研究目的
Investigating the disturbances produced by fluorescent tubes and LED tubes, focusing on harmonic analysis of the supply current.
研究成果
Both fluorescent and LED tubes produce electromagnetic disturbances, with distorted currents containing significant harmonics. The fluorescent tube's harmonics are within norm limits for a single tube, but cumulative effects from many tubes are concerning. The LED tube shows higher harmonic distortion than the fluorescent tube. The developed monitoring system and program are effective for such analyses.
研究不足
The study focuses on specific tube types (18 W fluorescent and 8 W LED) and may not generalize to all tube variations. The experimental setup uses particular equipment, and disturbances from multiple tubes in a system are noted but not deeply analyzed.
1：Experimental Design and Method Selection:
The study uses a data acquisition board and a harmonic analyzer to monitor and analyze current waveforms and harmonic content in fluorescent and LED tubes. The experimental schemes include circuits for each tube type with components like ballasts, starters, and current transformers.
2：Sample Selection and Data Sources:
Two types of tubes are used: an 18 W fluorescent tube and an 8 W LED tube, both with the same dimensions and shape. Data is acquired during priming, steady state, and for out-of-order states.
3：List of Experimental Equipment and Materials:
Includes a KPCI 3102 data acquisition board, harmonic analyzer (Fluke Model 41B), current transformer with Hall probe, fluorescent tube, LED tube, ballast, starter, and connecting blocks.
4：Experimental Procedures and Operational Workflow:
The tubes are connected to the monitoring system. Current is measured using the data acquisition board and harmonic analyzer. Waveforms and harmonic spectra are recorded for different operational states.
5：Data Analysis Methods:
Harmonic analysis is performed to quantify distortion and harmonic orders. Results are compared to international norms (e.g., NF C 71-212) for electromagnetic compatibility.
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