Cascaded High Voltage Conversion Ratio Bidirectional Nonisolated DC-DC Converter With Variable Switching Frequency

被引：49
作者：
Chen, Jianliang [1 ]
Sha, Deshang [1 ]
Yan, Yu [1 ]
Liu, Bin [2 ]
Liao, Xiaozhong [1 ]
机构：
[1] Beijing Inst Technol, Sch Automat, Adv Power Convers Ctr, Beijing 100081, Peoples R China
[2] Noveri, Beijing 100072, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2018年 / 33卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Bidirectional dc-dc; dynamic frequency modulation; full-range ZVS; high voltage conversion ratio (VCR); nonisolated; INTEGRATED STARTER-GENERATOR; ENERGY-STORAGE SYSTEMS; ELECTRIC VEHICLES; COUPLED-INDUCTOR; PFC CONVERTERS; GAIN;
D O I：
10.1109/TPEL.2017.2679105
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, a multistage nonisolated high voltage conversion ratio (VCR) bidirectional dc-dc converter is proposed. The VCR is n times of the conventional buck/boost converter using only n + 2 switches. All the switches can achieve full-range zero voltage switching (ZVS) despite the power flow direction. The operating principle, ZVS condition, and design considerations of a four-stage topology are analyzed in detail. In addition, an improved dynamic switching frequency modulation is proposed to reduce the power loss. Analyses and comparisons between the conventional constant frequency and variable frequency control are made to show the effectiveness. A 500-W experimental prototype interfacing 20-30 V with 270 V is fabricated to verify the performance of the proposed converter and control strategy.
引用
收藏
页码：1399 / 1409
页数：11
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