US Patent 7651553 Ballast circuit for electrostatic particle collection systems

The present invention provides a ballast circuit and method for fabricating the same for multi-electrode corona discharge arrays. The circuit includes a conductive plastic material and at least one corona electrode protruding from the conductive plastic material. The distance between the plastic material and the corona electrode varies and controls the electrical resistance and determines the voltage breakdown of the circuit. Additionally, a particle collection surface may preferably be located within the conductive plastic material or preferably be separated from the material depending on the circuit design and configuration.