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:
Dec. 10, 2024
Filed:
Mar. 20, 2023
Kinetic Technologies International Holdings Lp, Toronto, CA;
Kwei Chung Li, Kowloon, HK;
Feng Zhu, Wanchai, HK;
Kinetic Technologies International Holdings LP, Toronto, CA;
Abstract
Described is a method of controlling operation of a synchronous motor. The method comprises, during constant power/speed motor operation, determining a value of a stator voltage (v) for an orthogonal rotating reference frame of the motor. Comparing the value of the determined stator voltage (v) to a threshold voltage (v), said threshold voltage (v) having a value between that of a maximum stator voltage (v) for a basic speed mode of operation of the motor and that of a maximum stator voltage (v) of the motor closed loop controller. If the determined value of the stator voltage (v) is greater than or equal to the value of the threshold voltage (v), then controlling operation of the motor in a flux weakening mode of operation until a value of a current component (i−Δi) in a d-axis reaches a maximum negative value (−i), or until the value of the stator voltage (v) is less than the value of the threshold voltage (v).