Rotary electric machine

• US 8,519,583 B2
• Filed: 05/16/2008
• Issued: 08/27/2013
• Est. Priority Date: 05/16/2008
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Sakaue, Atsushi, Akita, Hiroyuki, Nakaue, Takumi
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US12/992,722
• Publication Number:
  US 20110068647A1
• Time in Patent Office: 1,929 Days
• Field of Search: 310/71
• US Class Current: 310/71
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles

Abstract

It is necessary to secure a workspace for connection between jumper wires and a wire connecting material.

A rotary electric machine includes a plurality of magnetic teeth and a wire connecting material for wire connection. The rotary electric machine further includes a plurality of jumper sections, which are portions of one conductive wire continuously wound around the magnetic teeth and continuously connect coils formed of the conductive wire wound around the magnetic teeth. The jumper section includes first jumper sections which each are not connected by the wire connecting material with another jumper section, and second jumper sections which each are connected by the wire connecting material with another jumper section. Each first jumper section and each second jumper section are configured differently in shape and position from each other.

Claims

1. A rotary electric machine comprising:

a wire connecting material used for wire connection;

a plurality of magnetic teeth;

first jumper sections which each are a portion of a conductive wire continuously wound around the plurality of magnetic teeth, and which each continuously connect coils that are formed of the conductive wire having been wound around the magnetic teeth, each of the first jumper sections not being connected to another jumper section by the wire connecting material; and

second jumper sections which each are a portion of the conductive wire continuously wound around the plurality of magnetic teeth, and which each continuously connect the coils that are formed of the conductive wire having been wound around the magnetic teeth, each of the second jumper sections being connected to another jumper section by the wire connecting material, each of the second jumper sections being different in shape and position from each of the first jumper sections;

wherein each of the coils has a coil end, and

with respect to a direction along a rotating shaft of a rotor which is fixed in the rotary electric machine, a height of each second jumper section based on the coil end is higher than a height of each first jumper section.

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

bobbins each partially interposed between a corresponding one of the coils and a corresponding one of the magnetic teeth; and

erect portions which stand upwardly from the bobbins in a direction along a rotating shaft of a rotor rotatably fixed in the rotary electric machine, wherein

a height of each second jumper section is higher than a height of each erect portion with respect to the direction along the rotating shaft, and

a height of each first jumper section is substantially the same as or lower than a height of each erect portion with respect to the direction along the rotating shaft.

3. The rotary electric machine according to claim 1, wherein

each of the coils has a coil end,

each of the second jumper sections further includes a connection portion at which wire connection is made by the wire connecting material, and

a distance between the connection portion in each second jumper section and one of the coil ends neighboring the second jumper section is longer than a distance between an arbitrary point of one of the first jumper sections and one of the coil ends neighboring the first jumper section.

4. The rotary electric machine according to claim 1, wherein a length of each second jumper section is longer than a length of each first jumper section.

5. The rotary electric machine according to claim 1, wherein each of the second jumper sections includes a linear portion, as a connection portion connected by the wire connecting material.

6. The rotary electric machine according to claim 1, wherein

slots are formed among the respective magnetic teeth, the slots each accommodating one side of each coil,

the first jumper sections include a jumper section that is one wire continuously connecting portions of the conductive wire respectively extending from adjacent two of the slots, and

the second jumper section includes at least one of a jumper section that is one wire continuously connecting portions of the conductive wire extending from a single one of the slots, and a jumper section that is one wire continuously connecting portions of the conductive wire respectively extending from two of the slots arranged with one slot sandwiched therebetween.

7. The rotary electric machine according to claim 1, wherein each of the second jumper sections is arranged to be positionally different, with respect to the radial direction of the rotary electric machine, from each of the first jumper sections.

8. The rotary electric machine according to claim 1, wherein

each of the coils has a coil end, and

the wire connecting material includes a grip portion for gripping each second jumper section toward the coil end or from the coil end.

9. The rotary electric machine according to claim 1, wherein

each of the second jumper sections stands upwardly in a direction along a rotating shaft of a rotor rotatably fixed in the rotary electric machine, and

the wire connecting material has a grip portion for gripping each second jumper section laterally relative to the direction along the rotating shaft.

10. The rotary electric machine according to claim 1, wherein

each of the second jumper sections stands upwardly in a direction along a rotating shaft of a rotor rotatably fixed in the rotary electric machine, and

the wire connecting material connects to two points of each second jumper section toward a rotation direction of the rotor or toward a direction opposite thereto.

11. The rotary electric machine according to claim 1, wherein the wire connecting material has a power feeding section for power supply.

12. The rotary electric machine according to claim 1, wherein the first jumper sections are arranged on a first side of the coils, and the second jumper sections are arranged on a second side of the coils.

13. The rotary electric machine according to claim 1, wherein,

each first jumper section and each second jumper section have root portions which stand from coil ends of their corresponding coils in a direction along a rotating shaft of the rotary electric machine and which are located at substantially the same area in a radial direction of the rotary electric machine,

each first jumper section is inclined outwardly in the radial direction, and

each second jumper section is inclined inwardly in the radial direction.

14. The rotary electric machine according to claim 1, wherein,

each first jumper section and each second jumper section have root portions which stand from coil ends of their corresponding coils in a direction along a rotating shaft of the rotary electric machine and which are located at substantially the same area in a radial direction of the rotary electric machine,

each first jumper section is inclined inwardly in the radial direction, and

each second jumper section is inclined outwardly in the radial direction.

15. A rotary electric machine comprising:

a plurality of magnetic teeth;

a wire connecting material used for wire connection;

slots formed among the magnetic teeth respectively adjacent to one another, the slots each accommodating one side of a coil;

bobbins each partially interposed between a corresponding one of the coils and a corresponding one of the magnetic teeth;

erect portions which stand upwardly from the corresponding bobbins in a direction along a rotating shaft of a rotor rotatably fixed in the rotary electric machine; and

jumper sections which each are a portion of a conductive wire continuously wound around the plurality of magnetic teeth, and which continuously connect the coils that are formed of the conductive wire having been wound around the magnetic teeth via portions of the bobbins, wherein

the jumper sections each include;

at least either of a contact portion which is a portion of the conductive wire extending from each slot and which comes in contact with the corresponding erect portions, and a routing portion which is a portion of the conductive wire extending from each slot and which is routed around the corresponding erect portions; and

a connection portion which extends from the contact portion or the routing portion in the direction along the rotating shaft and which is connected to the wire connecting material at a position distanced from a surface of the erect portions.

16. The rotary electric machine according to claim 15, wherein

each of the coils has a coil end, and

each of the jumper sections includes a linear portion which is connected to the wire connecting material at a position most distanced from the coil end of the coil in the direction along the rotating shaft.

17. The rotary electric machine according to claim 15, wherein

each of the coils has a coil end,

the conductive wire includes a first conductive wire portion and a second conductive wire portion which stand upwardly in the direction along the rotating shaft, and

a space between the first conductive wire portion and the second conductive wire portion is narrow at a position close to the coil end, and relatively widens with distance from the coil end as compared to the position close to the coil end.

18. The rotary electric machine according to claim 15, wherein each of the jumper sections continuously connects portions of the conductive wire extending from two slots arranged with one slot sandwiched therebetween, and substantially the entire length of the jumper section is distanced from coil ends of two coils sandwiched by the two slots.

19. The rotary electric machine according to claim 15, wherein each of the jumper sections has a substantially hairpin shape.

20. The rotary electric machine according to claim 15, wherein each of the jumper sections has a twisted portion where the conductive wire is twisted.