Plasma torch electronic pulsing circuit

Details Plasma torch electronic pulsing circuit Plasma torch electronic pulsing circuit

1991-09-18

1992-12-08

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912148, 21912157, B23K 910

Patent

active

051700301

ABSTRACT:
A plasma arc torch having new electronic circuit concepts wherein main current regulated power means regulates the pilot current prior to main arc transfer. Further, the circuit may contain two inductors to which DC current initially flows but is interrupted upon main arc transfer such that one inductor maintains the pilot arc while the current in the second inductor forces the establishment of the transferred arc. Also, advantages are presented in pulsing the cutting arc as well as pulsing the pilot arc.

REFERENCES:
patent: 4280042 (1981-07-01), Berger et al.
patent: 4324971 (1982-04-01), Frappier
patent: 4598191 (1986-07-01), Marhic et al.
patent: 4839499 (1989-06-01), Kotecki et al.
patent: 4943699 (1990-07-01), Thommes
patent: 5036176 (1991-07-01), Yamaguchi et al.

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