Lead wire connection structure of rotating electric machine

Patent metadata

Field	Value
Publication number	US-9627946-B2
Application number	US-201114131479-A
Country	US
Kind code	B2
Filing date	Oct 12, 2011
Priority date	Oct 12, 2011
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A lead wire connection structure includes a rectifier that is arranged at the outside or the inside in an axis direction of the brackets so as to rectify AC voltage, which is generated on the stator, to DC voltage; in which, when a number of conductors of a connecting portion, at which lead conductors of the stator winding and the rectifier are connected, is “N” (N is integer and greater than or equal to 2) per one position, conductors, of which number is less than or equal to “N−1” per one position, are connected at the connecting portion, and conductors excepted from the conductors, of which number is less than or equal to “N−1”, are welded onto the remaining conductors at a position being nearer the stator winding side than the connecting portion.

First claim

What is claimed is:

1. A lead wire connection structure of a rotary electric machine, comprising:
a housing that is composed of a front bracket and a rear bracket;
a rotor that is fixed to a shaft, which is supported between the brackets, so as to be rotatably arranged in the housing;
a stator that includes a stator core having an annular shape, which is sandwiched by the front bracket and the rear bracket so as to surround the rotor, and a stator winding which is mounted on the stator core; and
a rectifier that is arranged at the outside or the inside in an axis direction of the brackets so as to rectify AC voltage, which is generated on the stator, to DC voltage,
wherein a connecting portion, at which lead portions of the stator winding and the rectifier are connected, comprises at least two conductors extending from the stator winding per position,
wherein at least one conductor of the at least two conductors is connected to the rectifier at the connecting portion, and
wherein the remaining conductors of the at least two conductors are welded onto the at least one conductor at a position nearer the stator winding than the connecting portion.

2. A lead wire connection structure of the rotary electric machine as recited in claim 1 , wherein the at least one conductor is passed through a hole of a circuit board which is provided on the brackets, so as to be connected to the rectifier.

3. A lead wire connection structure of the rotary electric machine as recited in claim 1 , wherein the at least conductor is connected to the rectifier via connecting hardware, and the remaining conductors are directly welded onto the remaining conductors at the position nearer the stator winding than the connecting portion.

4. A lead wire connection structure of the rotary electric machine as recited in claim 3 , wherein the at least two conductors are mutually connected in a radial direction.

5. A lead wire connection structure of the rotary electric machine as recited in claim 3 , wherein the at least two conductors are welded by melting a tip of a short side of the lead conductors and by inlaying the welded tip to a long side of the lead conductors.

6. A lead wire connection structure of the rotary electric machine as recited in claim 5 , wherein a melting ratio of the short side of the lead conductors is greater than a melting ratio of the long side of the lead conductors.

Assignees

• Imazawa Yoshiro
• Tanaka Kazunori
• Sasahara Ryoichi
• Mitsubishi Electric Corp

Inventors

• Imazawa Yoshiro
• Tanaka Kazunori
• Sasahara Ryoichi

Classifications

• H02K3/50 Primary

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K11/05

  Rectifiers associated with casings, enclosures or brackets · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K19/36

  Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches · CPC title