SYSTEM AND METHOD FOR IMPROVING NOISE PERFORMANCE OF MULTI-ZONE QUASI-RESONANT INVERTER INDUCTION HEATER

摘要

The present invention relates to a system and method for operating an induction heating cooker by which audible noise caused by different operating frequencies is overcome while still applying individual cooking zone power control. More particularly, the present invention relates to an induction heating cooker (1) comprising a plurality of resonant inductors (6) in association with induction resonant inverters (2) supplied by a common DC bus in the manner that a multi-zone induction coil system is provided, a power switch driving circuit driving power switching devices (5) associated with said induction resonant inverters (2) and a pan detection circuit for detecting presence of a pan.