提出一种电流型Boost半有源倍压整流变换器,二次侧整流桥只有一个二极管承受输出电压,其余半导体器件和变压器二次绕组电压应力为输出电压的1/2。通过降低变压器匝比和减小其寄生参数,以及使用具有较小关断损耗和低导通电阻的低压器件,提高变换器在高频轻载时的效率。在一次侧占空比控制和二次侧移相控制基础上,分析其功率特性、软开关约束条件以及交错电流纹波特性,对比其与传统半有源变换器的性能,并搭建50 kHz/1 kW实验样机,来验证理论分析。
Abstract
This paper presents a current-fed interleaved high-gain DC-DC converter with semi-active voltage-double rectifier. Only one secondary diode bears the output voltage, the transformer ratio and the voltage stress of the secondary switches have been reduced by half. Therefore, the efficiency is improved by using a transformer with a smaller turn’s ratio and low-voltage rating devices at high frequencies and light loads. Primary PWM and secondary phase shift control was used. Furthermore, the power characteristics, soft switching constraints, and interleaved current ripple characteristics are analyzed. The performance of semi-active rectifier is compared to the traditional converters. Finally, the 50 kHz/1 kW converter was designed for experimental verification.
关键词
升压变换器 /
高增益 /
电压应力 /
半有源倍压整流 /
关断损耗
Key words
boost converter /
high gain /
voltage stress /
semi-active voltage-double rectifier /
turn-off loss
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基金
国家自然科学基金（52077055）;天津市自然科学基金（22JCZDJC00950）;中央引导地方项目（226Z1601G）
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