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:
Feb. 06, 2018
Filed:
Apr. 29, 2015
Suzan Eren, Kingston, CA;
Majid Pahlevaninezhad, Kingston, CA;
Shangzhi Pan, Kingston, CA;
Praveen Jain, Kingston, CA;
Suzan Eren, Kingston, CA;
Majid Pahlevaninezhad, Kingston, CA;
Shangzhi Pan, Kingston, CA;
Praveen Jain, Kingston, CA;
SPARQ SYSTEMS INC., Kingston, Ontario, CA;
Abstract
Systems, methods, and devices which eliminate the DC current from the output of grid-connected inverters. A current controller is provided which interfaces with a grid-connected DC/AC inverter. The current controller uses a nonlinear adaptive filter which receives, as input, the output current of the inverter along with grid current frequency. The nonlinear adaptive filter estimates the DC value of the grid current and, in conjunction with an integrator, removes this DC current component. This is done by adjusting the duty cycle of the grid-connected inverter.