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:
Sep. 05, 2017
Filed:
Jan. 29, 2016
Applicant:
Raytheon Company, Waltham, MA (US);
Inventor:
David C. Lewis, Waltham, MA (US);
Assignee:
Raytheon Company, Waltham, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 7/44 (2006.01); H02M 7/5387 (2007.01); H02M 1/08 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 7/53871 (2013.01); H02M 1/08 (2013.01); H02M 2001/0009 (2013.01);
Abstract
An NPC converter is controlled by estimating current flow during the short vector periods of a space vector modulation drive signal. The current estimation is used to close a first order inner current regulator loop that steers current to either the upper capacitor or the lower capacitor of a DC link. An outer voltage regulator measures the voltage imbalance across the capacitors and drives the inner current loop. By managing the associated duty cycle of each vector a bias current is formed that balances the capacitor voltages.