Patent ID: 9539661
Date: 2017-01-10
CPC Classifications: B23K,H02M

Claim:
1. A welding or cutting power supply system, comprising: a single ended converter circuit comprising a solid state switching circuit having power electronic switches for producing output power at a controllable level suitable for a welding or cutting operation, the solid state switching circuit further comprising an output transformer that transforms output of the solid state switching circuit; an output inductance coupled to the output transformer of the solid state switching circuit; and control circuitry coupled to the solid state switching circuit and configured to provide PWM control signals for controlling states of the power electronic switches of the solid state switching circuit to maintain desired loading of the solid state switching circuit, wherein during a series of cycles of the solid state switching circuit the control circuitry is configured to apply PWM control signals to the solid state switching circuit to produce output from the solid state switching circuit that is not limited to a maximum 50% duty cycle for multiple consecutive cycles of the series of cycles of the solid state switching circuit.