Preconditioner having a digital power factor controller
US6140777A · kind A · utility
17Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast preconditioner serving as a boost regulator which includes a power factor controller. The preconditioner also includes a capacitor for producing a substantially DC voltage and a switch for controlling the amount of energy stored in the capacitor in response to a switching signal. The power factor controller includes a waveform generator having a look-up table for storing values of at least one waveform. The switching signal produced by the power factor controller is based on the at least one waveform accessed from the look-up table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.