基于部分功率调节的高调压速率DC/DC变换器

Partial Power Conversion Based DC/DC Converter with Fast Voltage Regulating

应用于5G基站的通信电源可在设备待机时降低输出电压来减少能耗,然而输出电压的频繁快速调节给变换器带来挑战。针对这一问题,采用部分功率调节的思想,在变换器输出端构造部分电压调节电路,对电压调节电路采用电压外环电流内环、负载电流前馈以及输出电压前馈控制,使变换器获得电压快速调节的能力且保持较高的能量转换效率。搭建1kW实验样机,验证了所选拓扑以及控制策略的有效性。

The telecommunication power supply applied in 5G base stations can save energy consumption by reducing the output voltage when the equipment works in standby state.Nevertheless,frequent and rapid output voltage regulating of the converters is challenging.To solve this problem,the concept of partial power conversion was adopted in the design of power supply converters.A partial voltage regulating circuit was added at the output side of the converter,and fast output voltage regulating was realized with control of outer voltage loop,inner current loop,load current feedforward and output voltage feedforward loop.At the same time,higher energy conversion efficiency was guaranteed.A 1 kW DC/DC converter was built and verified the effectiveness of the proposed topology and control strategy.