Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1993-02-05
1994-09-27
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 71, 363 97, 363131, 219137PS, B23K 910
Patent
active
053511751
ABSTRACT:
A high frequency power supply for supplying a welding current through a choke to a welding station including an electrode element and a workpiece element. The power supply includes a first transformer with a first core and means for receiving on said first core a first secondary winding with the first core being magnetized in a first flux direction upon creation of first current pulse and a second transformer with a second core and means for receiving on said second core a second secondary winding with said second core being magnetized in a second flux direction upon creation of a second current pulse in the direction opposite to the first pulse. The first transformer is operated by a first capacitor means for applying a first voltage to the first transformer upon operation of a first switch means and the second transformer is operated by a second capacitor means for applying second voltage to the second transformer upon operation of a second switch means. A single rectifier charges the first and second capacitor means to a given total voltage and control means are provided for maintaining said first and second voltages generally equal.
REFERENCES:
patent: 4564742 (1986-01-01), Karlsson
patent: 4897522 (1990-01-01), Bilczo et al.
patent: 5088017 (1992-02-01), Yaginuma et al.
patent: 5229928 (1993-07-01), Karlsson et al.
Sterrett Jeffrey L.
The Lincoln Electric Company
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