Stator for Rotating Electric Machine

• US 20180294686A1
• Filed: 04/27/2016
• Published: 10/11/2018
• Est. Priority Date: 05/22/2015
• Status: Abandoned Application

• Current Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: SAWADA, Itsurou, MATSUNOBU, Yutaka, NAKAHARA, Akihito
• Application Number:
  US15/573,878
• Publication Number:
  US 20180294686A1
• Time in Patent Office: Days
• CPC Class Codes: H02K 1/16 Stator cores with slots for windings
• CPC Class Codes: H02K 1/165 Shape, form or location of the slots
• CPC Class Codes: H02K 3/04 Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• CPC Class Codes: H02K 3/48 in slots
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets

Abstract

The present invention provides a stator for a rotating electric machine that has a high efficiency and an excellent cooling performance. The stator of the present invention, includes: a stator iron core having a plurality of slots; and coil windings made by connecting segment conductors and disposed in the slots, in which each slot contains two or more of the coil windings electrically connected in parallel and at least one of the coil windings electrically connected in series with the coil windings connected in parallel.

Claims

1. A stator, comprising:

a stator iron core having a plurality of slots; and

coil windings made by connecting segment conductors and disposed in the slots,

wherein each slot contains two or more of the coil windings electrically connected in parallel and at least one of the coil windings electrically connected in series with the coil windings connected in parallel.

2. The stator according to claim 1, wherein the coil windings in the slots have generally the same cross-sectional shape.

3. The stator according to claim 1, wherein the coil windings connected in parallel are disposed nearer to the inner circumference of the stator than the other coil windings in each slot.

4. The stator according to claim 1, wherein the coil windings are wound in a wave winding manner.

5. A rotating electric machine, comprising:

the stator according to claim 1; and

a rotor rotatably held with a predetermined gap from the stator.

6. The rotating electric machine according to claim 5, wherein the rotating electric machine is for driving an electric vehicle.

7. The rotating electric machine according to claim 5, wherein the stator is cooled by a liquid-cooled jacket disposed near the outer circumference of the stator.

8. An electric vehicle, comprising:

the rotating electric machine according to claim 5,

wherein the rotating electric machine is for driving a rear wheel of the electric vehicle.