研究目的
To evaluate the electric power quality of LEDs by characterizing the LED power factor and quality factor from the available terminal average current, average voltage, and RMS current.
研究成果
The characterization of the LED bandgap power and resistive power has been presented for the calculation of LED power factor and quality factor. Two characterization examples using a single-branch LED approximate linear circuit and a high-order LED piece-wise linear circuit were demonstrated for the calculation of LED power factor and quality factor from the available LED terminal average current, average voltage, and RMS current.
研究不足
The study is limited to the characterization of LED power factor and quality factor using specific circuit models and does not explore the impact of other circuit configurations or environmental factors on LED performance.
1：Experimental Design and Method Selection:
The study uses a single-branch LED approximate linear circuit and a high-order LED piece-wise linear circuit to characterize the LED power factor and quality factor.
2：Sample Selection and Data Sources:
The study assumes parameters for the approximate linear circuit and uses simulation results for the piece-wise linear circuit.
3：List of Experimental Equipment and Materials:
The study mentions the use of a Buck-type LED driver circuit for Simplis simulation.
4：Experimental Procedures and Operational Workflow:
The study calculates the average powers, forward voltage, series resistance, bandgap power, resistive power, power factor, and quality factor from the available LED terminal voltage and current.
5：Data Analysis Methods:
The study uses matrix expressions and derived equations to analyze the experimental data.
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