from a magnitude of a second suction force generated between the second stator portion and the rotor portion.

8. The rotating electrical machine apparatus according to claim 6 , further comprising a controller that adjusts a power generation amount assigned to the first stator portion and the second stator portion.

9. The rotating electrical machine apparatus according to claim 1 , wherein the blade has a wing shape.

10. The rotating electrical machine apparatus according to claim 1 , wherein the rotating electrical machine apparatus is mounted as a generation device on a boat body.

11. The rotating electrical machine apparatus according to claim 10 , wherein the rotating electrical machine apparatus is mounted on the boat body through a bracket.

12. The rotating electrical machine apparatus according to claim 1 , wherein the cylindrical duct is rotatable about a turning axis that intersects with the rotation axis of the rim.

13. The rotating electrical machine apparatus according to claim 1 , wherein a sectional shape of the cylindrical duct changes along the rotation axis of the rim.

14. The rotating electrical machine apparatus according to claim 1 , wherein the blade includes at least three and not more than eight blades.

15. The rotating electrical machine apparatus according to claim 1 , further comprising a recessed portion for the rim that is configured to house the cylindrical portion of the rim.

16. The rotating electrical machine apparatus according to claim 15 , wherein the recessed portion for the rim is disposed radially inward from the recessed portion that houses the rotor portion.

17. The rotating electrical machine apparatus according to claim 1 , wherein a forward portion of the cylindrical duct has an inclined or curved surface that is inclined or curved toward the cylindrical portion of the rim.

18. The rotating electrical machine apparatus according to claim 17 , wherein a forward portion of the cylindrical portion of the rim has an inclined or curved surface that aligns with the inclined or curved surface of the forward portion of the cylindrical duct.

19. The rotating electrical machine apparatus according to claim 1 , wherein the recessed portion of the cylindrical duct has a vertical portion and a lateral portion, the vertical portion being configured to house the rotor portion of the rim, and the lateral portion being configured to house the cylindrical portion of the rim.

20. The rotating electrical machine apparatus according to claim 1 , further comprising a liquid bearing that rotatably supports the rim, wherein the liquid bearing is arranged circumferentially along the cylindrical duct.

Assignees

• Yamaha Motor Co Ltd

Inventors

• Suzuki Takayoshi
• Matsuo Ryoma
• Ishikawa Satoshi
• Hiraoka Noriyoshi

Classifications

• B63H2023/005

  using a drive acting on the periphery of a rotating propulsive element, e.g. on a dented circumferential ring on a propeller, or a propeller acting as rotor of an electric motor · CPC title

• Y02E10/20

  Hydro energy · CPC title

• F03B3/126

  Rotors for essentially axial flow, e.g. for propeller turbines (with adjustable blades F03B3/14) · CPC title

• F05B2220/20

  within closed fluid conduits, e.g. pipes · CPC title

• F04D13/086

  the pump and drive motor are both submerged · CPC title