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. 17, 2024
Filed:
Jun. 30, 2022
Applicant:
Enphase Energy, Inc., Petaluma, CA (US);
Inventor:
Michael J. Harrison, Petaluma, CA (US);
Assignee:
Enphase Energy, Inc., Petaluma, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/44 (2007.01); H02M 1/00 (2006.01); H02M 7/48 (2007.01);
U.S. Cl.
CPC ...
H02M 1/44 (2013.01); H02M 1/0085 (2021.05); H02M 7/4815 (2021.05);
Abstract
Methods and apparatus for active EMI cancellation in a switch mode power supply are provided herein. For example, an apparatus comprises an active EMI cancellation circuit coupled to a switch mode power supply circuit comprising an isolation transformer, wherein the active EMI cancellation circuit is positioned such that current flow through an EMI coupling capacitor substantially matches displacement current flow through a primary-to-secondary interwinding capacitance of the isolation transformer.