The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Mar. 20, 2006
Gerhard Tuymer, Bad Schallerbach, AT;
Jürgen Ramm, Maienfeld, CH;
Daniel Lendi, Grabs, CH;
Oerlikon Trading AG, Trubbach, Trubbach, CH;
Abstract
The invention relates to a vacuum plasma generator for providing a plasma discharge () for treating work pieces () by way of a pulsed plasma process in a vacuum chamber (). Said vacuum plasma generator comprises a generator output (') having an AC mains supply (), an AC/DC mains rectifier system () for rectifying the AC mains voltage to a DC voltage, a filter capacitor (), a first stage as clocked DC/DC voltage converter () with means for adjusting the DC output voltage which produces an intermediate circuit voltage (Uz), comprising a controlled power switch () which feeds the primary winding of a transformer () and the secondary winding of which is connected to a rectifier () and a downstream intermediate capacitor () and configures a floating transformer secondary circuit (). Said secondary circuit is connected to a downstream second stage which is a pulse output stage () and is connected to the generator output (′). The DC/DC voltage converter () has at least two floating transformer secondary circuits () and comprises a switch-over device () with a switch controller () for optionally switching the floating transformer secondary circuits () in parallel or in series.