US Patent No. 10,461,593

ROTARY ELECTRIC MACHINE


Patent No. 10,461,593
Issue Date October 29, 2019
Title Rotary Electric Machine
Inventorship Makoto Fujihira, Wako (JP)
Toshiyuki Nagumo, Wako (JP)
Assignee HONDA MOTOR CO., LTD., Tokyo (JP)

Claim of US Patent No. 10,461,593

1. A rotary electric machine comprising:an annular stator;
a ring-shaped passage through which a cooling medium flows about a circumference of said stator on an outer peripheral side of said stator; and
an admission opening and a discharge opening of said cooling medium connected to said ring-shaped passage, wherein:
said admission opening and said discharge opening are provided at different positions about the circumference;
said ring-shaped passage having a first channel portion that extends from said admission opening to said discharge opening in a first circumferential direction about the circumference of the stator, said ring-shaped passage having a second channel portion that extends from said admission opening to said discharge opening in a second circumferential direction about the circumference of said stator, the second circumferential direction being opposite to the first circumferential direction, said second channel portion being shorter than said first channel portion;
a partition member is provided in said second channel portion of said ring-shaped passage, said partition member interferes with at least a part of the flow of said cooling medium flowing through said second channel portion from said admission opening to said discharge opening in the second circumferential direction;
said partition member is at least partially configured of an elastic material, and abuts an inner surface of said ring-shaped passage; and
said partition member has a main body that longitudinally extends in parallel to an axis center direction of the stator, said main body has a recess that extends in a direction along the circumference of said stator and allows said cooling medium to flow through said second channel portion from said admission opening to said discharge opening in the second circumferential direction.