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:
Dec. 06, 2022
Filed:
Apr. 30, 2020
Rolls-royce Plc, London, GB;
Adegoke Gbadeyan, Derby, GB;
Ellis F H Chong, Derby, GB;
ROLLS-ROYCE PLC, London, GB;
Abstract
A radial flux rotary electric machine having an exterior-rotor configuration is shown. The machine has a permanent-magnet rotor comprising permanent magnets in a Halbach array, and an air-cored stator interior to the rotor having teeth defining tapered slots and distributed windings around the teeth to form coils in a double-layer arrangement, the windings being comprised of a plurality of phase windings. For each tooth T having a slot Son one side thereof and a slot Son another side thereof, a coil side Cof a phase winding is arranged to occupy a radially inner layer of the slot Sand a coil side Cof the same phase winding is arranged to occupy a radially outer layer of the slot S, wherein the coil side Chas a smaller circumferential dimension and a larger radial dimension than the coil side C