US 12,348,053 B1
Wireless power transfer system
Jian Li, San Jose, CA (US); and Marcel Colman Eric Stieber, San Jose, CA (US)
Assigned to AMAZON TECHNOLOGIES, INC., Seattle, WA (US)
Filed by AMAZON TECHNOLOGIES, INC., Seattle, WA (US)
Filed on Dec. 7, 2023, as Appl. No. 18/532,891.
Claims priority of provisional application 63/480,613, filed on Jan. 19, 2023.
Int. Cl. H02J 50/10 (2016.01); H02J 50/80 (2016.01); H02K 1/12 (2006.01); H02K 3/32 (2006.01)
CPC H02J 50/10 (2016.02) [H02J 50/80 (2016.02); H02K 1/12 (2013.01); H02K 3/32 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first portion comprising:
a first structure;
a motor stator affixed to the first structure, wherein the motor stator has a first axis;
a first core affixed to the first structure, the first core comprising a magnetically permeable material that is radially symmetrical with respect to the first axis;
a first coil affixed to the first core, wherein the first coil is radially symmetrical with respect to the first axis; and
power transmit circuitry connected to the first coil; and
a second portion comprising:
a second structure;
a motor rotor affixed to the second structure;
a second core affixed to the second structure, the second core comprising a magnetically permeable material that is radially symmetrical with respect to the first axis;
a second coil affixed to the second core, wherein the second coil is radially symmetrical with respect to the first axis, and further wherein the first coil is proximate to the second coil during operation; and
power receive circuitry connected to the second coil.