| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce vibration and audible noise generated from heating coils and a load pan due to variable magnetic fields occurring from heating coils in an induction-heating cooker. <P>SOLUTION: A pan-noise detection means detects audible noise generated due to resonance between heating coils and a load pan or the like caused by variable magnetic fields occurring from the heating coils. When a control means detects the occurrence of resonance sound by the detection of the audible noise, the control means changes a drive frequency of an inverter circuit in order to drive the inverter circuit at a frequency that prevents the occurrence of resonance. Thus, it reduces audible noise due to resonance that is unpleasant for a user. Consequently, it improves quality of an induction-heating cooker. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
