研究目的
Investigating the design and performance of a single stage high brightness LED driver with improved power quality parameters such as total harmonic distortion (THD) and power factor (PF).
研究成果
The proposed single stage LED driver based on Zeta topology operating in CCM with a PI controller achieves stable operation with improved power quality parameters (THD and PF) under the limit of IEC 61000-3-2 standards. The design is suitable for universal ac input mains and offers a cost-effective solution for LED lighting applications.
研究不足
The study is based on simulation results and may require experimental validation for practical applications. The design is focused on low power applications and may not be directly scalable to higher power levels without modifications.
1：Experimental Design and Method Selection:
The study employs a Zeta converter operating in continuous conduction mode (CCM) for maintaining desired output voltage, with a PI controller in the feedback for system stability.
2：Sample Selection and Data Sources:
The simulation model is carried out in MATLAB/SIMULINK using sim-power toolbox environment for a universal ac input mains.
3：List of Experimental Equipment and Materials:
Components include a diode bridge rectifier (DBR), PFC Zeta dc-dc Converter, PI Voltage Controller, and PWM Wave Generator.
4：Experimental Procedures and Operational Workflow:
The system is simulated to maintain a constant current of
5：4amp at output with improved power quality parameters. Data Analysis Methods:
Stability analysis is performed using small signal average modeling and MATLAB tool for frequency response.
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