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:
Jul. 19, 2016
Filed:
Jan. 26, 2012
Applicants:
Stephen J. Mountain, Derby, GB;
Ellis F H Chong, Derby, GB;
Inventors:
Stephen J. Mountain, Derby, GB;
Ellis F H Chong, Derby, GB;
Assignee:
ROLLS-ROYCE PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 16/04 (2006.01); H02K 49/00 (2006.01); H02P 9/14 (2006.01); H02K 49/10 (2006.01); H02K 7/18 (2006.01); H02P 6/00 (2016.01);
U.S. Cl.
CPC ...
H02K 16/04 (2013.01); H02K 7/1823 (2013.01); H02K 49/102 (2013.01); H02P 6/005 (2013.01); H02P 9/14 (2013.01);
Abstract
An electromagnetic machine, comprising: a first stator winding having a first number of pole pairs; a second stator winding having a second number of pole pairs which is different to the first number of pole pairs; and, a modulator having a plurality of pole pieces arranged relative to the first and second stator windings so as to modulate the electromagnetic fields produced by the first and second stator windings, thereby matching harmonic spectra of the first and second stator windings.