Motor

Patent metadata

Field	Value
Publication number	US-10411543-B2
Application number	US-201515527420-A
Country	US
Kind code	B2
Filing date	Nov 12, 2015
Priority date	Nov 17, 2014
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

Provided is a motor including a shaft; two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance; a stator arranged between the two rotors; a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar; and a housing arranged to hold the stator and house the two rotors therein. The stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores. A lead wire drawn out from the coils is arranged to extend, radially outside of the one of the rotors, from the corresponding core to a position on the one axial side of the one of the rotors, and is connected to the busbar at the position. The busbar unit is housed in the housing.

First claim

The invention claimed is:

1. A motor comprising:
a shaft having a central axis extending in one direction as a center thereof;
two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance;
a stator arranged between the two rotors;
a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar electrically connected to the stator, the at least one of the two rotors being located axially between the busbar unit and the stator; and
a housing arranged to hold the stator and house the two rotors therein; wherein
the stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores;
a lead wire drawn out from the coils is arranged to extend, radially outside of the at least one of the two rotors, from the corresponding core to a position on the one axial side of the at least one of the two rotors, and is connected to the busbar at the position;
the busbar unit is housed in the housing;
the stator includes a lead wire support portion radially opposed to the at least one of the two rotors, and the lead wire is led out in the axial direction from the corresponding core through the lead wire support portion;
an end portion of the lead wire support portion on the one axial side is arranged on an axial surface of the at least one of the two rotors facing the one axial side;
the cores are fixed to one another through a resin; and
the lead wire support portion is defined as a portion of the resin at an outer circumferential portion of the stator radially outside of and opposed to the at least one of the two rotors on the one axial side.

2. The motor according to claim 1 , wherein the lead wire is connected to the busbar on the one axial side of the lead wire support portion.

3. The motor according to claim 2 , wherein the lead wire is connected to the busbar at a position radially inward of the lead wire support portion.

4. The motor according to claim 1 , wherein the lead wire support portion is arranged at a boundary between circumferentially adjacent ones of the cores or at an outer circumferential end of the stator on a radially outer side of the boundary.

5. A motor comprising:
a shaft having a central axis extending in one direction as a center thereof;
two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance;
a stator arranged between the two rotors;
a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar electrically connected to the stator, the at least one of the two rotors being located axially between the busbar unit and the stator; and
a housing arranged to hold the stator and house the two rotors therein; wherein
the stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores;
a lead wire drawn out from the coils is arranged to extend, radially outside of the at least one of the two rotors, from the corresponding core to a position on the one axial side of the at least one of the two rotors, and is connected to the busbar at the position;
the busbar unit is housed in the housing;
the stator includes a lead wire support portion radially opposed to the at least one of the two rotors, and the lead wire is led out in the axial direction from the corresponding core through the lead wire support portion;
an end portion of the lead wire support portion on the one axial side is arranged on an axial surface of the at least one of the two rotors facing the one axial side;
the cores are fixed to one another through a resin; and
the lead wire support portion is defined by an insulating member arranged to cover at least a portion of the lead wire at an outer circumferential portion of the stator radially outside of the rotor on the one axial side.

6. A motor comprising:
a shaft having a central axis extending in one direction as a center thereof;
two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance;
a stator arranged between the two rotors;
a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar electrically connected to the stator, the at least one of the two rotors being located axially between the busbar unit and the stator; and
a housing arranged to hold the stator and house the two rotors therein; wherein
the stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores;
a lead wire drawn out from the coils is arranged to extend, radially outside of the at least one of the two rotors, from the corresponding core to a position on the one axial side of the at least one of the two rotors, and is connected to the busbar at the position;
the busbar unit is housed in the housing;
the stator includes a lead wire support portion radially opposed to the at least one of the two rotors, and the lead wire is led out in the axial direction from the corresponding core through the lead wire support portion;
an end portion of the lead wire support portion on the one axial side is arranged on an axial surface of the at least one of the two rotors facing the one axial side;
the cores are fixed to one another through a resin;
the stator includes an insulator attached to the cores; and
the lead wire support portion is defined as a portion of the insulator at an outer circumferential portion of the stator radially outside of and opposed to the rotor on the one axial side.

Assignees

• Nidec Corp
• Nidec Taiwan Corp

Inventors

• Makino Yusuke
• Kawai Yoshiki
• Morita Keisuke
• Yan Guo Jhih
• Lin Hsiu Ying

Classifications

• H02K2201/15

  Sectional machines · CPC title

• H02K3/521

  applicable to stators only · CPC title

• H02K1/14

  Stator cores with salient poles · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K3/50 Primary

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