数字控制级联式双向DC／DC变换器的研究

Study on the Digital Controlled Two-Stage Bi-directional DC/DC Converter

对由Buck/Boost双向变换器与双向半桥直流变换器构成的级联式双向DC/DC变换器的原理进行了分析,并研究了一种适用于Boost变换器的无源软开关电路。在数字控制的硬件平台之上,提出一端稳压和一端稳流的控制策略,可实现能量双向流动的自由转换。最后给出了实验波形,从而对理论分析进行了验证。

Two-stage Bi-directional DC/DC converter which was composed of Buck/Boost BDC and bi-direetional Half- Bridge DCT was described , a novel reactive-soft-switching boost converter was also introduced. An experimental prototype of bidirectional DC/DC converter controlled by DSP is designed. A novel control scheme adopting one port voltage regulated and another port cun＇ent regulated is proposed to realize the energy conversion in bi-directional freely. In the last, experimental waves verify the theory.