| 摘要 |
PROBLEM TO BE SOLVED: To continuously perform induction heating to a cooking pan through a drive circuit with the simple structure by generating the control signal for driving a switching element through a coupling coil to be magnetically connected to a heating coil. SOLUTION: In an inverter circuit 1, direct current from a direct current power source 4 is supplied in a high frequency to a heating coil 2, which is provided with a resonance capacitor 3, by a switching element 5 so as to generate the high frequency magnetic field for induction heating of a cooking pan. Control signal is generated on the basis of the voltage waveform of the heating coil 2, and transmitted to a drive circuit 15 so as to drive the switching element 5. In the induction heating cooker, a coupling coil 8 of a coupling circuit 7 is provided so as to be magnetically connected to the heating coil 2, and the resonance voltage having the similar waveform with the resonance voltage generated by the heating coil 2 is generated. A capacitor 9 is connected in series to the coupling coil 8, and furthermore, a diode 10, resistors 12, 13 and a voltage control element 11 are provided. |
