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:
May. 21, 2024
Filed:
Nov. 24, 2021
The Boeing Company, Chicago, IL (US);
Lijun Gao, Renton, WA (US);
Shengyi Liu, Sammamish, WA (US);
THE BOEING COMPANY, Arlington, VA (US);
Abstract
A direct drive electrically-geared turbofan is provided via a first magnetic gearbox assembly connected to a fan of a turbofan engine; a second magnetic gearbox assembly connected to a spool shaft of the turbofan engine; and a speed controller configured to adjust a rotational speed of the fan based on a rotational speed of the spool shaft by selectively coupling and decoupling the first magnetic gearbox assembly with the second magnetic gearbox assembly. In various aspects, the first or second magnetic gearbox assembly includes a permanent magnet array, while a different one of the first or second magnetic gearbox assemblies includes a rotor winding separated from the permanent magnet array by an air gap; and the speed controller is configured to selectively couple and decouple the first and second magnetic gearbox assemblies with each other via controlling a switch in a winding circuit with the rotor winding.