公开(公告)号：US09755567B2

公开(公告)日：2017-09-05

申请号：US14932603

申请日：2015-11-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dwarakanath V Simili ,  Jihoon Jang

IPC: H02P23/14 ,  H02P29/00 ,  H02P21/14

CPC classification number: H02P21/141 ,  B60L2220/50 ,  H02P29/032 ,  H02P29/60 ,  H02P29/64 ,  H02P29/662 ,  H02P2207/05

Abstract: An electric machine assembly has an electric machine having a stator and a rotor. The rotor has a rotor temperature and is configured to rotate at a rotor speed (ω). The stator has stator windings at a stator winding temperature (tS) and the electric machine defines a number of pole pairs (P). A controller is operatively connected to the electric machine and is configured to receive a torque command (T*). The controller has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for determining a total permanent magnetic flux (ψT) as a function of the rotor temperature. Execution of the instructions by the processor causes the controller to determine a high-speed magnetic flux factor (ψH) and a low-speed magnetic flux factor (ψL).

公开(公告)号：US09647602B1

公开(公告)日：2017-05-09

申请号：US14932613

申请日：2015-11-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dwarakanath V Simili ,  Jihoon Jang ,  Sinisa Jurkovic

IPC: H02P7/00 ,  H02P29/00 ,  H02P21/14 ,  G01R31/34 ,  H02P6/18 ,  H02P9/00

CPC classification number: G01R31/343 ,  H02P21/14 ,  H02P21/143 ,  H02P23/14 ,  H02P29/64

Abstract: An electric machine assembly includes an electric machine having a stator and a rotor. The stator has stator windings at a stator winding temperature (tS) and the rotor is configured to rotate at a rotor speed (ω). A controller is operatively connected to the electric machine and has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for determining stator winding resistance. The controller is configured to determine a high-speed resistance factor (rH) which is based at least partially on the torque command (T*), the stator winding temperature (tS), the rotor speed (ω), a characterized torque error and the number of pole pairs (P). The controller may determine a total resistance value (R) based on a weighting factor (k), the high-speed resistance factor (rH) and the low-speed resistance factor (rL).