Title :
Analysis and design of dimmable electronic ballasts for fluorescent lamps using fuzzy controller
Author :
Wu, T.-F. ; Yu, T.-H. ; Hung, J.-C. ; Yang, H.-P.
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Cheng Univ., Taiwan, China
Abstract :
In this paper, a rule-base fuzzy logic controller (FLC) used for controlling the output power of a series resonant parallel loaded (SRPL) inverter which is applied for dimmable electronic ballasts is presented. A plasma model of a fluorescent lamp is introduced as the load of the SRPL inverter. The component values of the power stage as well as two switching frequencies according to desired two distinct power levels can be, therefore, determined. The output power of the lamp is controlled by varying the ratio of two time intervals for which the two frequencies last respectively. This mechanism is achieved by using a 25-rule fuzzy FLC. A prototype with the FLC which is implemented on an 8-bit microprocessor with a reduced instruction set computer (RISC) architecture is built. The experimental measurements are used to verify the analyses
Keywords :
DC-AC power convertors; control system analysis; control system synthesis; digital control; fluorescent lamps; fuzzy control; invertors; lamp accessories; lighting control; microcomputer applications; power engineering computing; resonant power convertors; voltage control; 8 bit; RISC architecture; component values; control design; control simulation; dimmable electronic ballasts; fluorescent lamps; microprocessor; plasma model; power levels; power stage; rule-base fuzzy logic controller; series resonant parallel loaded inverter; switching frequencies; Electronic ballasts; Fluorescence; Fluorescent lamps; Fuzzy logic; Inverters; Plasmas; Power generation; Prototypes; Resonance; Switching frequency;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1996. APEC '96. Conference Proceedings 1996., Eleventh Annual
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-3044-7
DOI :
10.1109/APEC.1996.500509
