US 12,250,764 B2
DC plasma torch electrical power design method and apparatus
John Jared Moss, Palo Alto, CA (US); and Brian T. Noel, Oakland, CA (US)
Assigned to Monolith Materials, Inc., Lincoln, NE (US)
Filed by Monolith Materials, Inc., Lincoln, NE (US)
Filed on Apr. 21, 2023, as Appl. No. 18/137,918.
Application 18/137,918 is a continuation of application No. 16/892,199, filed on Jun. 3, 2020, granted, now 11,665,808.
Application 16/892,199 is a continuation of application No. 15/221,088, filed on Jul. 27, 2016, abandoned.
Claims priority of provisional application 62/198,431, filed on Jul. 29, 2015.
Prior Publication US 2023/0354501 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H05H 1/26 (2006.01); H05H 1/34 (2006.01); H05H 1/36 (2006.01); H05H 1/24 (2006.01)
CPC H05H 1/36 (2013.01) [H05H 1/3431 (2021.05); H05H 1/2443 (2021.05)] 15 Claims
OG exemplary drawing
 
1. A method for operating a direct current (DC) plasma arc torch, comprising:
operating the DC plasma arc torch using a plasma forming gas and a power supply,
wherein the power supply is configured to supply at least two times an average operating voltage used to operate the DC plasma arc torch, resulting in more stable operation of the DC plasma arc torch including reduced voltage fluctuations and substantially no extinguishing of an arc generated by the DC plasma arc torch, and
wherein the power supply contains inductive filters distributed among positive and negative legs of a regulator to prevent conducted emissions caused by the DC plasma arc torch from feeding back into sensitive electronic components.