Single-Chip Group-Asymmetrical Half-Bridge Dimmable Fluorescent Lamp Ballast
碩士 === 國立臺灣科技大學 === 電子工程系 === 94 === This thesis presents a signal processor for realizing a group-asymmetrical PWM controller (GAPWM), which is used to eliminate striation and thermostat effect in a fluorescent lamp. A single-chip programmable controller with assembly language is proposed instead o...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2006
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| Online Access: | http://ndltd.ncl.edu.tw/handle/9shp7u |
| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 94 === This thesis presents a signal processor for realizing a group-asymmetrical PWM controller (GAPWM), which is used to eliminate striation and thermostat effect in a fluorescent lamp. A single-chip programmable controller with assembly language is proposed instead of the analog GAPWM controller. It can make the control strategy of GAPWM more easy to implement and also can programmably spread the odd harmonic energies of the lamp current sharing onto all spectra of the harmonics so as to precisely eliminate striation and thermostat effect. A series-resonant half-bridge electronic ballast is used to examine the performance of the chip processor . Not only the electronic ballast behavior is analyzed but also a design example with experiment and simulation for verifying the theoretical perdition is conducted. Besides, the fluorescent lamps can be dimmed without striation and thermostat effect during a wide range from 1% to 100% of the full luminance.
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