Title :
Negative incremental impedance and stability of fluorescent lamps
Author :
Deng, Edward ; Cuk, Slobodan
Author_Institution :
GE Corp. R&D, Niskayuna, NY, USA
Abstract :
Fluorescent lamps have a special V-I characteristic. Their incremental impedance is defined and studied in the frequency domain. It is found that the negative incremental impedance of a fluorescent lamp can be characterized by a right half plane zero. The existence of such a result is explained by the modified Francis equation. Two ballasting approaches, series impedance and close-loop operation, are proposed to stabilize lamp operation. Stability criteria based on the Nyquist criterion are developed for both approaches
Keywords :
Nyquist criterion; electric impedance; fluorescent lamps; frequency-domain analysis; lamp accessories; stability; Nyquist criterion; V-I characteristic; ballasting approaches; close-loop operation; fluorescent lamps; frequency domain; modified Francis equation; negative incremental impedance; right half plane zero; series impedance operation; stability criteria; Discharges; Electronic ballasts; Equations; Fluorescent lamps; Frequency domain analysis; Impedance; Mathematical model; Shape measurement; Stability criteria; Steady-state;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3704-2
DOI :
10.1109/APEC.1997.575779
