Arrangement and method for contactless energy transmission with a coupling-minimized matrix of planar transmission coils

• US 20140091640A1
• Filed: 05/03/2012
• Published: 04/03/2014
• Est. Priority Date: 05/03/2011
• Status: Active Grant

• Current Assignee: Phoenix Contact GmbH & Company KG
• Original Assignee: Phoenix Contact GmbH & Company KG
• Inventors: Scholz, Peter-Dominik, Galliardt, Artjom
• Granted Patent: US 9,953,761 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

The invention relates to an arrangement and a method for contactless energy transmission by means of induction. There are a plurality of coils arranged in a matrix, the coils having at least one conductor that surrounds a central axis of the coil at least once in one turn. The central axis stands vertically on the surface surrounded by the conductor in the geometric center of area of the surrounded surface. The coils are arranged adjacent to one another in a planar unit that extends in a first dimension, in a second dimension, and in a third dimension. The extension of the planar unit in the first dimension and in the second dimension is significantly greater than in the third dimension. The central axis of each coil stands at least locally at least nearly perpendicular to the surface spanned by the first dimension and the second dimension. The coils are also arranged in a regular manner within the planar unit in rows and/or columns such that each coil has at least two or three immediately adjacent coils. The distances between geometric centers of area of the coils and the shape and the extension of the at least one turn per coil are selected such that the mutual electromagnetic coupling between coils is minimal for all pairs of immediately adjacent coils in the planar unit.

Claims

1. Arrangement for contactless energy transmission by means of induction including:

a plurality of coils arranged in a matrix, the coils having at least one conductor that surrounds a central axis of the coil at least once in one turn, the coils being arranged adjacent to one another and in a regular manner in a planar unit that extends in a first dimension, in a second dimension, and in a third dimension, and the extension of the planar unit in the first dimension and in the second dimension being significantly greater than in the third dimension, and the coils in addition being arranged in a regular manner within the planar unit in rows and/or columns such that each coil has at least two immediately adjacent coils, the distances between the centers of the coils and the shape and the extension of the at least one turn per coil being selected such that the electromagnetic coupling between coils is minimal for all pairs of immediately adjacent coils in the planar unit, the coils being arranged in a regular manner in a checkerboard-type pattern and the surfaces spanned by the at least one turn of each coil overlapping for each immediately adjacent pair of coils.

2. The arrangement in accordance with claim 1, the maximum pair-wise coupling of all coils within the matrix falling below a limit value, wherein the limit value may in particular be 5%.

7. The arrangement in accordance with claim 1, wherein if the coils are arranged in a checkerboard-type pattern the turns of the coils, at least by segment, locally approach the center and/or the geometric center of area of the coil.

8. The arrangement in accordance with claim 1, wherein the winding direction of at least one coil changing by segment.

3-6. -6. (canceled)

9. (canceled)

10. (canceled)