公开(公告)号：US10418870B2

公开(公告)日：2019-09-17

申请号：US15364305

申请日：2016-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jingchuan Li ,  Khwaja M. Rahman ,  Robert T. Dawsey

IPC: H02K1/27

Abstract: A synchronous reluctance motor includes a stator and a rotor. The rotor is configured to rotate relative to the stator about a rotational axis. The rotor is spaced apart from the stator to define an air gap between the stator and the rotor and includes a rotor core defines an outermost rotor surface and an innermost rotor surface opposite the innermost rotor surface. The rotor core includes a plurality of ribs separating rotor cavities from each other and includes a plurality of rotor bridges separating the air gap and the rotor cavities. Permanent magnets are each disposed in one of the rotor cavities. The magnet surface area of the permanent magnets is less than cavity surface area of the rotor cavities. Each of the permanent magnets is adjacent to the outermost rotor surface to maximize magnetic saturation at the ribs and the rotor bridges.

公开(公告)号：US20180367005A1

公开(公告)日：2018-12-20

申请号：US15622391

申请日：2017-06-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Khwaja M. Rahman ,  Jingchuan Li

IPC: H02K3/28 ,  H02K3/12

Abstract: A stator assembly includes a plurality of stator slots, including a first stator slot defining a slot axis. A plurality of conductors is at least partially positioned in the first stator slot and forms a winding set. The assembly is characterized by uneven conductor lengths and a combination of series and parallel connections in the coil sets of the winding set. The winding set includes at least one coil set with the conductors connected in series and at least one coil set with the conductors connected in parallel. At least one of the conductors extends a first conductor length along the slot axis and at least another of conductors extends a second conductor length along the slot axis. The first conductor length is different from the second conductor length. The assembly results in reduced winding alternating current losses, enhanced motor torque and additional turn count options.

公开(公告)号：US20180152066A1

公开(公告)日：2018-05-31

申请号：US15364305

申请日：2016-11-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jingchuan Li ,  Khwaja M. Rahman ,  Robert T. Dawsey

IPC: H02K1/27

CPC classification number: H02K1/2766

Abstract: A synchronous reluctance motor includes a stator and a rotor. The rotor is configured to rotate relative to the stator about a rotational axis. The rotor is spaced apart from the stator to define an air gap between the stator and the rotor and includes a rotor core defines an outermost rotor surface and an innermost rotor surface opposite the innermost rotor surface. The rotor core includes a plurality of ribs separating rotor cavities from each other and includes a plurality of rotor bridges separating the air gap and the rotor cavities. Permanent magnets are each disposed in one of the rotor cavities. The magnet surface area of the permanent magnets is less than cavity surface area of the rotor cavities. Each of the permanent magnets is adjacent to the outermost rotor surface to maximize magnetic saturation at the ribs and the rotor bridges.