Patent ID: 8952293
Filing Date: 2015-02-10
Classification: B23K,H02M

Abstract:
1. A method of dynamically adjusting an output voltage for a welding or cutting operation, comprising: detecting an increase in a voltage requirement present at a load; increasing in phase duty cycles in a pair of forward converter circuits until the in phase duty cycles reach an upper limit as the voltage requirement present at the load increases to increase the voltage output of the pair of forward converter circuits to accommodate the increase in the voltage requirement present at the load; and changing, as the voltage requirement further increases, a phase shift between the duty cycle of a first forward converter circuit of the pair of forward converter circuits and the duty cycle of a second forward converter circuit of the pair of forward converter circuits upon reaching the upper limit to further increase the voltage output of the pair of forward converter circuits to accommodate the further increase in the voltage requirement present at the load.