基于TPS的双向全桥DC/DC最小回流功率控制

Minimum Backflow Power Control of Bi-directional DC/DC Converters Based on Triple Phase-shifting Control

三重移相控制(TPS)引入了内部移相角,使得移相控制具有3个自由度,因此可改善全桥DC/DC变换器的功率调节范围。通过分析TPS下双向DC/DC变换器的工作原理,建立了变换器输出功率和回流功率的数学模型,并分析了3个移相比参数对输出功率的影响,在此基础上提出了基于最小回流功率控制的TPS策略。最后,将所提控制策略应用于实验样机,并与单移相控制(SPS)和双重移相控制(DPS)进行了比较,实验结果表明,基于最小回流控制的TPS策略可有效提高变换器的效率。

Triple phase-shifting control（TPS） introduces an internal phase-shifting angle, which allows the phase-shifting control to have three degrees of freedom, thus can be used to improve the power range of full-bridge DC/DC con- verters.By analyzing the working principle of the bi-direetional DC/DC converter under the TPS,the mathematical mo- dels of the output power and the backflow power are established.The influence of the TPS parameters on the output power is analyzed.On this basis, TPS strategy with the minimum backflow power for hi-directional DC/DC converter is proposed.At last, based on an experimental prototype, compared with single phase-shifting control（SPS） and dual phase- shifting control （DPS）, the effectiveness of the TPS strategy to improve the efficiency of converters is verified.