公开(公告)号：US11967818B1

公开(公告)日：2024-04-23

申请号：US17708120

申请日：2022-03-30

Applicant: Amazon Technologies, Inc.

Inventor： Lizon Maharjan ,  Frederic Pierre Lacaux ,  Dean Joseph Brestel ,  Xiaoqi Wang ,  Andrew Lueneburg ,  Marc Ian Feifel

IPC: H02H7/085 ,  B64C39/02 ,  B64D27/24 ,  B64D31/00 ,  H02H7/08 ,  B64U50/19

CPC classification number: H02H7/0811 ,  B64C39/024 ,  B64D27/24 ,  B64D31/00 ,  B64U50/19

Abstract: Described are systems and methods for monitoring, detecting, and/or protecting various systems of an aerial vehicle, such as an unmanned aerial vehicle (UAV). Embodiments of the present disclosure can provide a multi-tiered system to provide monitoring, detection, and/or initiation of protection protocols in response to detected faults in connection with the electronics associated with UAV systems, such as the motor drive and/or control systems that may drive the propulsion systems of the UAV.

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.