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:
Feb. 06, 2024
Filed:
Dec. 20, 2018
Universität Stuttgart, Stuttgart, DE;
UNIVERSITÄT STUTTGART, Stuttgart, DE;
Abstract
In a method and an apparatus for detecting electrically conductive foreign bodies during inductive energy transmission between a primary coil () and a secondary coil (), at least one sensor coil () is arranged between the primary coil () and the secondary coil (), and a current flowing in the sensor coil () due to the induced voltage during the energy transmission is detected and evaluated. In this case, the sensor coil () is connected to at least one capacitor to form a resonant circuit which is matched to the excitation frequency of the primary coil (). The phase position of the current in the resonant circuit in relation to a reference signal is then used to determine whether there are electrically conductive foreign bodies () between the primary coil () and the secondary coil (). A high degree of sensitivity, also in relation to small electrically conductive foreign bodies within the energy transmission path, is achieved by means of the method and the apparatus.