| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of heating-power adjustment from a high power heating to a low power heating regardless of a pan size, and capable of judging the pan safely without flowing an excess current even to a pan of low impedance such as an aluminum-made pan. <P>SOLUTION: One set of arm out of three sets of arms is made a common arm 9, and serial resonance circuits 32, 33 and 34, 35 are respectively connected to the common arm 9 and the other two sets of arms 10, 11, and the inner coil 32 and the outer coil 34 of the serial resonance circuit are connected so that the circuiting direction of the current flowing from the common arm 9 may be in same direction. In a control part 39, a full-bridge operation to drive the common arm 9 and the other two sets of arms 10, 11 in high frequency and a half-bridge operation to drive fixedly the common arm 9 and drive at least one set of the other two sets of arms 10, 11 in high frequency are made switchable. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
