Stator for Rotating Machine and Rotating Machine Using the Same

• US 20090140595A1
• Filed: 11/21/2008
• Published: 06/04/2009
• Est. Priority Date: 04/02/2007
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Hoshino, Katsuhiro, NAGANAWA, Takashi, Ishigami, Takashi, Ueda, Toshiaki, Obata, Koji
• Granted Patent: US 7,936,100 B2
• Time in Patent Office: Days
• US Class Current: 310/201
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles

Abstract

The stator includes a plurality of concentrated winding coils disposed coupled into an annular form through yokes, and a plurality of conductors that couple the coil ends of the concentrated winding coils to each other in a multi-phase connection fashion. Conductors for a U-phase, a V-phase, a W-phase, and neutral points P are each formed of a plurality of holes for inserting therethrough coil ends and are substantially circular with different diameters, and are disposed on the same plane. A connection plate provided with a wall is inserted between the conductors and the concentrated winding coils. A rotating machine includes the above-mentioned stator and a rotor that is rotatable within the stator.

Claims

1. A stator for a rotating machine, comprising:

a plurality of stator windings arranged in an annular form; and

a plurality of conductors that connect coil ends of the stator windings in a multi-phase connection fashion to each other, wherein

the plurality of conductors, which are each provided with a plurality of holes for inserting the coil end therethrough, are substantially circular, having different diameters, and disposed on the same plane.

2. A stator for a rotating machine according to claim 1, wherein

the stator windings are connected in a three-phase Y-connection fashion to form a U-phase, a V-phase, and a W-phase as well as neutral points,

the conductor for the neutral points are arranged on the same plane, and

one end of the stator winding is connected with either of the conductors for the U-phase, the V-phase and the W-phase, and the other end of the stator winding is connected with the conductor for the neutral points.

3. A stator for a rotating machine according to claim 1, wherein

the coil end of the stator winding is formed to have a substantially circular shape in cross-section,

an insulation coating of an insulation coated conductor wire is peeled off at the coil end, and

the stator further includes a junction part in which the coil end and the conductor are joined.

4. A stator for a rotating machine according to claim 3, wherein

the junction part is joined by welding or soldering.

5. A stator for a rotating machine according to claim 1, further comprising:

a connection plate made of an insulation material that is formed of a hole through which the coil end is inserted and interposed between the stator windings and the conductor.

6. A stator for a rotating machine according to claim 5, wherein

the hole formed in the connection plate has a diameter larger than that of the hole formed in the conductor.

7. A stator for a rotating machine according to claim 5, wherein

the connection plate is provided with a wall that increases creepage distance between the connection plate and the conductor adjacent thereto.

8. A stator for a rotating machine according to claim 1, wherein

the plurality of stator windings each are wound around one of a plurality of divided cores,

the divided cores are coupled with each other in a cylindrical fashion through respective yokes thereof, and

the conductors are located in a side surface perpendicular to the axial direction of the stator core being formed by coupling.

9. A stator for a rotating machine according to claim 8, further comprising:

a connection plate made of an insulation material that is formed of a hole through which the coil end is inserted and is interposed between the stator core and the conductor.

10. A stator for a rotating machine according to claim 1, wherein

the stator winding is formed by winding an insulation coated conductor wire that is substantially rectangular in cross-section, and the part of the stator winding constituting the coil end is formed into a substantially circular profile.

11. A stator for a rotating machine according to claim 1, wherein

the conductor is substantially rectangular or circular in cross-section.

12. A stator for a rotating machine according to claim 1, wherein

the conductor has an insulation coating thereon.

13. A rotating machine comprising:

a stator for a rotating machine according to claim 1; and

a rotor that is rotatable within the stator.