Voltage converter for water treatment system UV bulb
US5738780A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S439/956
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driver or ballast for the ultraviolet bulb of a water treatment system. The driver includes a step-up transformer and a feedback oscillator connected between the secondary and the primary of the transformer. The secondary of the transformer also is selectably connected through one of two different capacitor compensators depending on water flow through the system. In a low intensity mode, the current and the power factor output of the driver are relatively low, preferably just enough to keep the bulb filaments energized. In a high intensity mode, the current and the power factor are relatively high to power the bulb at a relatively high efficiency. The driver operates at a relatively low DC voltage. A voltage converter selected as function of the local line voltage converts the AC line voltage to the necessary DC voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.