EP 2237292 A2 20101006 - Symmetrical induction coils, in particular for proximity sensors
Title (en)
Symmetrical induction coils, in particular for proximity sensors
Title (de)
Symmetrische induktive Bauelemente, insbesondere für Näherungssensoren
Title (fr)
Inductance symetrique, en particulier pour detecteurs de proximite
Publication
Application
Priority
FR 0901638 A 20090403
Abstract (en)
The coil (20) has a front face (28) and an opposite face including a package of conductive wires (22) between winding ends (26A, 26B) with superposition of internal winding layers (24i). The winding ends are located on an external winding layer (24n). The winding ends are located at a center of the coil between the front and opposite faces such that the external layer includes two symmetrical portions composed of equal number of wire turns wound in two opposite directions. Independent claims are also included for the following: (1) a proximity detection device comprising an electronic circuit for determining distance of a metallic object with respect to a frontal face of an induction coil (2) a method for fabrication of an induction coil.
Abstract (fr)
Une technique de bobinage permet d'obtenir une inductance (20) symétrique, de sorte qu'un capteur de proximité inductif (40) l'utilisant ait une immunité aux champs électromagnétiques optimisée. La dernière couche (24 n ) de l'inductance (20) est rendue symétrique, avec les deux extrémités (26A, 26B) de l'enroulement débouchant sensiblement au centre de l'inductance (20), de façon à restreindre au maximum l'influence néfaste des couplages capacitifs avec le boîtier (46).
IPC 8 full level
H01F 41/06 (2006.01)
CPC (source: EP)
H01F 41/086 (2016.01)
Citation (applicant)
JP 2007165757 A 20070628 - GOTO DENSHI KK
Designated contracting state (EPC)
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 SE SI SK SM TR
Designated extension state (EPC)
AL BA ME RS
DOCDB simple family (publication)
EP 2237292 A2 20101006; EP 2237292 A3 20110330; EP 2237292 B1 20120509; AT E557405 T1 20120515; ES 2383511 T3 20120621; FR 2944133 A1 20101008
DOCDB simple family (application)
EP 10354015 A 20100326; AT 10354015 T 20100326; ES 10354015 T 20100326; FR 0901638 A 20090403