Transformer tap switching power supply for LED traffic signal

Details Transformer tap switching power supply for LED traffic signal Transformer tap switching power supply for LED traffic signal

1998-10-09

2000-06-20

Wong, Don

Electric lamp and discharge devices: systems

Current and/or voltage regulation

307115, 307116, 323355, G05F 100

Patent

active

060781483

ABSTRACT:
A transformer T1 having a primary winding and a secondary winding each having a plurality of turns 12 and 14 and a plurality of taps 16, 18, 20, 22 and 24 for changing the number of effective turns 12 and 14 of the primary winding. An array of LEDs 36 produce a luminous output in response to power supplied by the transformer T1. The assembly is characterized by a controller 38 for automatically selecting one of the taps 16, 18, 20, 22 or 24 in response to an operating parameter of the LEDs 36 for maintaining the luminous output of said LEDs 36 above a predetermined level. The measurement of the operating parameter may be any one of or any combination of measuring voltage across the LEDs 36, measuring current through the LEDs 36, measuring the temperature of the LEDs 36, or measuring 40 the luminous output of the LEDs 36.

REFERENCES:
patent: 3944913 (1976-03-01), Kuglar
patent: 4454466 (1984-06-01), Ritter
patent: 4717889 (1988-01-01), Engelmann
patent: 4816738 (1989-03-01), Nicolas
patent: 4896092 (1990-01-01), Flynn
patent: 5170068 (1992-12-01), Kwiatkownski et al.
patent: 5408171 (1995-04-01), Eitzmann et al.
patent: 5581173 (1996-12-01), Yalla et al.
patent: 5633580 (1997-05-01), Trainor et al.
patent: 5661645 (1997-08-01), Hochstein
patent: 5821716 (1998-10-01), Okanik

Affiliated with

Also associated with

Rating

Transformer tap switching power supply for LED traffic signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transformer tap switching power supply for LED traffic signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transformer tap switching power supply for LED traffic signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1855895