Rotating electrical machine and coil

• US 20060066167A1
• Filed: 08/10/2005
• Published: 03/30/2006
• Est. Priority Date: 09/30/2004
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Yasuhara, Takashi, Saito, Yasuyuki, Kobayashi, Hidemitsu
• Granted Patent: US 7,569,966 B2
• Time in Patent Office: Days
• US Class Current: 310/201
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y10T 29/49073 by assembling coil and core

Abstract

A stator coil, being a rectangular coil, is wound on a salient pole, striding across a plurality of slots, while being inserted sequentially through the inlet of a predetermined slot of the stator core. The stator coil comprises two slot inserts and to be inserted into the slot; two coil ends and located outside the end of the slot; and four twist sections arranged between the slot inserts and coil ends, processed by twisting. In the twist sections, twisting is applied to ensure that the surface of the rectangular coil in the second coil end will be opposite to the surface of the rectangular coil in the first coil end. The start of winding of the rectangular coil and the end of winding of the same coil are located on the same surface. Thereby, a rotating electrical machine with the large internal dimensions without increasing the external dimensions can be permitted.

Claims

1. A rotating electrical machine comprising:

a stator with three phase stator coils wound on the salient poles of a stator core according to distributed winding method; and

a rotor, arranged inside said stator and supported rotatably, having a plurality of permanent magnets spaced at regular intervals arranged in the circumferential direction;

wherein the inlet of the slot of said stator core is narrower than the inner part, and each of said coils, being rectangular-coil, is wound on said salient pole, striding across a plurality of slots, while being inserted sequentially through the inlet of a predetermined slot of said stator core; and

comprises;

two slot inserts to be inserted into said slot;

two coil ends located outside the end of said slot; and

four twist sections, arranged between said slot inserts and coil ends, processed by twisting; and

wherein, while the coils equivalent to a plurality of turns are wound on said salient pole, twisting is provided by said twist sections to ensure that the surface of said rectangular coil in the second coil end will be opposite to the surface of said rectangular coil in the first coil end; and

said coil ends are configured in such a way that the start of the rectangular coil winding and the end of the rectangular coil winding are located on one and the same side.

2. The rotating electrical machine described in claim 1, wherein, in the formation of said stator coils, a plurality of rectangular coils are laminated to form a layer coil and an even number of layer coils are laminated in such a way that the number of coil layers in two slot inserts will be the same as each other, whereby said stator coils are formed by serial connection.

3. The rotating electrical machine described in claim 2, wherein an even number of layer coils are laminated in the radial direction of the rotating, electrical machine in the slot insert;

whereas, in the coil end, they are laminated in the axial direction of the rotating electrical machine.

4. An electrical winding used in said stator of a rotating electrical machine composed of a stator and rotor, wherein said electrical winding, being a rectangular coil, is wound on said salient pole, striding across a plurality of slots, while being inserted sequentially through the inlet of a predetermined slot of said stator core;

and comprises;

two slot inserts to be inserted into said slot;

two coil ends located outside the end of said slot; and

four twist sections, arranged between said slot inserts and coil ends, processed by twisting; and

wherein, while the coils equivalent to a plurality of turns are wound on said salient pole, twisting is provided by said twist sections to ensure that the surface of said rectangular coil in the second coil end will be opposite to the surface of said rectangular coil in the first coil end; and

said coil ends are configured in such a way that the start of the rectangular coil winding and the end of the rectangular coil winding are located on one and the same side.

5. A rotating electrical machine comprising:

a stator; and

a rotor, arranged inside the stator, rotatably shaft-supported through a gap on the peripheral surface of the stator;

wherein said stator further comprises;

a stator core; and

stator coils incorporated into the stator core;

wherein said stator core has a plurality of slots, provided continuously in the axial direction, formed in the circumferential direction; and

said stator coils being composed of a plurality of phase coils continuously wound thereon, and the coil conductors being laminated;

wherein each of said phase coils comprises;

two coil sides extending in the axial direction; and

two coil ends, displaced by the twist section from both ends of the coil sides, extending in the circumferential direction;

wherein said two coil sides are accommodated into said two slots, separated with other, striding across said slots;

wherein said two coil ends protruding in both axial directions from said slot are arranged on both ends of said stator core in the axial direction;

wherein, of said plurality of phase coils, a plurality of the first phase coils have the coil ends thereof arranged on both ends of the stator core in the axial direction so that the lamination direction of said coil conductors in said coil ends will be the same as the axial direction;

of said plurality of phase coils, a plurality of the second phase coils have the coil ends thereof arranged on both ends of the stator core in the axial direction so that the lamination direction of said coil conductors in said coil ends will be changed from the axial direction to the radial direction; and

the coil ends will stride across the adjacent twist sections of the first phase coils adjacent to each other in the circumferential direction, through the outside of the coil ends of the first phase coil; and

wherein, of said plurality of phase coils, a plurality of the third phase coils have the coil ends thereof arranged on both ends of the stator core in the axial direction so that the lamination direction of said coil conductors in said coil ends will be the same as the axial direction; and

the coil ends will stride across the adjacent twist sections of the first and second phase coils adjacent to each other in the circumferential direction, through the outside of the coil ends of the first and second phase coils.

6. The rotating electrical machine described in claim 5, wherein each of said phase coils is characterized in that the thickness of the laminated coil conductors in the coil end is smaller than the thickness of said laminated coil conductors in the coil side.

7. The rotating electrical machine described in claim 5, wherein each of phase coils is twisted by the twist section in such a way that said coil conductors will be laminated on the surface of the coil conductor in one of said coil ends, and on the reversed surface of the coil conductor in the other of the coil ends.

8. The rotating electrical machine described in claim 5, wherein each of phase coils is twisted by the twist section in such a way that the direction of laminating the coil conductors in one of said coil ends is from top to bottom;

whereas, in the other of said coil ends, the direction is from bottom to top.

9. The rotating electrical machine described in claim 8, wherein each of said phase coils is characterized in that the start of the coil conductor winding is formed on one of the coil ends, and the end of the coil conductor winding is formed on the other of the coil ends;

wherein the start and end of winding are located on the upper layer of the laminate created by lamination of said coil conductors.

10. A rotating electrical machine, for providing a drive source for generating the drive force of a vehicle together with an internal combustion engine, arranged between a transmission for changing the drive force of the drive source and transmitting it to an axle, and the internal combustion engine;

comprising;

a stator; and

a rotor, arranged inside the stator, rotatably shaft-supported through a gap on the peripheral surface of the stator;

wherein said stator further comprises;

a stator core; and

stator coils incorporated into the stator core;

wherein said stator core has a plurality of slots, provided continuously in the axial direction, formed in the circumferential direction;

said stator coils being composed of a plurality of phase coils continuously wound thereon, and the coil conductors being laminated;

wherein each of said phase coils comprises;

two coil sides extending in the axial direction; and

two coil ends, displaced by the twist section from both ends of the coil sides, extending in the circumferential direction;

wherein said two coil sides are accommodated into said two slots, separated with other, striding across said slots;

wherein said two coil ends protruding in both axial directions from said slot are arranged on both ends of said stator core in the axial direction;

wherein, of said plurality of phase coils, a plurality of the first phase coils have the coil ends thereof arranged on both ends of the stator core in the axial direction so that the lamination direction of said coil conductors in said coil ends will be the same as the axial direction;

of said plurality of phase coils, a plurality of the second phase coils have the coil ends thereof arranged on both ends of the stator core in the axial direction so that the lamination direction of said coil conductors in said coil ends will be changed from the axial direction to the radial direction; and

the coil ends will stride across the adjacent twist sections of the first phase coils adjacent to each other in the circumferential direction, through the outside of the coil ends of the first phase coil; and

wherein, of said plurality of phase coils, a plurality of the third phase coils have the coil ends thereof arranged on both ends of the stator core in the axial direction so that the lamination direction of said coil conductors in said coil ends will be the same as the radial direction; and

the coil ends will stride across the adjacent twist sections of the first and second phase coils adjacent to each other in the circumferential direction, through the outside of the coil ends of the first and second phase coils.

11. The rotating electrical machine described in claim 10, wherein each of said phase coils is characterized in that the thickness of the laminated coil conductors in the coil end is smaller than the thickness of said laminated coil conductors in the coil side.

12. The rotating electrical machine described in claim 10, wherein each of phase coils is twisted by the twist section in such a way that said coil conductors will be laminated on the surface of the coil conductor in one of said coil ends, and on the reversed surface of the coil conductor in the other of the coil ends.

13. The rotating electrical machine described in claim 10, wherein each of phase coils is twisted by the twist section in such a way that the direction of laminating the coil conductors in one of said coil ends is from top to bottom;

whereas, in the other of said coil ends, the direction is from bottom to top.

14. The rotating electrical machine described in claim 13, wherein each of said phase coils is characterized in that the start of the coil conductor winding is formed on one of the coil ends, and the end of the coil conductor winding is formed on the other of the coil ends;

wherein the start and end of winding are located on the upper layer of the laminate created by lamination of said coil conductors.

15. A rotating electrical machine, for providing a drive source for generating the drive force of a vehicle together with an internal combustion engine, arranged between a transmission for changing the drive force of the drive source and transmitting it to an axle, and the internal combustion engine;

said rotating electrical machine comprising;

a stator with three phase stator coils wound on the salient poles of a stator core according to distributed winding method; and

a rotor, arranged inside said stator and supported rotatably, having a plurality of permanent magnets spaced at regular intervals arranged in the circumferential direction;

wherein the inlet of the slot of said stator core is narrower than the inner part, and each of said coils, being a rectangular coil, is wound on said salient pole, striding across a plurality of slots, while being inserted sequentially through the inlet of a predetermined slot of said stator core; and

comprises;

two slot inserts to be inserted into said slot;

two coil ends located outside the end of said slot; and

four twist sections, arranged between said slot inserts and coil ends, processed by twisting; and

wherein, while the coils equivalent to a plurality of turns are wound on said salient pole, twisting is provided by said twist sections to ensure that the surface of said rectangular coil in the second coil end will be opposite to the surface of said rectangular coil in the first coil end; and

said coil ends are configured in such a way that the start of the rectangular coil winding and the end of the rectangular coil winding are located on one and the same side.

16. The rotating electrical machine described in claim 15, wherein, in the formation of said stator coils, a plurality of rectangular coils are laminated to form a layer coil and an even number of layer coils are laminated in such a way that the number of coil layers in two slot inserts will be the same as each other, whereby said stator coils are formed by serial connection.

17. The rotating electrical machine described in claim 16, wherein an even number of layer coils are laminated in the radial direction of the rotating electrical machine in the slot insert;

whereas, in the coil end, they are laminated in the axial direction of the rotating electrical machine.