Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1994-03-03
1995-08-22
Dougherty, Thomas M.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
363 41, 363101, G05F 140
Patent
active
054443563
ABSTRACT:
A power supply for providing an ac/dc output to a load, includes a first source of dc power and an inverter that provides an ac output to the load. A second source of dc power is provided and selectably connects the first and second sources of dc power in series with the load when the output current reverses. In one embodiment the power sources are connected in series with every output current reversal. The first source of dc power is controllable and the magnitude of the dc current is responsive to a current reference signal. A control circuit provides the current reference signal, wherein the current reference signal is pulsed immediately prior to the ac output reversing polarity. The first source of dc power source preferably includes a buck converter that is switched at a variable frequency, depending upon the desired output current. In the event the user selects either an ac or dc electrode negative output a period of electrode positive dc energy is provided at start up to help establish the arc.
REFERENCES:
patent: 3300683 (1967-01-01), Weishaar
patent: 3330933 (1967-07-01), Maklary
patent: 3894210 (1975-07-01), Smith et al.
patent: 3999034 (1976-12-01), Barhorst
patent: 4038515 (1977-07-01), Risberg
patent: 4180720 (1979-12-01), Barhorst
patent: 4876433 (1989-10-01), Kashima et al.
patent: 4963715 (1990-10-01), Tuttle
patent: 5066900 (1991-11-01), Bassett
patent: 5070294 (1991-12-01), Nochi
patent: 5220151 (1993-06-01), Terayama et al.
Welding Handbook, Chapter 3, Gas Tungsten Arc Welding, pp. 74-107, American Welding Society (1991).
Madsen Michael D.
Reynolds Jon O.
Dougherty Thomas M.
Miller Electric Mfg. Co.
To E.
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