Rotating electric machine

Patent metadata

Field	Value
Publication number	US-2020366175-A1
Application number	US-202016849276-A
Country	US
Kind code	A1
Filing date	Apr 15, 2020
Priority date	May 13, 2019
Publication date	Nov 19, 2020
Grant date	—

Abstract

A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.

First claim

1 . A rotating electric machine comprising:
a non-rotating member; a stator fixed to the non-rotating member; a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core; and a rotor rotatably disposed between the stator and the field coil, wherein the rotor includes a first rotor portion and a second rotor portion respectively arranged along an extending direction of a rotary shaft of the rotor, the first rotor portion includes:
a first annular portion extending in a circumferential direction with respect to the rotary shaft of the rotor; and
a first extending portion extending from the first annular portion in the extending direction,
the second rotor portion includes:
a second annular portion extending in the circumferential direction and disposed with a first gap with respect to the first extending portion in the extending direction; and
a second extending portion extending from the second annular portion in the extending direction, disposed with a second gap with respect to the first extending portion in the circumferential direction, and disposed with a third gap with respect to the first annular portion in the extending direction, and
the rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.

2 . The rotating electric machine according to claim 1 , wherein the positioning member is made of a permanent magnet or a non-magnetic material.

3 . The rotating electric machine according to claim 2 , wherein
the positioning member includes a first positioning member made of a permanent magnet, and a second positioning member made of a non-magnetic material, and the second positioning member is disposed in each of the first gap and the third gap, and the first positioning member is disposed in the second gap.

4 . The rotating electric machine according to claim 1 , wherein
the first rotor portion includes a first protruding portion protruding from the first extending portion in a radial direction with respect to the rotary shaft of the rotor, and a first locking portion extending in the circumferential direction from a tip of the first protruding portion in the radial direction, the second rotor portion includes a second protruding portion protruding from the second extending portion in the radial direction, and a second locking portion extending in the circumferential direction from a tip of the second protruding portion in the radial direction, and the positioning member includes a positioning ring, which is disposed inside or outside in the radial direction of the first extending portion and the second extending portion, having a first groove portion on which the first protruding portion is disposed and a second groove portion on which the second protruding portion is disposed, the first groove portion extending along the extending direction from a first end in the extending direction to a second end in the extending direction, the second groove portion extending along the extending direction from the second end to the first end, and the first groove portion and the second groove portion being provided at different positions in the circumferential direction.

5 . A rotating electric machine comprising:
a non-rotating member; a stator fixed to the non-rotating member; a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core; and a rotor rotatably disposed between the stator and the field coil, wherein the rotor includes a first rotor portion and a second rotor portion respectively arranged along an extending direction of a rotary shaft of the rotor, the first rotor portion includes:
a first annular portion extending in a circumferential direction with respect to the rotary shaft of the rotor; and
a first extending portion extending from the first annular portion in the extending direction,
the second rotor portion includes:
a second annular portion extending in the circumferential direction and disposed with a first gap with respect to the first extending portion in the extending direction; and
a second extending portion extending from the second annular portion in the extending direction, disposed with a second gap with respect to the first extending portion in the circumferential direction, and disposed with a third gap with respect to the first annular portion in the extending direction,
the rotating electric machine further comprises a positioning member that positions each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction, the first rotor portion includes a first protruding portion protruding from the first extending portion in a radial direction with respect to the rotary shaft of the rotor, and a first locking portion extending in the circumferential direction from a tip of the first protruding portion in the radial direction, the second rotor portion includes a second protruding portion protruding from the second extending portion in the radial direction, and a second locking portion extending in the circumferential direction from a tip of the second protruding portion in the radial direction, and the positioning member includes a positioning ring, which is disposed inside or outside in the radial direction of the first extending portion and the second extending portion, having a first groove portion on which the first protruding portion is disposed and a second groove portion on which the second protruding portion is disposed, the first groove portion extending along the extending direction from a first end in the extending direction to a second end in the extending direction, the second groove portion extending along the extending direction from the second end to the first end, and the first groove portion and the second groove portion being provided at different positions in the circumferential direction.

6 . A rotating electric machine comprising:
a non-rotating member; a stator fixed to the non-rotating member; a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core; and a rotor rotatably disposed between the stator and the field coil, wherein the rotor includes a first rotor portion and a second rotor portion respectively arranged along an extending direction of a rotary shaft of the rotor, the first rotor portion includes:
a first annular portion extending in a circumferential direction with respect to the rotary shaft of the rotor;
a first connecting portion extending from the first annular portion in a radial direction with respect to the rotary shaft of the rotor; and
a first extending portion extending from the first connecting portion in the extending direction and disposed at an interval from the first annular portion in the radial direction,
the rotating electric machine further comprises a non-magnetic material positioning member that is disposed inside or outside in the radial direction of the first extending portion and positions the first rotor portion in the circumferential direction and the extending direction, the positioning member includes:
a main body having a first groove portion; and
a connection shaft portion which extends along the extending direction from a one end of the main body in the extending direction in a direction away from the main body and to which a rotating member is connected, and
the first groove portion ex

Assignees

• Exedy Corp

Inventors

• Katsura Hitoshi
• Kitamura Taichi
• Kitada Kenji

Classifications

• H02K5/203

  specially adapted for liquids, e.g. cooling jackets · CPC title

• H02K16/02 Primary

  Machines with one stator and two {or more} rotors · CPC title

• H02K1/243

  of the claw-pole type · CPC title

• H02K19/16

  Synchronous generators · CPC title

• H02K19/10

  for multi-phase current · CPC title