公开(公告)号：US11677343B1

公开(公告)日：2023-06-13

申请号：US17710359

申请日：2022-03-31

Applicant: Amazon Technologies, Inc.

Inventor： Xiaoqi Wang ,  Marco Antonio De Barros Ceze ,  Evan Matthew Francis ,  Marc Ian Feifel ,  Frederic Pierre Lacaux ,  Michael Szmuk

IPC: H02P6/182 ,  H02P21/18 ,  B64D27/24 ,  B64D45/00

CPC classification number: H02P6/182 ,  B64D27/24 ,  H02P21/18 ,  B64D2045/0085

Abstract: Systems and methods for sensorless motor control may include a back EMF (electromotive force) observer, an adaptive EMF filter, magnitude compensation, hybrid rotor position and speed determination, rotor position and speed blending, and angle compensation. In order to provide accurate and reliable rotor position and speed estimations for a motor over a wide and varied range of speeds, at low speeds, during speed reversals, and/or in the presence of external forces, loads, or torques, the sensorless motor control may utilize a hybrid rotor position and speed determination that leverages both angle-based and magnitude-based methods. Further, the outputs of the two methods may be blended based on a shaping function to generate a final estimated rotor position and speed. Then, the motor may be more accurately and reliably controlled based on the final estimated rotor position and speed.