Arc welding set with power source and inverter

Details Arc welding set with power source and inverter Arc welding set with power source and inverter

2006-08-22

2006-08-22

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S017000, C363S098000, C363S132000

Reexamination Certificate

active

07095634

ABSTRACT:
A welding machine with a power source and an inverter. The inverter has at least one switching leg, made up of switches in series, and an output terminal. The power source has a circuit for controlling the switches by delivering an on-signal or and off-signal. The power source also has a transformer linked to a rectifier. The power source also has a circuit for detecting the voltage that the terminals of each switch of the inverter. A pilot circuit is also present for receiving control and voltage signals. The pilot circuit then sends a pilot circuit to each of the switches. The pilot signal corresponds to an on-command when the control signal corresponds to an on-signal and when the voltage between the power electrodes is very close to zero.

REFERENCES:
patent: 4727272 (1988-02-01), Foch et al.
patent: 5486994 (1996-01-01), Pouliquen et al.
patent: 5615100 (1997-03-01), Radecker et al.
patent: 6016258 (2000-01-01), Jain et al.
patent: 6246599 (2001-06-01), Jang et al.
patent: 2 564 662 (1985-11-01), None
French Search Report for FR 0450251.

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