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. 16, 2016
Filed:
Mar. 04, 2014
Applicant:
Abb Inc., Cary, NC (US);
Inventors:
Douglas Karraker, New Berlin, WI (US);
Alpo Vallinmaki, Mukwonago, WI (US);
Assignee:
ABB INC., Cary, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 15/16 (2006.01); G01R 19/00 (2006.01); H02M 3/335 (2006.01);
U.S. Cl.
CPC ...
H02M 3/33523 (2013.01); G01R 15/16 (2013.01); H02M 3/335 (2013.01);
Abstract
A voltage measuring device includes an input configured to be coupled to a secondary of an inductive coupling of a DC to DC voltage converter. A switch coupled to the input forms a discharge path parallel to a sampling capacitor dependent on the voltage at the input equaling or exceeding a first voltage threshold and independent of an output voltage at the output of the device. The sampling capacitor is coupled to the output. A rectifier in series with the sampling capacitor is biased to conduct upon the input voltage, minus the output voltage, equaling or exceeding a second voltage.