The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2022
Filed:
Jun. 29, 2020
Amazon Technologies, Inc., Seattle, WA (US);
Kyle Michael Washabaugh, Seattle, WA (US);
Nathaniel James Banka, Seattle, WA (US);
Aleksandar Kojic, Seattle, WA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A current limiter for protecting a motor from overheating. An algorithm is disclosed for dynamically limiting the motor current, such as motors used in robotics. The algorithm uses a thermal model of the motor, which provides a real-time estimate of a coil temperature using instantaneous power consumption of the motor and a thermocouple measurement from the motor's printed circuit board. There are multiple potential outputs from the current limiter algorithm, such as the maximum power that can be consumed without overheating the coils, and an estimate of how long the motor could deliver a specified high torque before overheating.