DC biased AC corona charging
US6349024B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1999 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0291
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one corona charging arrangement described in the specification, a coronode supplied with AC voltage is contacted by an insulating member in the form of a mesh of insulating filaments or an imperforate dielectric insulating member or filaments wound around an insulating member and retaining the coronode in fixed position with respect to the insulating member. In another embodiment, the insulating member is a layer of dielectric material coated on a coronode in the form of a corona wire and a capacitor is connected between the AC voltage source and the coronode. By providing an insulating structure for a coronode and applying a DC biased AC voltage to the coronode, improved charging efficiency with respect to prior art arrangements is obtained while reducing generation of ozone and nitrates and increased charging currents are obtained to provide high charging rates without arcing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.