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:
Jan. 06, 2026
Filed:
Aug. 15, 2024
Rolls-royce Plc, London, GB;
Paul W Hisgett, Solihull, GB;
Mark A Tanner, Birmingham, GB;
ROLLS-ROYCE plc, London, GB;
Abstract
The present disclosure relates to an electric drive apparatuscomprising an inverter system, an electric motorand a controller. The electric motorincludes a rotorand a plurality of phase windings. The inverter systemis configured to provide a respective current waveformto each of the phase windingsof the electric motor. Each current waveformis defined by a group of electrical characteristics including: a frequency composition, a phase shift relative to a reference waveform, and an amplitude. For one or more of the current waveforms, the controlleris configured to control one or more of the group of electrical characteristics to cause a periodically varying torque to be applied to the rotor