公开(公告)号：US11283331B2

公开(公告)日：2022-03-22

申请号：US16585017

申请日：2019-09-27

Applicant: DENSO CORPORATION

Inventor： Hiroshi Endo ,  Shohei Yoshioka

IPC: H02K9/19 ,  H02K9/28 ,  H02K1/2706 ,  H02K5/20

Abstract: A rotating electric machine includes a rotating shaft, a rotor fixed on the rotating shaft, a stator arranged to radially face the rotor, and a housing having a tubular part. The tubular part has the stator assembled thereto on a radially inner or radially outer side thereof. Moreover, the tubular part has an inner wall portion and an outer wall portion that are radially spaced from and radially face each other. Between the inner wall portion and the outer wall portion, there is formed an annular coolant passage through which coolant flows. On an external surface of the tubular part of the housing on an opposite radial side to the stator, at least one elongate protrusion is formed, in an axial range where the at least one elongate protrusion radially overlaps the coolant passage, to extend obliquely or parallel to an axial direction of the rotating shaft.

公开(公告)号：US11271450B2

公开(公告)日：2022-03-08

申请号：US16736965

申请日：2020-01-08

Applicant: DENSO CORPORATION

Inventor： Shohei Yoshioka ,  Atsuo Ishizuka

IPC: H02K5/20 ,  H02K9/19 ,  H02K11/21 ,  H02K24/00

Abstract: A rotary electric machine includes a cylindrical portion. In the cylindrical portion, a coolant passage having annular shape is formed to allow the coolant to flow therethrough. The coolant passage is formed meandering in the axial direction and the passage width of the coolant passage in a first end side in the radial direction is narrower than the passage width in the radial direction in the second end side. The coolant passage includes a circumferential passage in the first end side where the coolant flows in the circumferential direction. The circumferential passage is configured such that a passage opening area of an intermediate portion between an input portion in an upstream side of the coolant passage and an output portion in a downstream side of the coolant passage is expanded compared to those of the input portion and the output portion.