公开(公告)号：US20220368184A1

公开(公告)日：2022-11-17

申请号：US17317088

申请日：2021-05-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Song He ,  Peng Zhang ,  Michael C. Muir ,  Yew Sum Leong

IPC: H02K1/28 ,  H02K1/27 ,  H02K15/02

Abstract: An electric machine may include a rotor having a notch at each pole wherein each notch is skewed by some mechanical angle. Notches may fluidly couple one end of the rotor to the other end of the rotor and provide pumping functionality for fluid therein.

公开(公告)号：US20210184520A1

公开(公告)日：2021-06-17

申请号：US16710787

申请日：2019-12-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Peng Zhang ,  Song He ,  Michael C. Muir

IPC: H02K1/24 ,  H02K7/00 ,  H02K1/16 ,  H02K1/27

Abstract: A rotor assembly for an electric machine, e.g., of an electrified powertrain, includes a rotor having inner and outer diameter surfaces, and a rotor shaft connected to and surrounded by the rotor. The rotor has equally-spaced rotor magnetic poles each having a quadrature-axis (“q-axis”) and a pair of direct-axes (“d-axes”). At each of magnetic pole of the rotor, the rotor defines at least three arcuate notches, including a center notch bisected by the q-axis and a pair of additional arcuate notches symmetrically flanking the center notch. The rotor may include embedded permanent magnets, which may be arranged in a dual V-shaped configuration. Each additional notch may be positioned within a sweep of a top-layer opening angle of the magnets. The center notch and/or the pair of additional notches may define tangentially-continuous fillets which smoothly transition the notch into the outer diameter surface.

公开(公告)号：US11594921B2

公开(公告)日：2023-02-28

申请号：US16710787

申请日：2019-12-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Peng Zhang ,  Song He ,  Michael C. Muir

IPC: H02K1/24 ,  H02K1/16 ,  H02K1/27 ,  H02K7/00 ,  H02K1/276 ,  H02K29/03

Abstract: A rotor assembly for an electric machine, e.g., of an electrified powertrain, includes a rotor having inner and outer diameter surfaces, and a rotor shaft connected to and surrounded by the rotor. The rotor has equally-spaced rotor magnetic poles each having a quadrature-axis (“q-axis”) and a pair of direct-axes (“d-axes”). At each of magnetic pole of the rotor, the rotor defines at least three arcuate notches, including a center notch bisected by the q-axis and a pair of additional arcuate notches symmetrically flanking the center notch. The rotor may include embedded permanent magnets, which may be arranged in a dual V-shaped configuration. Each additional notch may be positioned within a sweep of a top-layer opening angle of the magnets. The center notch and/or the pair of additional notches may define tangentially-continuous fillets which smoothly transition the notch into the outer diameter surface.