公开(公告)号：US09935513B2

公开(公告)日：2018-04-03

申请号：US14769851

申请日：2013-04-22

Applicant: Mitsubishi Electric Corporation

Inventor： Hirohisa Yokota ,  Takuma Sasai ,  Moriyuki Hazeyama ,  Shinsuke Kayano

IPC: H02K1/32 ,  H02K1/27

CPC classification number: H02K1/32 ,  H02K1/2766

Abstract: According to an electric motor, a cooling hole is formed outside of a circular arc-like region having an intersection between extension lines from inner side surfaces of adjacent permanent magnets as a center of the circular arc-like region and a distance between the intersection and an intermediate point on the side surface of the permanent magnet as a radius of the circular arc-like region. Thus, heat generation by a magnetic resistance due to the cooling hole is suppressed to improve efficiency.

公开(公告)号：US09712012B2

公开(公告)日：2017-07-18

申请号：US14252385

申请日：2014-04-14

Applicant: Mitsubishi Electric Corporation

Inventor： Hirohisa Yokota ,  Atsushi Sakaue ,  Hironori Tsuiki ,  Tatsuro Hino ,  Shinkichi Sawa ,  Masashi Nakamura ,  Shogo Okamoto

IPC: H02K3/34 ,  H02K3/24 ,  H02K3/12 ,  H02K3/38

CPC classification number: H02K3/24 ,  H02K3/12 ,  H02K3/38

Abstract: An armature winding includes a plurality of distributed winding bodies that are each produced by winding a single conductor wire that is insulated, jointless, and continuous, and that has a constant cross-sectional area perpendicular to a longitudinal direction, the conductor wires include first through third coil end portions that link first through fourth rectilinear portions and first through fourth rectilinear portions, and are formed such that radial widths w′ of the first through fourth rectilinear portions are wider than radial widths w of the first through third coil end portions, and first gaps are formed between radially adjacent coil end portions to allow a cooling medium to pass through the first gaps.