Patent ID: 11920673
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC F  H

Claim 25:
26. An electric drive apparatus comprising:
a rotating electric machine including a rotor, a stator and a first housing, the rotor being provided on a rotating shaft so as to rotate together with the rotating shaft, the stator including an annular stator core and a multi-phase stator coil, the first housing having both the rotor and the stator received therein; and
a transmission including a motive power transmitting unit, a second housing and lubricating oil, the motive power transmitting unit being configured to rotate with rotation of the rotating shaft, the second housing having the motive power transmitting unit received therein, the lubricating oil being provided in the second housing to lubricate the motive power transmitting unit,
wherein
the second housing is provided, on one side of the rotating electric machine in an axial direction of the rotating shaft, integrally with the first housing as one piece,
the first housing has a tubular part to which the stator core is assembled,
in the tubular part of the first housing, there is formed an annular coolant passage through which coolant flows,
the coolant passage extends axially outside the stator core on both the axial sides of the stator core, and
a dimensional relationship of D1<D2 is satisfied, where D1 is an axial distance between the stator core and a first axial end of the coolant passage on the opposite axial side of the stator core to the transmission and D2 is an axial distance between the stator core and a second axial end of the coolant passage on the same axial side of the stator core as the transmission.