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:
Aug. 18, 2009
Filed:
May. 25, 2006
Applicant:
Dorin O. Neacsu, Westford, MA (US);
Inventor:
Dorin O. Neacsu, Westford, MA (US);
Assignee:
Azure Dynamics Corp., Woburn, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/00 (2006.01); H02M 3/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
Non-linear frequency droop control for isochronous frequency operation of parallel inverters includes generating a droop constant corresponding to the power level of the given inverter for maintaining the predetermined frequency range of the given inverter; generating the droop from the given inverter power level and the droop constant and calculating in response to the droop, the incremental shift in the output voltage waveform of a given inverter operating in a predfreytermined limited frequency range to enable current sharing among the inverters.