Invention Grant
- Patent Title: Electric drive unit with encapsulated field windings and seal member
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Application No.: US17878459Application Date: 2022-08-01
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Publication No.: US12046981B2Publication Date: 2024-07-23
- Inventor: James P. Downs , Paul J. Valente
- Applicant: AMERICAN AXLE & MANUFACTURING, INC.
- Applicant Address: US MI Detroit
- Assignee: AMERICAN AXLE & MANUFACTURING, INC.
- Current Assignee: AMERICAN AXLE & MANUFACTURING, INC.
- Current Assignee Address: US MI Detroit
- Agency: Reising Ethington P.C.
- Main IPC: H02K1/16
- IPC: H02K1/16 ; H02K1/20 ; H02K5/124 ; H02K5/18 ; H02K5/22 ; H02K11/30 ; H02K11/33 ; H01L23/367 ; H02K19/10 ; H02M7/00 ; H02P27/06

Abstract:
An electric drive unit having an electric motor, which has a rotor and a stator that includes a stator core and field windings, a housing assembly into which the electric motor is received, and a seal member. The stator core defines a plurality of stator cooling passages that extend longitudinally through the stator core. Each of the field windings has a protruding portion that extends from an axial end of the stator core. The protruding portions are encapsulated in a plastic material. The housing assembly has an annular wall member that defines a seal groove. The seal member is received in the seal groove and forms a seal between the annular wall member and the plastic encapsulation on the protruding portion of the field windings. A coolant is circulated through the stator cooling channels, and the seal member inhibits ingress of the coolant between the stator and the rotor.
Public/Granted literature
- US20220393522A1 ELECTRIC DRIVE UNIT Public/Granted day:2022-12-08
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