公开(公告)号：US10164562B2

公开(公告)日：2018-12-25

申请号：US15485293

申请日：2017-04-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anno Yoo ,  Sung-Yoon Jung

IPC: H02P23/00 ,  H02P27/08 ,  H02M7/5387

Abstract: A method of controlling an alternating current (AC) motor includes following steps: (a) providing a voltage to the AC motor, wherein the voltage is a pulse-width modulation (PWM) signal, which is represented by a voltage reference vector; (b) determining that the voltage reference vector is in a distortion region; and (c) in response to determining that the voltage reference vector is in the distortion region, modifying, via a controller, the PWM signal by updating the voltage reference vector every half switching period to avoid the distortion region.

公开(公告)号：US09973120B1

公开(公告)日：2018-05-15

申请号：US15492644

申请日：2017-04-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dwarakanath V. Simili ,  Anno Yoo ,  Yo Chan Son

IPC: H02P1/00 ,  H02P6/08

CPC classification number: H02P6/08

Abstract: An electric machine assembly includes an electric machine having a stator configured to have a stator current and a controller configured to receive a torque command (T). The controller stores a modulation flag (Fm) and a six step active flag (FS), each having a respective status. The controller has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of controlling a six step pulse width modulation operation in the assembly. The controller is programmed to determine the respective status of a six step active flag (FS) based at least partially on the torque command (T) and the respective status of the modulation flag (Fm). The controller is configured to control at least one operating parameter of the electric machine based at least partially on the respective status of the six step active flag (FS).