Energy saving lighting controller
US6046549A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1997 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Sep 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy saving controller system providing, from one power source, one of a plurality of different voltages to a load of electrical energy consuming devices, without power interruption to the load during transition time. The system includes a power switching circuit, a current sensing circuit and a control circuit. The power switching circuit produces, at its output port, one of the different voltages in response to receipt of a control signal of regulated magnitude. The current sensing circuit measures the power switching circuit output current and produces a measured current signal. The control circuit senses an increase in the measured current signal, which indicates an increase in current demand by the load, and outputs a control signal of regulated magnitude to the power switching circuit, initiating the voltage switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.