Ballast for high intensity discharging lamp

Details Ballast for high intensity discharging lamp Ballast for high intensity discharging lamp

2006-03-21

2006-03-21

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000

Reexamination Certificate

active

07015657

ABSTRACT:
A ballast includes a power unit for supplying DC, a converting unit having four switches connected to the power unit for converting DC into AC, a voltage-resistant electrocontrol switch connected to the converting unit and having at least one high-voltage diode and an electrocontrol switch, all of which are arranged in parallel, a high-voltage ignition unit connected to the voltage-resistant electrocontrol switch, a current sensor connected to the converting unit, and a control circuit connected to the converting unit, the power unit, the high-voltage ignition unit, and the voltage-resistant electrocontrol switch for manipulating the actions of the aforesaid elements, such that the ballast is in high-voltage and parallel structure. In addition, the electrocontrol switch of the voltage-resistant electrocontrol switch contains inside high-voltage-resistant insulated oil for enabling the voltage-resistant electrocontrol switch to be resistant to high voltage for AC running through.

REFERENCES:
patent: 3974430 (1976-08-01), Tyler et al.
patent: 4506244 (1985-03-01), Jabagchourian et al.
patent: 5068570 (1991-11-01), Oda et al.
patent: 6046549 (2000-04-01), James
J.R. Coaton and A.M. Marsden, Lamps and Lighting, 1997, Arnold and Contributors, 4thedition, pp. 322-324.

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