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:
Aug. 19, 2025
Filed:
Nov. 08, 2023
Kabushiki Kaisha Toyota Jidoshokki, Aichi-ken, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Aichi-Ken, JP;
Abstract
An electric motor includes processing circuitry. The processing circuitry estimates the position of a rotor in a mode selected from an induced voltage mode and a harmonic superimposition mode. The induced voltage mode is a mode of estimating the position of the rotor based on an induced voltage that is generated in three-phase coils. The harmonic superimposition mode is a mode of estimating the position of the rotor by superimposing a harmonic on a command value. The processing circuitry estimates the position of the rotor using the induced voltage mode when the output voltage is greater than or equal to a predetermined threshold value and estimates the position of the rotor using the harmonic superimposition mode when the output voltage is less than the threshold value.