| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an induction heating device free from defects in an inverter circuit even if a time difference occurs in an on-timing of a relay switch between a plurality of the induction heating devices. <P>SOLUTION: The device is provided with inverters 13, 23, full-wave rectifying means 11, 31, filter capacitors 12, 32, relay switches 20, 40, and a first and a second main charging circuits 3, 4 having preliminary charging circuits 51, 52 respectively. The preliminary charging circuits 51, 52 are provided with preliminary charging diodes 18, 38 connected in series between commercial alternate-current-side contacts of the relay switches 20, 40 and the filter capacitors 12, 32 and anti-inverse-flow diodes 10, 30 and preliminary charging resistors 19, 39, and a voltage detecting circuits 15, 35 are connected each between a connecting point of the preliminary charging diode 18, 38 and the anti-inverse-flow diode 10, 30 and a ground. <P>COPYRIGHT: (C)2004,JPO |
