In welding power supplies, what is another term for constant voltage?

In welding power supplies, what is another term for constant voltage?

• A. Constant potential
• B. Constant current
• C. Pulsed voltage
• D. Variable voltage

Answer: (A)

Constant voltage in welding power supplies means keeping the electrical potential difference between the electrode and the workpiece fixed. Voltage, or potential difference, is what drives current through the arc, so a constant-voltage supply holds that push steady while the current can vary with the arc length and other load changes. This approach helps maintain a stable arc length and bead for processes like MIG welding. The alternative of constant current keeps the current fixed and lets voltage change with the load; pulsed voltage implies the voltage is turned on and off rather than held steady; variable voltage means the voltage isn’t kept constant. Since the goal is to maintain a steady potential difference, constant voltage is the same idea as constant potential.

Constant voltage in welding power supplies means keeping the electrical potential difference between the electrode and the workpiece fixed. Voltage, or potential difference, is what drives current through the arc, so a constant-voltage supply holds that push steady while the current can vary with the arc length and other load changes. This approach helps maintain a stable arc length and bead for processes like MIG welding. The alternative of constant current keeps the current fixed and lets voltage change with the load; pulsed voltage implies the voltage is turned on and off rather than held steady; variable voltage means the voltage isn’t kept constant. Since the goal is to maintain a steady potential difference, constant voltage is the same idea as constant potential.