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:
Feb. 24, 2026
Filed:
Jun. 01, 2022
Mitsubishi Electric Corporation, Tokyo, JP;
Guilherme Bueno Mariani, Rennes, FR;
Nicolas Voyer, Rennes, FR;
Gianmario Pellegrino, Turin, IT;
Anantaram Varatharajan, Turin, IT;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A method and a device inject a high frequency current vector which has a fixed angle with the measured current vector flowing in the machine. The method: measures the motor current vector, determines a projection value of the motor current on an axis that is orthogonal to a direction having the fixed angle with the measured current vector, demodulates the high frequency variations of the projection value using a first high frequency demodulation signal, determines at least a first angle from the demodulated high frequency variation, determines the injection voltage vector at least from the first angle, a predetermined voltage and a second high frequency modulating signal, the second high frequency modulating signal having the same frequency as the first high frequency demodulating signal and a phase difference with the first high frequency demodulating signal that is equal to π/2.