Alternator equipped with stator having twisted inputs

• US 20060001326A1
• Filed: 05/23/2003
• Published: 01/05/2006
• Est. Priority Date: 05/28/2002
• Status: Active Grant

• Current Assignee: Valeo Equipements Electriques Moteur (Valeo SE)
• Original Assignee: Valeo Equipements Electriques Moteur (Valeo SE)
• Inventors: Even, Denis, Faverolle, Pierre, Tarrago, Jean-Luc
• Granted Patent: US 7,170,210 B2
• Time in Patent Office: Days
• US Class Current: 310/179
• CPC Class Codes: H02K 15/0056 Manufacturing winding connections
• CPC Class Codes: H02K 15/0081 for form-wound windings
• CPC Class Codes: H02K 2203/09 Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• CPC Class Codes: H02K 3/50 Fastening of winding heads, equalising connectors, or connections thereto

Abstract

The invention concerns an alternator, in particular for motor vehicle, comprising a stator (13) provided with a cylindrical body (14) bearing several phases (P), each phase comprising an input (E1 to E3) and an output, and electrically conductive interconnected elements (50) connecting the phase inputs to the phase output, the inputs (E1 to E3) consisting of rods having at least one longitudinal flat surface (21), each input including a first segment (25) passing through the body (14) of the stator (13) and a second end segment (26) extending from an axial side of said body (14), the second segments (26) of the inputs (E1 to E3) are twisted, the flat surface (21) of each input (E1 to E3) extending along the first segment (25) in a radial plane, and extending along the second end segment (26) either to form a cylindrical portion coaxial with the body (14) of the stator (13) or in a plane tangential to a cylinder coaxial with the body (14) of the stator (13).

Claims

1. Alternator, primarily for an automobile, containing one stator (13) equipped with a cylindrical body (14) with several phases (P), with each phase including, first, an input (E1 to E12) and an output (S1 to S3) located at least in part on the outside of the body (14) of the stator (13) and, second, electrical conducting elements (50) crossing the body (14) of the stator (13) to form the two axial sides opposite the body of the first and second chignons (12, 12′

);

the conducting elements (50) are electrically connected to form at least one winding that connects the phase inputs to the phase outputs;

the inputs (E1 to E12) are composed of bars with at least one longitudinal flat surface (21 to 24) extending along at least one part of the bar;

each input includes a first segment (25) crossing the body (14) of the stator (13) and a second end segment (26 to 40) extending from an axial side of this body (14);

the second segments (26 to 40) of the inputs (E1 to E12) are located on the same axial side of the body (14) of the stator (13) and are electrically connected to form a neutral point (53, characterized by the fact that the inputs (E1 to E12) are twisted, with the flat surface (21 to 24) of each input (E1 to E12) extending along the first segment (25) in a generally radial plane, and extending along the second end segment (26 to 40) either to form a coaxial cylinder portion in the body (14) of the stator (13) or in a plane at a tangent to a coaxial cylinder in the body (14) of the stator (13).

2. Alternator as claimed in claim 1, wherein the second segments (26, 27) of the inputs (E1, E2, E3) are identical.

3. Alternator as claimed in claim 2, wherein the second segments (27) of the inputs (E1, E2, E3) are electrically connected through a neutral bar (54) with a circumferential orientation, with the second segments (27) of the inputs (E1, E2, E3) attached to this neutral bar (54) through their respective flat surfaces (21).

4. Alternator as claimed in claim 3, wherein the second segments (27) of the inputs (E1, E2, E3) have a circumferential orientation, and their respective flat surfaces (21) form coaxial cylinder portions in the body (14) of the stator (13).

5. Alternator as claimed in claim 3, wherein the second segments (27) of inputs (E1, E2, D3) extend in an axial direction, with their respective flat surfaces (21) extending in planes that are tangent to the neutral bar (54).

6. Alternator as claimed in claim 1, wherein a first input (E4) include a second relatively long segment (28) with a circumferential orientation, two other inputs (E5, E6) with second segments (30, 31) that are the same length and relatively shorter than the length of the second segment (28) of the first input (E4), with the flat surface (22) of the second segment (28) of the first input (E4) forming a coaxial cylinder portion in the body (14) of the stator (13);

the second segments (30, 31) of the other two inputs (E5, E6) are attached through their respective flat surfaces (22) onto the flat surface (22) of the second segment (28) of the first input (E4).

7. Alternator as claimed in claim 6, wherein the second segments of the other two inputs (E5, E6) have a circumferential orientation and extend in the same direction, clockwise or counterclockwise, with their respective flat surfaces (22) forming coaxial cylinder portions in the body (14) of the stator (13).

8. Alternator as claimed in claim 6, wherein the second segments (30, 31) of the other two inputs (E5, E6) have a circumferential orientation, and extend in opposite directions-clockwise for one and counterclockwise for the other, with their respective flat surfaces (22) forming portions of coaxial cylinders in the body (14) of the stator (13).

9. Alternator as claimed in claim 1, wherein two inputs (E7, E8) are combined through their respective second segments (32, 33) to form the two branches of a pin (55);

these respective second segments (32, 33) have a circumferential orientation and the respective flat surfaces (23) of these two second segments (32, 33) are arranged in an extension of each other and form a coaxial cylinder portion in the body (14) of the stator (13);

a third input (E9) is attached through the flat surface (23) of its second segment (34, 35) to said cylinder portion.

10. Alternator as claimed in claim 9, wherein the inputs (E7, E8, E9) are located at different angles around the axis of the body (14) of the rotor (13);

the two inputs (E7, E8) combined into a pin are consecutive along the circumference of the body (14) of the stator (13).

11. Alternator as claimed in claim 9, wherein the inputs (E7, E8, E9) are located at different angles around the axis of the body (14) of the rotor (13);

the two inputs (E7, E8) combined into a pin are not consecutive around the circumference of the body (14) of the stator (13).

12. Alternator as claimed in any of claims 9 to 11, wherein the second segment (34) of the third input (E9) has a circumferential orientation, with the flat surface (23) forming a coaxial cylinder portion in the body (14) of the stator (13).

13. Alternator as claimed in claim 9, wherein the second segment (35) of the third input (E9) extends in an axial direction, with the flat surface (23) extending into a plane tangent to the combined second segments (32, 33) of the two inputs (E7, E8) forming a pin.

14. Alternator as claimed in claim 1, wherein the second segments (36 to 40) of the inputs (E10, E11, E12) have a circumferential orientation and all extend in parallel over at least one part of their length.

15. Alternator as claimed in claim 14, wherein the second segments (36, 37, 38) of the inputs (E11, E12) all extend in the same clockwise or counterclockwise direction.

16. Alternator as claimed in claim 14, wherein the respective second segments (39, 40) of at least two inputs (E11, E12) extend in opposite directions, clockwise for one and counter-clockwise for the other

17. Alternator as claimed in claim 1, wherein at least one of the inputs (E1 to E12) includes an axial segment (56) that extends its second segment (26 to 40) in a direction opposite the body (14) of the stator (13).

18. Alternator as claimed in any of claims 1 to 17, wherein the second segments (26 to 40) of the inputs (E1 to E12) are located at an axial end of the first or second chignon (12, 12′

).