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:
Jan. 12, 2016
Filed:
Sep. 20, 2011
Marc Schaerrer, Bernex, CH;
Marc Schaerrer, Bernex, CH;
LEM Intellectual Property SA, Fribourg, CH;
Abstract
A closed-loop current transducer for measuring a current (Ip) flowing in a primary conductor, the transducer powered by series connected voltage supplies (V_H, V_L) and comprising a magnetic field detector, a signal processing circuit including an amplifier circuit connected to the magnetic field detector, and a compensation coil (WS) connected to the amplifier circuit and configured to generate an opposing magnetic field seeking to cancel a magnetic field generated by the current flowing in the primary conductor. The amplifier circuit comprises a first switched mode power stage configured to drive the magnetic field generator, and a second switched mode power stage configured to balance the currents of the voltage supplies.