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US 2026/0238087 A1Published application
Motor and aircraft
AssigneeNidec Corporation
InventorAtsushi YAWATA
Life of this patent
Estimating the term…
Abstract
A motor includes a rotor, a stator, and a flow pipe. The rotor is rotatable about a central axis extending in an axial direction. The stator includes an annular stator core surrounding the central axis. A fluid can flow through the flow pipe. The stator further includes coils located on the stator core. The flow pipe includes a connection pipes extending in the axial direction and arranged in a circumferential direction. Each of the connection pipes is located radially inward with respect to the coils and is in direct or indirect contact with the stator core.
Claims14
1-14. (canceled)
15:
- A motor comprising:
- a rotor rotatable about a central axis extending in an axial direction;
- a stator including a stator core having an annular shape and surrounding the central axis;
- and
- a flow pipe allowing a fluid to flow through;
- wherein
- the stator further includes coils located on the stator core;
- the flow pipe includes connection pipes extending in the axial direction and arranged in a circumferential direction;
- each of the connection pipes is located radially inward with respect to the plurality of coils and is in direct or indirect contact with the stator core;
- each of the coils includes:
- a first coil head located on one axial side with respect to the stator core;
- and
- a second coil head located on another axial side with respect to the stator core;
- and
- the flow pipe includes at least one of:
- a first cooling pipe that is located on the one axial side with respect to the first coil head, opposes the first coil head in the axial direction, and extends in the circumferential direction;
- a second cooling pipe that is located on the one axial side with respect to the stator core and radially inward with respect to the first coil head, opposes the first coil head in the radial direction, and extends in the circumferential direction;
- a third cooling pipe that is located on the one axial side with respect to the stator core and radially outward with respect to the first coil head, opposes the first coil head in the radial direction, and extends in the circumferential direction;
- a fourth cooling pipe that is located on the other axial side with respect to the second coil head, opposes the second coil head in the axial direction, and extends in the circumferential direction;
- a fifth cooling pipe that is located on the other axial side with respect to the stator core and radially inward with respect to the second coil head, opposes the second coil head in the radial direction, and extends in the circumferential direction;
- and
- a sixth cooling pipe located on the other axial side with respect to the stator core and radially outward with respect to the second coil head, opposes the second coil head in the radial direction, and extends in the circumferential direction.
19 more elements
16:
- The motor according to claim 15, wherein at least one of the connection pipes is located radially inward with respect to each of the coils.
17:
- The motor according to claim 15, wherein
- each of the connection pipes is in contact with at least one of:
- one axial side of each of the coils with respect to the stator core;
- and
- another axial side of each of the coils with respect to the stator core.
2 more elements
18:
- The motor according to claim 15, wherein the at least one cooling pipe is in direct or indirect contact with each of the coils.
19:
- The motor according to claim 15, wherein
- the at least one cooling pipe includes at least one of the second cooling pipe, the third cooling pipe, the fifth cooling pipe, and the sixth cooling pipe;
- and
- the at least one cooling pipe is in direct or indirect contact with the stator core.
1 more element
20:
- The motor according to claim 15, wherein
- the coils are arranged in the circumferential direction;
- and
- a plurality of the at least one cooling pipe are arranged in the circumferential direction.
1 more element
21:
- The motor according to claim 15, wherein
- the flow pipe further includes:
- an inflow pipe to allow the fluid, flowing from an outside to an inside of the motor, to flow;
- an outflow pipe to allow the fluid, flowing out from the inside to the outside of the motor, to flow;
- and
- each of the inflow pipe and the outflow pipe is drawn out of the motor.
3 more elements
22:
- The motor according to claim 21, wherein the inflow pipe extends in a direction intersecting the axial direction, and axially opposes a portion on another axial side of each of the coils with respect to the stator core.
23:
- The motor according to claim 21, wherein the inflow pipe opposes the outflow pipe in the axial direction, and is located on one axial side with respect to the outflow pipe.
24:
- The motor according to claim 21, further comprising:
- a stator holder located on a radially inner side with respect to the stator core and including a holder cylindrical portion that holds the stator core;
- wherein
- the stator holder further includes a holder plate extending radially outward from the holder cylindrical portion;
- and
- at least one of the inflow pipe and the outflow pipe is located between the stator and the holder plate, and extends in a direction intersecting the axial direction.
3 more elements
25:
- The motor according to claim 23, wherein
- one axial end of at least one of the inflow pipe and the outflow pipe is in contact with another axial end of the stator;
- and
- another axial end of the at least one of the inflow pipe and the outflow pipe is in contact with one axial end of the holder plate.
1 more element
26:
- The motor according to claim 15, wherein the flow pipe is located on another axial side with respect to one axial end of the first coil head.
27:
- An aircraft comprising:
- the motor according to claim 15;
- and
- a tank to store a fluid to be supplied to the motor.
1 more element