Power supply for processing of gaseous media
AssigneeAccentus PLC
InventorsStephen Ivor Hall, Michael Inman, Anthony Robert Martin, David Raybone, David Michael Weeks, David Leslie Segal
Life of this patent
Estimating the term…
Abstract
A reactor (1) particularly for the plasma treatment of internal combustion engine exhaust gases, in which a power supply (10) and a reactor bed (2) of the dielectric barrier discharge type are connected directly and enclosed in an earthed metal chamber (17) which both isolates the high voltage power supply and acts as a Faraday cage preventing the emission of electromagnetic radiation from the power supply or plasma.
Claims15
A reactor for processing a gaseous medium, said reactor including a reactor bed and at least two electrodes, conduits for constraining a gaseous medium to flow through said reactor bed, a power supply unit connected to said reactor bed for generating and applying a potential across said reactor bed for exciting an electric discharge in said gaseous medium as it flows through said reactor bed, wherein said reactor is a dielectric barrier discharge reactor wherein at least one of said electrodes has a dielectric barrier coating applied thereto, said reactor bed and said power supply unit being located adjacent to each other and enclosed in an electrically conductive enclosure that is maintained at ground potential, and means for electrically connecting said reactor bed and said power supply unit directly together.
A reactor processing a gaseous medium, said reactor including a reactor bed, at least two electrodes, conduits for constraining a gaseous medium to flow through said reactor bed, a power supply unit for generating and applying an electric potential across said reactor bed for exciting an electric discharge in said gaseous medium as it flows through said reactor bed, said reactor comprising a dielectric barrier discharge reactor wherein at least one of said electrodes has a dielectric barrier coating coated thereon, said reactor bed and said power supply unit being located adjacent to each other and connected directly together electrically, said reactor and said power supply unit forming an electrical circuit, said electrical circuit having a resonant frequency and said power supply unit having an output voltage which has a frequency, and means for making said resonant frequency substantially equal to the frequency of said output voltage from said power supply unit, said reactor being adapted for incorporation into an exhaust system of a variable speed, internal combustion, engine;
- a step-up transformer having primary windings and secondary windings, an ac generator connected to said primary windings, said ac generator having an output frequency, means for maintaining said output frequency at a pre-determined value regardless of variations in the variable speed of said internal combustion engine in the exhaust system of which the reactor is incorporated, and wherein said engine includes drive means for driving said ac generator at a constant speed.
Dependencies are inferred from the claim text.