A bidirectional isolated DC/DC converter as a core circuit for 3.3‐kV/6.6‐kV power conversion systems in the next generation
A bidirectional isolated DC/DC converter as a core circuit for 3.3‐kV/6.6‐kV power conversion systems in the next generation
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作为下一代 3.3kV/6.6kV 功率转换系统核心电路的双向隔离 DC/DC 转换器
DOI：
10.1002/eej.20505
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发表时间：
2008
影响因子：
0.4
通讯作者：
H. Akagi
中科院分区：
文献类型：
--
作者：
S. Inoue;H. Akagi
介绍了一种双向隔离DC/DC转换器，它被认为是下一代3.3kV/6.6kv高功率密度功率变换系统的核心电路。DC/DC转换器旨在使用基于SIC和/或GaN的功率开关器件，该器件将在不久的将来上市。本文设计了一种350V、10kW、20 kHzDC/DC转换器，并对其进行了测试。它由两个采用最新槽栅硅IGBT的单相全桥转换器和一个带有纳米晶软磁材料铁心和LITZ导线的20 kHz变压器组成。在实现两个全桥变流器之间的电气隔离方面，变压器起着至关重要的作用。从DC输入端到DC输出端的总效率被准确地测量到高达97%，不包括栅极驱动电路和控制电路的损耗。此外，还进行了损耗分析，以评估使用碳化硅功率开关器件的有效性。损耗分析表明，使用基于碳化硅的功率器件可以显著降低DC/DC转换器的导通和开关损耗。因此，整体效率可能达到99%或更高。《威利期刊杂志》，163(2)：75-83,2008；在线发表在《威利国际科学》(www.intercience.wiley.com)上。DOI 10.1002/eej.20505
This paper describes a bidirectional isolated DC/DC converter considered as a core circuit for next‐generation 3.3‐kV/6.6‐kV high‐power‐density power conversion systems. The DC/DC converter is intended to use power switching devices based on SiC and/or GaN, which will be available on the market in the near future. A 350‐V, 10‐kW, and 20‐kHz DC/DC converter is designed, constructed, and tested in this paper. It consists of two single‐phase full‐bridge converters with the latest trench‐gate Si‐IGBTs and a 20‐kHz transformer with a nano‐crystalline soft‐magnetic material core and litz wires. The transformer plays an essential role in achieving galvanic isolation between the two full‐bridge converters. The overall efficiency from the DC‐input to DC‐output terminals is accurately measured to be as high as 97%, excluding gate drive circuit and control circuit losses from the whole loss. Moreover, loss analysis is carried out to estimate effectiveness in using SiC‐based power switching devices. The loss analysis clarifies that the use of SiC‐based power devices may bring a significant reduction in conducting and switching losses to the DC/DC converter. As a result, the overall efficiency may reach 99% or higher. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 163(2): 75–83, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20505