Plasma torch pilot arc circuit

Details Plasma torch pilot arc circuit Plasma torch pilot arc circuit

1998-03-12

1999-11-23

Walberg, Teresa

Electric heating

Metal heating

By arc

21912154, B23K 900

Patent

active

059904437

ABSTRACT:
A pilot arc circuit for a plasma torch establishes a pilot arc current in the channel between the torch electrode and torch tip at a first target level which is greater than a predetermined minimum current sufficient to maintain a stable pilot arc. After a period of time following pilot arc initiation, the pilot arc current is reduced to a second target level which is greater than or equal to the predetermined minimum current so that damage to the torch is reduced by minimizing wear on the parts. The pilot arc current is established and maintained as a function of a pilot arc reference signal. Pulsing the pilot arc current assists in main arc transfer and enhances pilot arc stability.

REFERENCES:
patent: 3688180 (1972-08-01), Chiasson et al.
patent: 3774007 (1973-11-01), Chiasson et al.
patent: 4061899 (1977-12-01), Gillitzer et al.
patent: 4092517 (1978-05-01), Woodacre
patent: 4109130 (1978-08-01), Oku
patent: 4225769 (1980-09-01), Wilkins
patent: 4247752 (1981-01-01), Stringer
patent: 4282569 (1981-08-01), Hardwick et al.
patent: 4283618 (1981-08-01), Jakob
patent: 4560857 (1985-12-01), Segawa et al.
patent: 4628180 (1986-12-01), Edberg
patent: 4665299 (1987-05-01), Iwata
patent: 4929811 (1990-05-01), Blankenship
patent: 4973821 (1990-11-01), Martin
patent: 5036176 (1991-07-01), Yamaguchi et al.
patent: 5166494 (1992-11-01), Luo et al.
patent: 5170030 (1992-12-01), Solley et al.
patent: 5183990 (1993-02-01), Enyedy
patent: 5212364 (1993-05-01), Chen
patent: 5235162 (1993-08-01), Nourbakhsh
patent: 5349605 (1994-09-01), Campbell
patent: 5365035 (1994-11-01), Poulsen et al.
patent: 5416297 (1995-05-01), Luo et al.
patent: 5424507 (1995-06-01), Yamaguchi
patent: 5486679 (1996-01-01), Hamura et al.
patent: 5506384 (1996-04-01), Yamaguchi
patent: 5506387 (1996-04-01), Sawada et al.
patent: 5530220 (1996-06-01), Tatham
patent: 5548097 (1996-08-01), Couch, Jr. et al.
patent: 5620617 (1997-04-01), Borowy et al.
patent: 5630952 (1997-05-01), Karino et al.
patent: 5643475 (1997-07-01), Karino et al.
patent: 5660745 (1997-08-01), Naor
patent: 5844197 (1998-12-01), Daniel

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