A new multiport non-isolated bidirectional dc/dc converter with zero voltage switching and free ripple input currents
A new multiport non-isolated bidirectional dc/dc converter with zero voltage switching and free ripple input currents
复制标题
具有零电压开关和无纹波输入电流的新型多端口非隔离双向 DC/DC 转换器
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Pedram Chavoshipour Heris
中科院分区：
文献类型：
--
作者：
S. Hosseini;Zahra Saadatizadeh;Pedram Chavoshipour Heris
本文提出了一种多端口非隔离双向dc-dc变换器。该变换器具有主开关的零电压开关能力、辅助开关的零电流开关能力、消除输入纹波和端口间的双向潮流等优点。通过采用电感和电容的逆耦合，降低了低电压侧输入电流纹波。为了实现各级主开关的零电压开关，采用了由一个辅助电感、两个开关和两个二极管组成的辅助电路。本文对变换器的各种工作模式、电压转换比、开关达到ZVS工作的条件、所有开关的电压和电流应力以及升压和降压工作中消除输入电流纹波的条件进行了理论分析。最后，为了验证理论结果的有效性和变换器的性能，在EMTDC/PSCAD软件中给出了该变换器的仿真结果。
In this paper, a multi-port non-isolated bidirectional dc-dc converter is proposed. Some privileges of the proposed converter are included the capability of zero voltage switching for main switches, capability of zero current switching for the auxiliary switches, cancelling input currents ripple and bidirectional power flow between the ports. By using an inverse coupled inductor and a capacitor the input currents ripple at low voltage side are reduced. In order to achieve zero voltage switching of the main switches in each stages, an auxiliary circuit which is consists of an auxiliary inductor, two switches and two diodes is utilized. In this paper, theoretical analysis for all operating modes of the converter, voltage conversion ratio, required conditions for attaining ZVS operation of switches, voltage and current stresses of all switches, also, the required condition for cancelling input currents ripple in both boost and buck operations are presented. Finally, to testify the validity of theoretical results and demonstrate the performance of the converter, simulation results of the proposed converter in EMTDC/PSCAD software are presented.