Stator frame, stator and rotary electrical machine
AssigneeFanuc Corporation
InventorShinobu Takano
Life of this patent
Estimating the term…
Abstract
A stator frame includes a flow path which is formed spirally from one end side to the other end side in the axial direction of the stator frame between an inner circumferential surface and an outer circumferential surface while circling along a circumferential direction of the stator frame and within which a coolant is circulated, where a side wall portion which isolates the adjacent parts of the flow path, an inner wall portion which isolates the flow path from the inner circumferential surface of the stator frame and an outer wall portion which isolates the flow path from the outer circumferential surface of the stator frame are integrally formed.
Claims8
A stator frame which has a function of cooling a stator in a rotary electrical machine and which is formed in a substantially tubular shape, the stator frame comprising:
- a flow path between an inner circumferential surface and an outer circumferential surface along a circumferential direction of the stator frame and within which a coolant is circulated, the flow path circling the stator frame more than once, axially, and in one direction,
- wherein a side wall portion which isolates adjacent flow paths from each other, an inner wall portion which isolates the flow path from the inner circumferential surface of the stator frame and an outer wall portion which isolates the flow path from the outer circumferential surface of the stator frame are integrally formed as a tunnel-like enclosed space,
- on a surface in contact with an iron core, a junction region where a material of the iron core and a material of the stator frame are mixed is formed integrally following recesses and projections on a surface of the iron core.
Dependencies are inferred from the claim text.