H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 7/12 (2006.01) B23K 9/09 (2006.01) B23K 9/10 (2006.01) B23K 10/00 (2006.01) H02M 3/155 (2006.01) H02M 3/158 (2006.01)
Patent
CA 2192891
A power supply, such as a plasma cutting power supply or a welding power supply, that provides an output to a pair of output terminals is disclosed. The power supply includes a source of voltage and a plurality of choppers. The choppers are connected in parallel between the voltage source output terminals. A controller controls the choppers so that they are out-of-phase with respect to each of the other of the plurality of choppers. The choppers preferably include a freewheeling diode, an inductor and a switch. The number of choppers is approximately equal to the ratio of the open circuit voltage to the output load voltage.
Li Stephen H.
Reynolds Jon O.
Schneider Joseph C.
Finlayson & Singlehurst
Illinois Tool Works Inc.
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