Variable-field rotary electric machine and vehicle provided with same

Patent metadata

Field	Value
Publication number	US-10693356-B2
Application number	US-201916266321-A
Country	US
Kind code	B2
Filing date	Feb 4, 2019
Priority date	Feb 7, 2018
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

The variable-field rotary electric machine includes: a rotor that is rotatably integrated with a shaft while an axis of the shaft is used as a rotation axis and includes a movable iron core and a displacement mechanism configured to displace the movable iron core in an axial direction of the rotation shaft. The displacement mechanism includes: a cylinder unit including a cylinder chamber to retain hydraulic fluid according to a rotor speed, a piston member connected to the movable iron core, and a sealer member provided at the piston member. The the piston member and the movable iron core are displaced in the axial direction of the rotation shaft in response to an increase or decrease in an amount of the hydraulic fluid in the cylinder chamber.

First claim

The invention claimed is:

1. A variable-field rotary electric machine comprising:
a rotor that is rotatably integrated with a shaft while an axis of the shaft is used as a rotation axis and includes a movable iron core, and
a displacement mechanism configured to displace the movable iron core in an axial direction of the rotation shaft,
wherein the displacement mechanism comprises:
a cylinder unit comprising a cylinder chamber, a piston member,
and a sealer member,
the cylinder chamber configured to retain hydraulic fluid in accordance with a rotation speed of the rotor,
the piston member connected to the movable iron core at one end portion in an axial direction of the movable iron core and provided so as to be able to be displaced along an axis of the cylinder chamber,
the sealer member provided at the piston member,

wherein the piston member is displaced in the axial direction of the rotation shaft in response to an increase or decrease in a retention amount of the hydraulic fluid in the cylinder chamber, so that the movable iron core connected to the piston member is displaced in the axial direction of the rotation shaft.

2. The variable-field rotary electric machine according to claim 1 , further comprising a stator core and a coil end,
wherein the cylinder unit is arranged on an inner-diameter side of the coil end.

3. The variable-field rotary electric machine according to claim 1 , wherein the hydraulic fluid that has been supplied to the cylinder chamber is retained only in a space between an outer circumference surface of the movable iron core and an inner wall of the cylinder chamber on an outer-diameter side.

4. The variable-field rotary electric machine according to claim 1 , further comprising a biasing unit configured such that after the piston member is displaced on one side in the axial direction of the rotation shaft, the piston member is pushed and returned to the other side opposite to the one side.

5. The variable-field rotary electric machine according to claim 1 , further comprising a hydraulic fluid-discharging means for discharging the hydraulic fluid from the cylinder chamber to an outside of the cylinder chamber.

6. The variable-field rotary electric machine according to claim 1 , wherein the sealer member is arranged on an outer-diameter side of the piston member, is arranged in substantially parallel to an outer circumference portion of the rotor, and has an annular continuous form.

7. The variable-field rotary electric machine according to claim 1 , wherein the sealer member comprises a first piston gasket that is arranged on an outer-diameter side of the piston member and a second piston gasket that is arranged on an inner-diameter side of the piston member; and
the first piston gasket and the second piston gasket are arranged in substantially parallel to an outer circumference portion of the rotor and each have an annular continuous form.

8. A vehicle comprising the variable-field rotary electric machine according to claim 1 .

Assignees

• Honda Motor Co Ltd

Inventors

• Miura Kazuha
• Kubota Yoshihisa

Classifications

• H02K9/19

  for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title

• H02K1/2766

  having a flux concentration effect · CPC title

• H02K1/246

  Variable reluctance rotors · CPC title

• H02K1/276

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

• H02K7/006 Primary

  Structural association of a motor or generator with the drive train of a motor vehicle · CPC title