EP 3900153 A1 20211027 - METHOD AND APPARATUS FOR DETECTING ELECTRICALLY CONDUCTIVE FOREIGN BODIES DURING INDUCTIVE ENERGY TRANSMISSION
Title (en)
METHOD AND APPARATUS FOR DETECTING ELECTRICALLY CONDUCTIVE FOREIGN BODIES DURING INDUCTIVE ENERGY TRANSMISSION
Title (de)
VERFAHREN UND VORRICHTUNG ZUR DETEKTION VON ELEKTRISCH LEITFÄHIGEN FREMDKÖRPERN BEI DER INDUKTIVEN ENERGIEÜBERTRAGUNG
Title (fr)
PROCÉDÉ ET DISPOSITIF DE DÉTECTION DE CORPS ÉTRANGERS ÉLECTRIQUEMENT CONDUCTEURS LORS DE LA TRANSMISSION D'ÉNERGIE INDUCTIVE
Publication
Application
Priority
EP 2018086201 W 20181220
Abstract (en)
[origin: WO2020125994A1] In a method and an apparatus for detecting electrically conductive foreign bodies during inductive energy transmission between a primary coil (1) and a secondary coil (2), at least one sensor coil (5) is arranged between the primary coil (1) and the secondary coil (2), and a current flowing in the sensor coil (5) due to the induced voltage during the energy transmission is detected and evaluated. In this case, the sensor coil (5) is connected to at least one capacitor to form a resonant circuit which is matched to the excitation frequency of the primary coil (1). 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 (4) between the primary coil (1) and the secondary coil (2). A high degree of sensitivity in relation to small electrically conductive foreign bodies within the energy transmission path is also achieved by means of the method and the apparatus.
IPC 8 full level
H02J 50/12 (2016.01); H02J 50/60 (2016.01)
CPC (source: EP US)
B60L 53/124 (2019.02 - US); H02J 7/00711 (2020.01 - US); H02J 50/10 (2016.02 - US); H02J 50/12 (2016.02 - EP); H02J 50/60 (2016.02 - EP US); Y02T 10/70 (2013.01 - EP); Y02T 10/7072 (2013.01 - EP); Y02T 90/14 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020125994 A1 20200625; EP 3900153 A1 20211027; US 11894696 B2 20240206; US 2022029470 A1 20220127
DOCDB simple family (application)
EP 2018086201 W 20181220; EP 18833421 A 20181220; US 201817415089 A 20181220