Multi-process welding and cutting machine

A welding system, comprising:

• a main transformer having a first primary winding, a second primary winding separate from the first primary winding, and a secondary winding;
• an output diode connected to the secondary winding of the main transformer;
• a power board configured to receive mains power and to convert, with an inverter, the mains power to converted power to be input to the main transformer;
• a first switch having an input connected to an output of the power board and configured to pass the converted power to the main transformer, wherein the converted power is alternating current power, and the input of the first switch receives the alternating current power from the inverter;
• an output inductor having a first terminal and a second terminal, wherein the first terminal is connected to a center tap of the secondary winding;
• a second switch connected to the second terminal of the output inductor;
• a pilot control switch configured to enable a pilot arc to be energized from an output of the output diode;
• and
• a control board, in communication with the first switch, and the pilot control switch, and configured to control the first switch to be arranged in one of a first configuration and a second configuration,
• wherein when the first switch is in the first configuration, an output of the main transformer supplies a relatively high current and low voltage through the output diode, and when the first switch is in the second configuration, the output of the main transformer supplies a relatively low current and high voltage through the output diode, and when the first switch is arranged, by the control board, in the second configuration, the second switch is placed in a state that causes an additional output inductance to be connected in series with the output inductor, which is connected to the center tap of the secondary winding, and
• the output of output diode supplies the relatively high current and low voltage, and the relatively low current and high voltage based on a selected welding or cutting process.