恒功率输出自耦反激式DC/DC变换器

Constant Power Control Strategy for a Self-coupled Flyback DC-DC Converter

研究了一种自耦反激式DC/DC变换器,可用作小功率高强度气体放电(High Intensity Discharge,简称HID)灯的电子镇流器。针对该电路的结构和工作特性,提出一种由运算放大器根据输入电压和负载变化而引入负反馈,以达到近似恒功率控制的控制策略。实验结果表明,当负载和输入电压在一定范围内变化时,采用该变换器结构和控制策略可使输出功率变化很小,且具有较高的效率。

A self-coupled Flyback DC-DC converter was researched,which can be used in the front-end stages of low power high intensity discharge （HID） lamp ballasts.According to the structure and working characteristics of the converter,a new approximate control strategy was proposed to realize constant power supply.The experimental results show that when the load and input voltage vary within a certain range ,the output power is constant approximately and the efficiency of the converter is high.