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. 22, 2017
Filed:
Jun. 10, 2014
Applicant:
Danfoss Power Electronics A/s, Graasten, DK;
Inventor:
Leandro Della Flora, Loves Park, IL (US);
Assignee:
Danfoss Power Electronics A/S, Graasten, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/44 (2006.01); H02M 1/32 (2007.01); H02J 3/38 (2006.01); H02J 3/42 (2006.01); H02M 7/48 (2007.01);
U.S. Cl.
CPC ...
H02M 1/32 (2013.01); H02J 3/383 (2013.01); H02J 3/42 (2013.01); H02M 7/44 (2013.01); H02M 7/48 (2013.01); Y02E 10/563 (2013.01);
Abstract
A method of initiating a grid-tied inverter is described, in which in-rush currents and DC overvoltage conditions are reduced or avoided. The method uses a pulse width modulator to drive the inverter under the control of a voltage feedforward signal such that the inverter output is dependent on the measured grid voltage. Then, an AC current feedback controller is enabled and the pulse width modulator is used to drive the inverter under the control of both the voltage feedforward control signal and the feedback control signal.