Strobe flash lamp power supply with afterglow prevention circuit
US4755723A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Apr 24, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/335
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable frequency DC to DC converter generates a pulsed, variable magnitude output voltage where the frequency of the pulsed output voltage varies with changes in the magnitude of the output voltage. An energy storage capacitor is coupled between the converter coupled inductor and strobe flash lamp or other gaseous discharge tube and is periodically discharged through the flash lamp. A variable impedance device in the form of a capacitor is coupled in series with the flow of current from the coupled inductor into the energy storage capacitor to provide a low impedance current flow path when energy is transferred from the coupled inductor into the capacitor and to provide a high impedance current flow path between the converter DC voltage input terminals and the energy storage capacitor when energy is transferred from the capacitor into the strobe flash lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.