US 10,892,088 B1
Stationary device for contactless electrical energy transmission
Damijan Miljavec, Ljubljana (SI); Mario Vukotic, Ljubljana (SI); Selma Corovic, Ljubljana (SI); and Laslo Olah, Richardson, TX (US)
Assigned to Texas Institute of Science, Inc., Richardson, TX (US)
Filed by Texas Institute of Science, Inc., Richardson, TX (US)
Filed on Aug. 6, 2020, as Appl. No. 16/987,309.
Claims priority of provisional application 62/975,940, filed on Feb. 13, 2020.
Int. Cl. H01F 38/14 (2006.01); H02J 50/10 (2016.01); H02J 50/00 (2016.01); H01F 3/14 (2006.01)
CPC H01F 38/14 (2013.01) [H01F 3/14 (2013.01); H02J 50/005 (2020.01); H02J 50/10 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A contactless charging apparatus comprising:
a primary electromagnetic structure having an upper end and an interior end, the primary electromagnetic structure including a primary yoke at the upper end, the primary yoke having a plurality of primary wedges extending therefrom at the interior end of the primary electromagnetic structure, the primary yoke magnetically connecting the plurality of primary wedges;
the plurality of primary wedges defining an inner space and a plurality of primary slots interposed therebetween, the plurality of primary slots extending radially through the primary yoke and intersecting the interior of the primary electromagnetic structure;
a secondary electromagnetic structure having a lower end and an interior end, the secondary electromagnetic structure including a secondary yoke at the lower end, the secondary yoke having a plurality of secondary wedges extending therefrom at the interior end of the secondary electromagnetic structure, the secondary yoke magnetically connecting the plurality of secondary wedges;
the plurality of secondary wedges defining an inner space and a plurality of secondary slots interposed therebetween, the plurality of secondary slots extending radially through the secondary yoke and intersecting the interior end of the secondary electromagnetic structure;
each of the primary yoke and the secondary yoke including a soft-magnetic material;
each of the plurality of primary wedges and the plurality of secondary wedges including the soft-magnetic material; and
the primary electromagnetic structure and the secondary electromagnetic structure being disposed in an opposing relationship with the plurality of primary wedges facing the plurality of secondary wedges with a non-magnetic gap therebetween.