| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restrain buoyant force while suppressing or eliminating interference sound, even when simultaneously operating a plurality of inverters induction-heating an object to be heated made of non-magnetic metal with low resistance, by changing frequencies of high frequency current supplied to a heating coil. <P>SOLUTION: An input control means 18a controls the frequency difference between the high frequency current flowing through the heating coil 10a corresponding thereto and the frequency of the high frequency current flowing through the other heating coil 10b to become higher than an audible frequency. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
