ROTATING ELECTRIC MACHINE

• US 20090184592A1
• Filed: 01/08/2009
• Published: 07/23/2009
• Est. Priority Date: 01/17/2008
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Sano, Shinya, Tatematsu, Kazutaka, Sonohara, Tomoka, Arakawa, Atomi
• Application Number:
  US12/350,399
• Publication Number:
  US 20090184592A1
• Time in Patent Office: Days
• US Class Current: 310/59
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

A rotating electric machine is provided that includes a rotating portion including a rotating shaft, a housing enclosing at least a part of the rotating shaft, and a stator coil accommodated in the housing. A static coolant supply portion supplies coolant to the stator coil from the outside of the stator coil in a radial direction of the rotating shaft. A rotating coolant supply portion supplies coolant to the stator coil from the inside of the stator coil in the radial direction of the rotating shaft. A guide portion is provided in the housing and extends toward the inner surface of the stator coil in the radial direction of the rotating shaft. The guide portion has a through hole through which coolant flows.

Claims

1. A rotating electric machine comprising:

a rotating portion including a rotating shaft;

a housing enclosing at least a part of the rotating shaft;

a stator coil accommodated in the housing;

a static coolant supply portion that supplies coolant to the stator coil from the outside of the stator coil in a radial direction of the rotating shaft;

a rotating coolant supply portion that supplies coolant to the stator coil from the inside of the stator coil in the radial direction of the rotating shaft; and

a guide portion that is provided in the housing and extends toward an inner surface of the stator coil in the radial direction of the rotating shaft, wherein the guide portion has a through hole through which coolant flows.

2. The rotating electric machine according to claim 1, further comprising:

a rotor core that is fixed to the rotating shaft; and

an end plate that faces an axial end surface of the rotor core,

wherein a coolant passage is formed between the end plate and the axial end surface of the rotor core, and coolant is supplied to the stator coil through the coolant passage.

3. The rotating electric machine according to claim 1, further comprising a bearing that is provided on the housing and supports the rotating shaft to be rotatable with respect to the housing,

wherein coolant is supplied to the stator coil via the bearing.

4. The rotating electric machine according to claim 1, wherein the guide member is provided above the rotating shaft.

5. The rotating electric machine according to claim 4, wherein the guide member includes a curved portion that is curved inward in the radial direction of the rotating shaft such that a portion of the guide member is positioned lower, as the portion approaches the stator coil in the axial direction of the rotating shaft.

6. The rotating electric machine according to claim 1, wherein at least a portion of the coolant supplied from the rotating coolant supply portion reaches the inner surface of the stator coil via the through hole formed in the guide member.

7. The rotating electric machine according to claim 1, wherein the static coolant supply portion includes a coolant supply hole formed in the housing at the position above the stator coil.

8. The rotating electric machine according to claim 2, wherein the rotating coolant supply portion includes an in-shaft coolant passage provided in the rotating shaft, and the in-shaft coolant passage communicates with the coolant passage between the end plate and the axial end surface of the rotor core.

9. The rotating electric machine according to claim 1, wherein the guide member is attached on an inner surface of the housing.

10. The rotating electric machine according to claim 1, wherein the guide member is attached on an axial end surface of a stator core of the stator coil.

11. The rotating electric machine according to claim 9, wherein a gap is formed between the guide member and a stator core of the stator coil, and at least a portion of the coolant supplied from the rotating coolant supply portion reaches the inner surface of the stator core via the gap.

12. The rotating electric machine according to claim 10, wherein a gap is formed between the guide member and the housing, and at least a portion of the coolant supplied from the rotating coolant supply portion reaches the inner surface of the stator coil via the gap.

13. The rotating electric machine according to claim 3, wherein the coolant supplied via the bearing is lubricant that lubricates the bearing.