公开(公告)号：US11126440B1

公开(公告)日：2021-09-21

申请号：US16911644

申请日：2020-06-25

Applicant: Amazon Technologies, Inc.

Inventor： Lalithkumar Rajendran ,  Jun woo Park ,  Garrick Chow ,  Austin Bryant ,  Yi Li ,  Hua Wang

IPC: G06F9/4401 ,  G01K3/00 ,  G06F13/10 ,  G06F13/42 ,  G01K7/22 ,  G06F1/20

Abstract: Techniques for identifying thermal critical conditions in devices with multiple SoCs, and coordinating the resetting and rebooting of the SoCs to recover from the thermal critical conditions are described herein. A device may include a first SoC that monitors a first temperature sensor, and a second SoC that monitors a second temperature sensor, to determine whether temperatures in the device indicate thermal critical conditions. The second SoC may determine that a temperature determined using the second temperature sensor is above a threshold indicating a thermal critical condition, and may provide an indication to the first SoC that the temperature is above the threshold. The first SoC may detect the indication, and the first SoC and second SoC may each reset to allow the device to cool down. The first SoC and second SoC may then coordinate rebooting once the thermal critical condition is no longer detected in the device.

公开(公告)号：US11573647B1

公开(公告)日：2023-02-07

申请号：US17028385

申请日：2020-09-22

Applicant: Amazon Technologies, Inc.

Inventor： Hua Wang ,  Yi Li ,  Abhay Gupta ,  Ehsan Omidi ,  Shichang Liu ,  Kevin Zhang ,  Sanket Parikh ,  Anchit Rastogi

IPC: G06F3/03 ,  H02P3/06 ,  G06F3/01 ,  H02P7/025 ,  H02P7/06 ,  H02P7/28 ,  H02P6/28

Abstract: Techniques for controlling operations of a motor based on position errors are described. In an example, a user device sends an amount of electrical current to the motor to cause the motor to move. The user device also determines the motor is in position for a time interval despite the amount of electrical current. Based at least one the time interval and the amount of electrical current, the user device determines a position difference associated with a target position and a measured position of the motor during the time interval, and reduces the amount of electrical current based at least in part on the time interval.