Patent · US Active

Preheating circuit for electronic ballast

US9111743B2 · kind B2 · utility

0Cited by

6References

18Claims

0Family size

Assignee

General Electric Company · US

Inventors

Fanbin Wang · Shanghai, CN
Youmin Zhang · Shanghai, CN
Hongbin Wei · Shanghai, CN

Key dates

Filing date	Nov 4, 2013
Grant date	Aug 18, 2015
Priority date	—
Expiry date	Nov 4, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH05B41/295
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A filament preheat module for preheating a filament of a lamp powered by a power circuit including an inverter, the inverter comprising an inductively coupled conductor, an inductively coupled conductor of the filament preheat module magnetically coupled to the inductively coupled conductor of the inverter to power the filament during preheating, and a switching circuit configured to electrically connect the power from the inductively coupled conductor of the filament preheat module to the filament. The switching module is configured to cutoff the power to the filament from the filament preheat module after a predetermined time period during preheating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.