Design and Optimization of LLC Resonant Converter for High Power Plant Lamp Power Supply and Dimming Compatibility
HUANG Huiteng
LIU Yingyuan
Abstract：High-power plant lights(300 W～1000 W)require power supplies that meet high efficiency,wide-range dimming,and spectral stability requirements.This paper proposes a power supply design based on LLC resonant converters,focusing on optimizing dimming compatibility strategies.After analyzing the load characteristics and electrical properties of dimming methods for plant lights,we established a mathematical model for LLC resonant converters and designed optimal resonant parameters and topology.By integrating hybrid dimming technology,the system achieves efficiency improvements and suppresses ripple across the 0%-100%dimming range.Experimental results demonstrate that the power supply achieves 94.2%efficiency at rated power of 300 W,with output current ripple under 1.5%during dimming ranges of 10%～100%.The system's compatibility with PWM(100 Hz～20 kHz)and 0～10 V analog dimming protocols ensures spectral stability throughout the plant's growth cycle.
Keywords：high-power plant light power supplyLLC resonant converterdimming compatibility
Publication Date：2025-09-25
Online Publishing Date：2025-10-14(First online date of this platform, not the publication date of the document)
Pages：4( 42-44,57 )