Shielding of electronics from magnetic fields
Some aspects relate to an apparatus, comprising: a coil; an electronic circuit; and an electrically conductive shield positioned between the coil and the electronic circuit. Some aspects relate to an apparatus, comprising: a coil; an electronic circuit; and a magnetic core magnetically coupled to the coil, the magnetic core having an overhang protruding on a side of the magnetic core facing the electronic circuit.
1 . An apparatus, comprising:
a coil;
an electronic circuit;
an electrically conductive shield positioned between the coil and the electronic circuit; and
a magnetic core magnetically coupled to the coil,
wherein the electrically conductive shield is positioned between the magnetic core and the electronic circuit, and
wherein the magnetic core has a magnetic core overhang protruding at an outer edge of the magnetic core on a side of the magnetic core facing the electronic circuit,
wherein the electronic circuit includes a printed circuit board and the magnetic core overhang protrudes past the printed circuit board.
2 . The apparatus of claim 1 , wherein the electrically conductive shield has a planar section.
3 . The apparatus of claim 1 , wherein the electrically conductive shield has a conductive shield overhang protruding on a side of the electrically conductive shield facing the electronic circuit.
4 . The apparatus of claim 3 , wherein the conductive shield overhang has at least a portion that is straight.
5 . The apparatus of claim 3 , wherein the conductive shield overhang has at least a portion that is curved.
6 . The apparatus of claim 3 , wherein the conductive shield overhang is curled in a curved manner or a stepped manner in an inward direction or an outward direction.
7 . The apparatus of claim 1 , wherein the electrically conductive shield comprises a metal.
8 . The apparatus of claim 1 , wherein the electrically conductive shield has a thickness of greater than a skin depth at a fundamental frequency of current in the coil.
9 . The apparatus of claim 1 , wherein the electronic circuit is electrically coupled to the coil.
10 . The apparatus of claim 1 , wherein the electronic circuit comprises an inverter of a wireless power transmitter or a rectifier of a wireless power receiver.
11 . The apparatus of claim 1 , wherein the magnetic core overhang is separated from a second portion of the magnetic core by a gap.
12 . The apparatus of claim 1 , wherein the magnetic core overhang has an inner edge within a radius of the coil.
13 . An apparatus, comprising:
a coil;
an electronic circuit; and
a magnetic core magnetically coupled to the coil, the magnetic core having a magnetic core overhang protruding at an outer edge of the magnetic core on a side of the magnetic core facing the electronic circuit,
wherein the electronic circuit includes a printed circuit board and the magnetic core overhang protrudes past the printed circuit board.
14 . The apparatus of claim 13 , wherein the magnetic core overhang has a first overhang section protruding on the side of the magnetic core facing the electronic circuit and the magnetic core overhang also has a second overhang section protruding in an inward direction.
15 . The apparatus of claim 13 , wherein the electronic circuit is electrically coupled to the coil.
16 . The apparatus of claim 13 , wherein the electronic circuit comprises an inverter of a wireless power transmitter or a rectifier of a wireless power receiver.
17 . The apparatus of claim 13 , wherein the magnetic core overhang has an inner edge within a radius of the coil.