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. 14, 2007
Filed:
Oct. 06, 2003
Wim Teulings, Fontenilles, FR;
Jean-louis Lando, Saverdun, FR;
Didier Puech, Toulouse, FR;
Siemens VDO Automotive, Toulouse Cedex, FR;
Abstract
A magnetic field generated by a primary winding () in which the current (i) to be measured flows is balanced by a magnetic field of opposing direction generated by a secondary winding () in which a compensating current (i) flows. The device includes a member () sensitive to the field resulting from the addition of the magnetic fields of opposing directions to regulate the compensating current (i) in closed loop mode. According to the invention, the, sensitive member () is sensitive only to the direction of the resultant field and, in return, controls the reversal of the direction of circulation of the compensating current (i) in the secondary winding (). This sensitive member () can be formed by a Hall effect probe with bipolar output signal. The device is suitable for the measurement of a current inautomotive electronics.