基于DSP控制的双向DC/DC变换器研究

Study of the DSP Controlled Bi-directional DC/DC Converter

分析了由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变换器原理;研究了适用于Boost变换器的无源软开关电路。在数字控制的硬件平台基础上,提出了一种一端稳压、一端稳流的控制策略,实现了能量双向流动的自由转换。最后给出了实验波形;验证了理论分析。

Two-stage bi-directional DC/DC converter which is composed of Buck/Boost BDC and bidirectional HalfBridge DCT is described, a novel reactive-soft-switching Boost converter is also introduced in this article.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 current regulated is proposed to realize the energy conversion in bi-directional freely.In the end, the experimental waves verify the theory.