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Miyachi Unitek HF25 DC Resistance Welding System is a 25 kHz, three-phase, state-of-the-art inverter power supply for joining precision small parts at high speed with controllable rise times. The delivered welding energy is in the form of DC welding energy. High speed (40 microseconds) digital feedback automatically controls weld current, voltage, or power, providing more welding consistency compared to traditional direct energy (AC) or capacitive discharge (CD) technologies. This microprocessor technology automatically compensates for changes in work piece resistance, load inductance, weld transformer saturation, and changes in line voltage. Input kVA (Demand) 30 kVA max at 3% duty cycle. Output Power at 12% Duty Cycle and a Combined PULSE 1 and PULSE 2 Pulse Width of 50 mS: 6.0 kW max. Maximum Output Current: 2400A. Max Peak Output Voltage at Max Peak Output Current: 5.2V. Duty Cycle at Max Peak Output Current: 3%. Max Load Resistance for Max Output Current: 2.1 m-Ohm. Current: 100 - 2400 A, 0.001 kA, ±(2% of setting +2 A); Voltage: 0.2 - 9.99 V, 0.001 V ±(2% of setting +0.02 V); Power: 0.05 - 9.99 kW, 0.001 kW, ±(5% of setting +10 W); Weld Periods 0.0 - 9.9 mS with 0.1 mS at +/-20 uS; 10 - 99 mS with 0.1 mS resolution at ± 20 uS.
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