公开(公告)号：US11581835B1

公开(公告)日：2023-02-14

申请号：US17360946

申请日：2021-06-28

Applicant: Amazon Technologies, Inc.

Inventor： Lizon Maharjan ,  Xiaoqi Wang

IPC: H02P21/16 ,  H02P21/14 ,  H02P21/18 ,  H02P21/22

Abstract: Techniques and apparatus for determining the temperature of a permanent magnet on a rotor of an electrical motor. An example techniques involves determining a first set of parameters for controlling the electrical motor. A temperature of the rotor during a runtime of the electrical motor is determined, based at least in part on the first set of parameters and a first back-electromotive force (back-emf) associated with the electrical motor. A first estimate of a magnetic flux of the permanent magnet is determined based on the temperature of the rotor. An operation of the electrical motor is controlled based at least in part on the first estimate of the magnetic flux of the permanent magnet.

公开(公告)号：US12149193B1

公开(公告)日：2024-11-19

申请号：US17934108

申请日：2022-09-21

Applicant: Amazon Technologies, Inc.

Inventor： Andrew Lueneburg ,  Xiaoqi Wang ,  Tausif Husain ,  Frederic Pierre Lacaux

IPC: H02P27/06 ,  B60L50/51 ,  B64D27/24 ,  B64U50/19

Abstract: Described are systems and methods for providing a centralized inverter architecture that incorporates multiple inverters co-located in a single integrated power core. Exemplary embodiments of the present disclosure can provide an exemplary power electronics system that includes integrated power core units having multiple inverters co-located in a centralized location. The integrated power cores can enable compute topologies that enable communication between the inverters and coordinated operation of the inverters. The integrated power cores can also be configured as a single line replaceable unit (LRU) to facilitate efficient repair, maintenance, and/or replacement of each integrated power core.

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.

公开(公告)号：US12184215B1

公开(公告)日：2024-12-31

申请号：US17821313

申请日：2022-08-22

Applicant: Amazon Technologies, Inc.

Inventor： Xiaoqi Wang ,  Andrew Lueneburg ,  Frederic Pierre Lacaux ,  Sheverria Antony Aikens

IPC: H02P29/028 ,  H02K11/33

Abstract: Described are systems and methods for providing fault tolerant drivers for electric motors. Embodiments of the present disclosure may provide a single power electronics unit and/or ESC that is configured to drive more than one electric motor. According to exemplary embodiments, each power electronics unit and/or ESC may be connected to more than one electric motor (e.g., three electric motors, etc.) and each power electronics unit and/or ESC may be configured to drive and/or control a single phase of multiple electric motors. This can facilitate two-phase mode operation in the event of a faulty power electronics unit and/or ESC, thereby facilitating continued operation of the affected electric motors. Exemplary embodiments of the present disclosure can also provide alternate modes of operation for the electric motors that are operating in two-phase mode to mitigate thermal stresses that may be experienced by the power electronics and/or the electric motors during two-phase operation.

公开(公告)号：US12151565B1

公开(公告)日：2024-11-26

申请号：US17934068

申请日：2022-09-21

Applicant: Amazon Technologies, Inc.

Inventor： Frederic Pierre Lacaux ,  Xiaoqi Wang ,  Jianqi Shang ,  Larry W. Juang ,  Andrew Lueneburg

IPC: B60L3/00 ,  B64D27/24 ,  B64U50/19

Abstract: Described are systems and methods for providing a fault tolerant electrical power system that is configured to continue operating through various fault and/or failure conditions, so as to withstand certain single points of fault and/or failure conditions. Exemplary embodiments of the present disclosure can provide an exemplary electrical power system that includes various components that are electrically coupled to a shared direct current (DC) bus via protection devices that are configured to isolate the various components in the event of certain fault and/or failure conditions. Additionally, the exemplary electrical power system can also include a high-impedance midpoint grounding connection configured to shift the voltages of the shared DC bus in view of certain fault and/or failure conditions, as well as introducing certain separations (e.g., physical and/or electrical) to mitigate the possibility of certain faults and/or failure conditions.

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.