Quantcast

Alternator

Imported: 23 Feb '17 | Published: 22 Oct '02

Atsushi Oohashi, Yoshihiro Harada, Yoshihito Asao, Katsumi Adachi

USPTO - Utility Patents

Abstract

An alternator includes a stator winding in which a plurality of lead wires extending from winding phase groups for each phase are connected in an alternating connection via a terminal assembly for three-phase connection, and the terminal assembly for three-phase connection is disposed at a side of a rotor to which a fan unit is fixed and opposite to the rotor with respect to an end face of the fan unit in the axial direction of the rotor, the terminal assembly opposing the top of a coil-end group of the stator winding.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is sectional view of an automotive alternator according to an embodiment of the present invention;

FIG. 2 is a perspective view showing part of a strand of wire constituting a stator winding used in the automotive alternator shown in FIG. 1;

FIG. 3 is a diagram explaining arrangement of the strands of wire constituting the stator winding used in the automotive alternator shown in FIG. 1;

FIG. 4A is an end view of a winding assembly constituting the stator winding used in the automotive alternator shown in FIG. 1;

FIG. 4B is a plan view of the winding assembly constituting the stator winding used in the automotive alternator shown in FIG. 1;

FIG. 5 is a rear-end view explaining connections in one phase of the stator winding used in the automotive alternator according to the embodiment of the present invention;

FIG. 6 is a rear-end view explaining connections in three phases of the stator winding used in the automotive alternator according to the embodiment of the present invention;

FIG. 7 is a perspective view of a stator used in the automotive alternator according to the embodiment of the present invention;

FIG. 8 is a perspective view of a rectifier used in the automotive alternator according to the embodiment of the present invention;

FIG. 9 is a plan view of the rectifier used in the automotive alternator according to the embodiment of the present invention;

FIG. 10 is a perspective view showing the mounting of the stator to the rectifier, used in the automotive alternator according to the embodiment of the present invention;

FIG. 11 is a sectional view of a known automotive alternator proposed in Japanese Patent Application No. 2000-011704;

FIG. 12 is a perspective view of a stator used in the known automotive alternator;

FIG. 13 is a rear-end view explaining connections in one phase of the stator winding used in the known automotive alternator;

FIG. 14 is a perspective view of a three-phase-connection terminal-assembly used in the stator of the known automotive alternator;

FIG. 15 is an illustration explaining a method of the connection between the stator winding and a rectifier used in the known automotive alternator; and

FIG. 16 is a block diagram of a circuit used in the known automotive alternator.

Claims

1. An alternator comprising:

2. The alternator according to claim 1, wherein said fan unit is fixed to said rotor at at least one end thereof, said rectifier is disposed at a side of said rotor to which said fan unit is fixed, said conductive relay member is disposed at the side of said rotor to which said fan unit is fixed and is disposed opposite to said rotor with respect to an end face of said fan unit in the axial direction of said rotor, said plurality of lead wires serve as alternating-output lead wires for said three-phase alternating winding, said conductive relay member serves as conductive alternating-output-relay members having alternating-current-output-connection terminals extending inwardly in the radial direction of said rotor, and said alternating-output lead wires are connected to said conductive alternating-output-relay members and are connected to said rectifier via said alternating-current-output-connection terminals.

3. The alternator according to claim 1, wherein said plurality of lead wires serve as neutral-point-connection lead wires for said winding phase group, said conductive relay member serves as a conductive neutral-point-relay member, and said neutral-point-connection lead wire for each phase is integrally connected to said conductive neutral-point-relay member.

4. The alternator according to claim 3, wherein said conductive neutral-point-relay member includes a neutral-point-connection terminal extending inwardly in the radial direction of said stator, and said neutral-point-connection terminal is connected to said rectifier.

5. The alternator according to claim 1, wherein said plurality of lead wires serve as bridge-connection lead wires between said first winding sub-portions and said second winding sub-portions, said conductive relay member serves as conductive bridge-connection-relay members, and said bridge-connection lead wires are connected to said conductive bridge-connection-relay members, whereby said first winding sub-portions and said second winding sub-portions are bridge-connected.

6. The alternator according to claim 1, wherein said plurality of lead wires extend in parallel to each other from said first winding sub-portions and said second winding sub-portions in the axial direction, and are connected to said conductive relay member substantially at the same predetermined level as each other from an end face of said stator core.

7. The alternator according to claim 1, wherein said conductive relay member and an insulative resin member are formed integrally with each other.

8. The alternator according to claim 1, wherein said stator is formed so that the coil-end group of said stator winding does not overlap said fan unit in the radial direction.

9. The alternator according to claim 1, wherein the size of said conductive relay member in a radial direction of said stator is not greater than the size of the coil-end group of said stator winding in the radial direction of said stator.

10. The alternator according to claim 1, wherein said strand of wire is a continuous conductive wire, and said first winding sub-portion and said second winding sub-portion form each of said first wave-shaped windings wound in one turn and each of said second wave-shaped windings wound in one turn, respectively.

11. The alternator according to claim 10, wherein each pair of said first wave-shaped windings and said second wave-shaped windings is formed with a winding assembly composed of a plurality of said first winding sub-portions and a plurality of said second winding sub-portions.