| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of a noise when a pan is up/down operated, by performing control so as to prevent even any condition from exceeding voltage or current specification of a switching element. SOLUTION: Full wave rectification of an AC power source 1 is performed in a rectifying bridge 2 and capacitors 3, 6, heating coil 4 generating a high frequency magnetic field, a switching element 5 for supplying a high frequency current to the heating coil 4 and an inverter circuit having a diode 7 are connected to the rectifying bridge 2. A chopping wave generating circuit 9, generating serrate wave based on an output of the inverter circuit, and a control circuit 12, performing output control based on output heating set by a user by an output adjusting volume 13 and information from a current transformer 8, are connected to an input port of a drive pulse generating circuit 11. |
