Abstract: A plasma generator for three phase mains alternating current operation has three plasma generation tubes interconnected with a nozzle, each plasma generation tube having a plasma initiator for forming a plasma into an electrode ring, the electrode ring including substantially tangential gas introduction orifices which cause gas entering the electrode ring to helically rotate. Each of the electrode rings is coupled to a unique one of the three phases of AC voltage supply, such that when the initiator plasma is introduced into one of the electrode rings, a plasma discharge occurs with a path from the electrode ring, through the plasma generation tube, and to a different electrode ring.

Abstract: A plasma generation system that is powered with an alternating current power source has been developed. The system includes a plasma generator that heats gas to a high temperature to form plasma. The gas is heated by passing through an electrical arc generated by electrodes. The gas is fed to the generator by a feed system comprising a plurality pneumatic feed devices that supply the plasma-forming gas. The plasma generator is powered by an alternating current power source.

Abstract: A plasma generation system that is powered with an alternating current power source has been developed. The system includes a plasma generator that heats gas to a high temperature to form plasma. The gas is heated by passing through an electrical arc generated by electrodes. The gas is fed to the generator by a feed system comprising a plurality pneumatic feed devices that supply the plasma-forming gas. The plasma generator is powered by an alternating current power source.

Abstract: Three adjustable electrodes (33a-33c) within a chamber (40) form a thermal plasma generating system (30). The electrodes (33a-33c) are positioned with a narrow gap at one portion and a wide gap at another portion to form a cone shape. The gap between the electrodes is adjusted to accommodate for wear on the electrodes (33a-33c). An electric arc is initiated at the narrowest point between two electrodes which moves over the length of the electrodes because of a magnetic field created by the arc and the forward motion of the injected stream. At the end of the electrodes, the arc is extinguished and another arc is initiated. The continuous are moving along the electrodes ionizes a working stream that is tangentially injected from three pneumatic rings (35a-35c) which provide improved mixing of the working stream for high quality thermal plasma. The thermal plasma exits through a narrow orifice (42).

Abstract: A plasma generating system uses three electrodes inside a chamber, connected to a low voltage three-phase AC supply. A high voltage AC plasma generator produces an ionized oscillator gas which is injected into the gap between the electrodes. A continuous arc is produced inside the chamber. The arc moves along the electrodes and then superheats and ionizes a working gas which is tangentially injected from a pneumatic ring.