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:
Nov. 13, 2018
Filed:
Jul. 20, 2015
Lem Intellectual Property SA, Fribourg, CH;
Wolfram Teppan, Wünnewil, CH;
Davide Azzoni, Meyrin, CH;
LEM INTELLECTUAL PROPERTY SA, Fribourg, CH;
Abstract
Electrical current transducer () of a closed-loop type for measuring a primary current (I) flowing in a primary conductor (), comprising a fluxgate measuring head () and an electronic circuit () including a microprocessor () for digital signal processing. The measuring head includes a secondary coil () and a fluxgate detector () comprising an excitation coil and a magnetic material core. The electronic circuit comprises an excitation coil drive circuit () configured to generate an alternating excitation voltage to supply the excitation coil with an alternating excitation current (I), the secondary coil () connected in a feedback loop () of the electronic circuit to the excitation coil drive circuit (), the electronic circuit further comprising a ripple compensation circuit () configured to compensate for a ripple signal generated by the alternating excitation voltage.