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. 03, 2026
Filed:
Feb. 02, 2024
Stmicroelectronics International N.v., Geneva, CH;
Andrea Spampinato, Mascalucia, IT;
Sebastiano Yuri Ciardo, Mascalucia, IT;
Gianluigi Forte, Camporotondo Etneo, IT;
STMICROELECTRONICS INTERNATIONAL N.V., Geneva, CH;
Abstract
In accordance with various embodiments of the present disclosure, a system for indirectly measuring an angular position and/or a rotational speed of an electrical machine having a rotatable shaft, a wound rotor, and a stator having three or more phases is provided. In some embodiments, the system comprises a switching converter adapted to provide a current to the wound rotor that has a component detectable in the stator, current sensing circuitry adapted to detect a stator current, filtering circuitry adapted to extract the detectable component, and control circuitry for (i) transforming the extracted detectable component into two, 90 degree displaced currents, (ii) demodulating the two, 90 degree displaced currents to obtain an envelope waveform for each of the two, 90 degree displaced currents, and (iii) analyzing the envelope waveforms for the two, 90 degree displaced currents to determine an angular position and/or a rotational speed of the rotatable shaft.