Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1997-06-17
1999-03-16
Pascal, Robert
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315246, H01J 6182
Patent
active
058834753
ABSTRACT:
The present invention utilizes the natural damping of acoustic compression waves within an gas discharge tube, typically a high intensity discharge ("HID") lamp, to avoid resonant acoustic waves having sufficient amplitude to affect adversely the performance or lifetime of the HID lamp. The energy delivered to the HID lamp during each half-cycle of driving power is measured and adjusted such that the total time-averaged power delivered to the lamp remains constant at the lamp's rated power level, but the energy delivered to the discharge gas during each half-cycle is maintained below that level of half-cycle energy delivery at which acoustic resonance will overcome damping and build to harmful levels of amplitude. This is accomplished according to the present invention by varying the frequency of the applied electrical power. For a constant time-averaged power delivered to the lamp, increasing the frequency necessarily entails a reduction in the energy delivered per cycle. The present invention relates to maintaining constant power in a HID lamp yet avoiding acoustic resonance by dynamic adjustment of the frequency and power per cycle such that the acoustic wave amplitudes, determined by the power per cycle, is held to a level at which the natural damping mechanisms of the tube will suppress resonance.
REFERENCES:
patent: 4170746 (1979-10-01), Davenport
patent: 5623187 (1997-04-01), Caldeira et al.
Bettendorf Justin P.
Delta Power Supply, Inc.
Pascal Robert
LandOfFree
Method of avoiding acoustic compression wave resonance in high f does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of avoiding acoustic compression wave resonance in high f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of avoiding acoustic compression wave resonance in high f will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-820503