High-power electronic ballast for fluorescent lamp
US6600273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2001 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Aug 6, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a high-power ballast inexpensively applicable to a fluorescent lamp of the 28-Watt class without any increase in the number of constituent elements used or any complexity in the manufacturing process. The high-power ballast includes a rectifier circuit for rectifying a low-frequency AC voltage to convert it into a direct current DC voltage, a power factor compensation circuit for compensating a power factor for the voltage outputted from the rectifier circuit, thereby boosting the level of the output voltage, the power factor compensation circuit including an active type power factor driver, and an inverter circuit for converting the DC voltage, outputted from the power factor compensation circuit, into a desired high-frequency AC voltage. The inverter circuit includes an inverter, a resonator circuit connected to the inverter, and a high-power piezoelectric transformer having an input terminal connected to the resonator circuit and an output terminal connected to the fluorescent lamp. The high-power piezoelectric transformer is made of a composition expressed by the following chemical formula: The high-power piezoelectric transformer serves to apply, as a drive voltag…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.