Tilton L Block

age ~78

from Mokena, IL

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Flash Strobe Power Supply System And Method
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US Patent:

20040080282, Apr 29, 2004
Filed:

Oct 29, 2002
Appl. No.:

10/282943
Inventors:

Tilton Block - Frankfort IL, US
Joseph Allison - Euclid OH, US
Assignee:

Federal Signal Corporation - University Drive IL
International Classification:

H05B039/00
US Classification:

315/24100S, 315/276000
Abstract:

A reliable strobe power supply is disclosed that provides requisite light energy for emergency uses without causing EMI problems. A two phase dual flyback power converter operating in transitional mode is disclosed containing a microcontroller that maintains a 180 degree displacement between the two phases by enabling a small, variable dead time between the cessation of stored energy in the flyback transformers and turn-on of the associated power switching transistor for one or the other phases. The power supply is capable of detecting a fault (neoning) and automatically correcting the condition by incrementing the flash capacitor charge off-time delay. The power supply is also capable of tolerating defective (persistently neoning) strobe tubes that cause an inordinate delay in capacitor charging by turning them off.