Patent ID: 6410885
Filing Date: 2002-06-25
Classification: B23K

Abstract:
A power source for MIG brazing comprisinga. a concentric type transformer comprising 1) a magnetic core having silicon content from about 0.95% to about 1.2% in weight; and a total thickness from about 43 to about 47 mm; 2) coils having width from about 97 to about 103 mm in diameter; length from about 115 to about 125 mm; number of primary turns from about 310 to about 670; number of secondary turns from about 18 to about 22; primary winding thickness from about 13 to about 16 mm; secondary winding thickness from about 0.65 to about 0.75 mm; primary inductance (secondary on short a circuit) from about 3.5 to about 11 mH; primary inductance (secondary open) from about 90 to about 395 mH; primary resistance from about 1.1 to about 2.9 Ohm, at 18Â° C.; secondary inductance (primary open) from about 360 to about 380 mH; and secondary resistance from about 9.2 to about 9.8 mOhm, at 18Â° C.; and b. an inductor comprising 1) a magnetic core having carbon from about 0.15% to about 0.20%, manganese from about 0.35% to about 0.70%, and silicon from about 0.32% to about 0.38% all in weight; a diameter from about 45 mm to about 55 mm, and a length from about 155 to about 165 mm; and 2) coils having width from about 73 to about 79 mm; length from about 145 to about 150 mm; number of turns from about 31 to about 41; winding inductance from about 50 to about 82 mH; winding resistance from about 6.8 to about 9.0 mOhm, at 18Â° C.