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. 20, 2016
Filed:
May. 13, 2014
Applicant:
Gary William Box, Golden Valley, MN (US);
Inventor:
Gary William Box, Golden Valley, MN (US);
Assignee:
GBOX, LLC, Golden Valley, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P 9/10 (2006.01); H02P 9/14 (2006.01); H02P 9/30 (2006.01); H02P 25/02 (2016.01); H02P 11/00 (2006.01); H02H 7/06 (2006.01); H01F 38/18 (2006.01);
U.S. Cl.
CPC ...
H02P 9/302 (2013.01); H02P 25/026 (2013.01); H02P 25/03 (2016.02); H01F 38/18 (2013.01);
Abstract
A brushless field exciter for wound synchronous machines that uses the resonance of the leakage inductance and a capacitor in a resonant field exciter to transfer energy to the rotating field winding. By resonating at frequencies greater than 50 kHz, this exciter reduces the overall size and weight of synchronous wound field motors at all power levels and extends the practical and economic power limits of synchronous wound field machines down to low integral and fractional HP applications, eliminating the permanent magnets now used in high efficiency motors and generators in that power range.