Plasma arc torch with secondary starting circuit and electrode

摘要

A plasma arc torch includes an electrode, a tip, a third element, and a secondary power circuit. The electrode is disposed within the plasma arc torch and adapted for electrical connection to a cathodic side of a power supply. The tip is positioned distally from the electrode and adapted for electrical connection to an anodic side of the power supply during piloting. A plasma chamber is formed between the electrode and the tip. The third element is disposed near a proximal end of the plasma chamber. The secondary power circuit is disposed proximate the plasma arc torch and in electrical communication with the third element. The secondary power circuit is configured to generate a high voltage pulse on the third element using input to secondary power circuit to initiate a first arc to start the plasma arc torch.

主权项

1. A plasma arc torch comprising:
a main power circuit for applying a voltage across an electrode disposed within the plasma arc torch, the electrode adapted for electrical connection to a cathodic side of a power supply; a tip positioned distally from the electrode and adapted for electrical connection to an anodic side of the power supply during piloting, a plasma chamber being formed between the electrode and the tip; a third element disposed near a proximal end of the plasma chamber, wherein the third element comprises:
a plurality electrically of conductive extensions extending between a first electrically conductive ring and a second electrically conductive ring, the first electrically conductive ring disposed towards a distal end of the third element; and a secondary power circuit disposed proximate the plasma arc torch and in electrical communication with the third element, the secondary power circuit configured to generate a high voltage pulse on the third element using input to the secondary power circuit to initiate a first arc to start the plasma arc torch.