Electric lighting and power controllers therefor
US5237244A · kind A · utility
43Cited by
11References
20Claims
0Family size
Inventors
Key dates
| Filing date | Jul 15, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jul 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/2576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a lighting power controller having a controllable switch (such as a thyristor), in order to compensate for perturbations in the mains supply waveform, the waveform is analysed and a table is set up of thyristor firing angle against output RMS voltage. To obtain a desired output RMS voltage, the thyristor is fired at the angle indicated by the table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.