| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a welding type power supply with a snubber circuit which recovers energy. <P>SOLUTION: The welding type power supply with the snubber circuit includes an inverter output circuit including a bus, a switch, and an output part, a bus inductor to be connected to the inverter and the bus, the snubber circuit connected to a plurality of switches including the snubber inductor 212, a snubber capacitor 215 and a recovery switch 213, a snubber capacitor voltage feedback circuit, and a control circuit. At least one freewheel circuit includes the snubber inductor and at least one freewheel switch 218 or 219. The snubber condenser voltage feedback circuit is connected to the snubber capacitor and it supplies snubber capacitor voltage feedback output to the control circuit. The control circuit includes a circuit to compare the snubber capacitor voltage feedback and a threshold value and it controls the recovery switch with the output. <P>COPYRIGHT: (C)2004,JPO |
