Three-phase to single-phase power supply converter for welding e

Details Three-phase to single-phase power supply converter for welding e Three-phase to single-phase power supply converter for welding e

1991-06-06

1995-02-07

Shaw, Clifford C.

Electric power conversion systems

Phase conversion without intermediate conversion to d.c.

With automatic voltage magnitude or phase angle control

2191301, B23K 910

Patent

active

053880315

ABSTRACT:
A power supply unit comprises three input terminals connected to a three-phase A.C. power supply, a phase control circuit controlling the firing of the three-phase A.C. for each phase, and a transformer comprising a single-phase iron core wound by first to third coils at the primary side and by a single-phase coil at the secondary side, and in which the first to third primary coils are connected to the three-phase A.C. power supply. It outputs a single-phase A.C. having a frequency three times that of the input current.

REFERENCES:
patent: 4435632 (1984-03-01), Risberg

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