Stator, motor, and compressor

Patent metadata

Field	Value
Publication number	US-10680482-B2
Application number	US-201816058324-A
Country	US
Kind code	B2
Filing date	Aug 8, 2018
Priority date	Feb 8, 2016
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A stator includes a plurality of lead wires extending upward from a coil and a guide member supporting the lead wire above the coil. The guide member is an insulating body. The guide member includes a lower plate, an inner wall, and an upper plate. The lower plate spreads annularly around a central axis. The inner wall extends upward from an inner circumference of the lower plate. The upper plate extends from the inner wall to a radial outside. A single lead wire accommodation space exists on an upper side of the lower plate, a lower side of the upper plate, and a radial outside of the inner wall. The plurality of lead wires are circumferentially disposed along the inner wall in the lead wire accommodation space.

First claim

What is claimed is:

1. A stator comprising:
a stator core including an annular core back surrounding a vertically extending central axis and a plurality of teeth extending from the core back to a radial inside;
a plurality of coils constructed with conducting wires wound around the teeth;
an insulator insulating the stator core from the coil;
a plurality of lead wires extending upward from the coil; and
a guide member supporting the lead wire on an upper side of the coil,
wherein the guide member is an insulating body including:
a lower plate spreading annularly around the central axis;

an inner wall extending upward from an inner circumference of the lower plate; and
an upper plate extending from the inner wall to a radial outside,

a single lead wire accommodation space exists on an upper side of the lower plate, a lower side of the upper plate, and a radial outside of the inner wall, and
the plurality of lead wires are disposed in a circumferential direction along the inner wall in the lead wire accommodation space.

2. The stator according to claim 1 , wherein
the plurality of coils include:
a U-phase coil to which U-phase current is supplied;
a V-phase coil to which a V-phase current is supplied; and
a W-phase coil to which a W-phase current is supplied,

the plurality of lead wires include:
a U-phase common line drawn from the U-phase coil;
a V-phase common line drawn from the V-phase coil; and
a W-phase common line drawn from the W-phase coil, and

a neutral point, which is a connection portion of the U-phase common line, the V-phase common line, and the W-phase common line, is disposed on the upper side of the lower plate.

3. The stator according to claim 2 , further comprising a first fastening member fixing the neutral point to a part of the guide member.

4. The stator according to claim 1 , further comprising a second fastening member fixing each of a U-phase feeder line, a V-phase feeder line, and a W-phase feeder line to a part of the guide member
Wherein
the plurality of coils include:
a U-phase coil to which a U-phase current is supplied;
a V-phase coil to which a V-phase current is supplied; and
a W-phase coil to which a W-phase current is supplied, and

the plurality of lead wires includes:
the U-phase feeder line drawn from the U-phase coil;
the V-phase feeder line drawn from the V-phase coil; and
the W-phase feeder line drawn from the W-phase coil.

5. The stator according to claim 1 , wherein the guide member includes a plurality of the upper plates radially arranged with respect to the central axis.

6. The stator according to claim 1 , further comprising a plurality of connection terminals supported by the guide member in order to be connected to an external connection terminal provided separately from the motor,
wherein at least a part of the plurality of lead wires is connected to the connection terminal.

7. The stator according to claim 6 , further comprising a terminal case for accommodating the connection terminal so that the connection terminal can be connected to the external connection terminal in an axial direction,
wherein the terminal case is attached to at least one of the guide member and the insulator.

8. The stator according to claim 7 , wherein the terminal case is disposed in an annular region surrounded by an innermost diameter of the teeth and an outermost diameter of the core back.

9. The stator according to claim 7 , wherein
the terminal case includes:
a case bottom disposed above at least a part of the plurality of lead wires; and
a case body forming an accommodation space accommodating the connection terminal together with the case bottom, and

the case bottom includes an accommodation groove in which the connection terminal and the lead wire connected to the connection terminal are disposed in a predetermined portion.

10. The stator according to claim 9 , wherein the connection terminal abuts on the lower plate and the case body.

11. The stator according to claim 7 , further comprising a fixing member that fixes the terminal case to the guide member.

12. The stator according to claim 1 , wherein
the insulator includes:
an insulating portion interposed between each of the teeth and the coil;
an annular portion covering at least a part of the top face of the core back; and
an outer wall extending upward from the annular portion,

the bottom face of the lower plate is located below the top face of the outer wall,
one of the lower plate and the outer wall includes a projection, and
the other of the lower plate and the outer wall includes a pair of regulating faces restricting movement of the projection in the circumferential direction.

13. The stator according to claim 12 , wherein
the projection is provided on the outer wall so as to extend radially inward,
a pair of protrusions protruding upward is provided separately from each other in the circumferential direction on the top face of the lower plate, and
the pair of regulating faces is faces opposed to each other in the circumferential direction of the pair of protrusions.

14. The stator according to claim 1 , wherein
the insulator includes:
an insulating portion interposed between each of the teeth and the coil;
an annular portion covering at least a part of the top face of the core back; and
an outer wall extending upward from the annular portion,

the bottom face of the lower plate contacts with the top face of the outer wall,
one of the lower plate and the outer wall includes a pawl extending in the axial direction, and
the other of the lower plate and the outer wall includes a receiving portion restricting movement of the pawl in the axial direction.

15. The stator according to claim 9 , wherein
the outer wall includes a plurality of first notches, which are recessed downward from an upper end and pierce in the radial direction, and
the lower end of the first notch is located below the bottom face of the lower plate to include a gap where the lead wire can be inserted between the lower end and the bottom face of the lower plate.

16. The stator according to claim 15 , wherein
a plurality of second notches, which are recessed radially inwardly from the outer peripheral edge of the lower plate portion and pierce in the axial direction, are provided in a region of the lower plate, the region being opposed to the first notch in the radial direction, and
the lead wire is drawn through the second notch.

17. The stator according to claim 1 , wherein
the lower plate includes at least one hole piercing in the axial direction, and
the hole and a gap formed between the circumferentially adjacent teeth overlap each other in the axial direction.

18. The stator according to claim 17 , wherein the upper plate and the hole overlap each other in the axial direction.

19. The stator according to claim 18 , wherein an area of the upper plate is smaller than an area of the hole when viewed in the axial direction.

20. The stator according to claim 1 , wherein a material for the guide member is polyphenylene sulfide or a liquid crystal polymer.

21. The stator according to claim 1 , the stator being used for a driving motor of an electric compressor.

22. A motor comprising:
the stator according to claim 1 ; and
a rotor disposed on a radial inside of the stator.

23. An electric compressor driven by the motor according to claim 22 .

Assignees

• Nidec Corp

Inventors

• Okamoto Toshiya
• Kawashima Shota
• Aono Masato
• Migita Takayuki

Classifications

• H02K3/325

  for windings on salient poles, such as claw-shaped poles · CPC title

• H02K5/225

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

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · 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

• H02K1/274

  the rotor consisting of two or more circumferentially positioned magnets · CPC title