Patent ID: 9198233
Filing Date: 2015-11-24
Classification: H05B

Abstract:
1. An induction cooktop, comprising: a plurality of induction heating coils; an inverter configured to supply energy to each of said plurality of induction heating coils; a feedback sensing circuit configured to monitor a characteristic of said induction heating coils that is indicative of audible noise generated by simultaneous operation of said plurality of induction beating coils; a conditioning circuit configured to receive one or more signals associated with the monitored characteristic from the feedback sensing circuit, and to convert the one or more received signals into one or more digital signals indicative of the audile noise; and a controller in communication with said feedback sensing circuit, said conditioning circuit and said induction heating coils, the controller comprising one or more processors and one or more memory devices, the one or more memory devices storing computer-readable instructions that when executed by the one or more processors cause the one or more processors to perform operations, the operations comprising; varying an operating characteristic of at least one of said operating induction heating coils based at least in part on the one or more digital signals to change the audible noise into a pre-defined audible noise pattern stored in the controller or a memory accessible by the controller based at least in part on a signal received from said feedback sensing circuit.