US 12,295,086 B2
Multi-coil induction warming system
Nick Bassill, Milwaukee, WI (US); Ishan Shah, Milwaukee, WI (US); and Fei Shang, Milwaukee, WI (US)
Assigned to Hatco Corporation, Milwaukee, WI (US)
Filed by HATCO CORPORATION, Milwaukee, WI (US)
Filed on Oct. 7, 2022, as Appl. No. 17/961,695.
Application 17/961,695 is a continuation of application No. 16/416,111, filed on May 17, 2019, granted, now 11,483,903.
Claims priority of provisional application 62/673,769, filed on May 18, 2018.
Claims priority of provisional application 62/673,775, filed on May 18, 2018.
Claims priority of provisional application 62/673,772, filed on May 18, 2018.
Prior Publication US 2023/0035025 A1, Feb. 2, 2023
Int. Cl. H05B 6/06 (2006.01); H05B 6/12 (2006.01); H05B 6/36 (2006.01); H05B 6/44 (2006.01)
CPC H05B 6/065 (2013.01) [H05B 6/1245 (2013.01); H05B 6/365 (2013.01); H05B 6/44 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An induction heating system comprising:
a heating surface;
a first power inverter;
a second power inverter;
a single center working coil positioned at a center of the heating surface, the single center working coil electrically coupled to the first power inverter; and
a plurality of ring working coils connected in series and electrically coupled to the second power inverter;
wherein the single center working coil and the plurality of ring working coils are configured to receive power from the first power inverter and the second power inverter, respectively, to produce magnetic fields to facilitate cooking with a ferrous material; and
wherein the plurality of ring working coils are consecutively arranged and spaced along an arced path to form a ring around the single center working coil.