Equivalent Modeling and Analysis Method of Multi-resonant Converter for DC Transformer

ZHAO Baoguo; LI Guodong; CHEN Bo; JI Ruilin; MI Zhaofeng

doi:10.13296/j.1001-1609.hva.2019.09.004

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Equivalent Modeling and Analysis Method of Multi-resonant Converter for DC Transformer

更新时间：2025-04-26

- Equivalent Modeling and Analysis Method of Multi-resonant Converter for DC Transformer
- High VoltageApparatus Vol. 55, Issue 9, Pages: 26-33(2019)
- 作者机构：
  
  1. 国网天津市电力公司城西供电分公司
  2. 国网天津市电力公司电力科学研究院
  3. 天津大学智能电网教育部重点实验室
  4. 国网天津市电力公司客户服务中心
  5. 国网天津市城南供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.09.004
  CLC： TM41
- Published：2019
- 稿件说明：
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[1]赵宝国,李国栋,陈博,冀睿琳,米肇丰.一种可用于直流变压器的多谐振变换器等效建模及分析方法[J].高压电器,2019,55(09):26-33.

ZHAO Baoguo, LI Guodong, CHEN Bo, et al. Equivalent Modeling and Analysis Method of Multi-resonant Converter for DC Transformer[J]. High voltageapparatus, 2019, 55(9): 26-33.
[1]赵宝国,李国栋,陈博,冀睿琳,米肇丰.一种可用于直流变压器的多谐振变换器等效建模及分析方法[J].高压电器,2019,55(09):26-33. DOI： 10.13296/j.1001-1609.hva.2019.09.004.

ZHAO Baoguo, LI Guodong, CHEN Bo, et al. Equivalent Modeling and Analysis Method of Multi-resonant Converter for DC Transformer[J]. High voltageapparatus, 2019, 55(9): 26-33. DOI： 10.13296/j.1001-1609.hva.2019.09.004.

摘要

针对直流变压器对效率和功率密度越来越高的发展需求

大功率谐振变换类拓扑被广泛关注

然而其分析方法特别是针对多谐振变换拓扑的分析方法目前有待进一步研究。文中提出了一种针对于双变压器谐振拓扑的等效建模及分析方法。基于该等效分析方法对CLTC变换器进行简化和增益特性分析

在此基础上

改进并优化获得了一种新型谐振式DC-DC变换器拓扑。该转换器保证高效率和软开关特性的同时进一步优化了变换器增益特性

具有在较窄的频率范围内实现更宽范围电压调节的能力。最后

建立了一台2.5 kW的样机对理论分析进行了验证

样机最高效率为97%。

Abstract

With the increasing demand for efficiency and power density of DC-DC transformers

high-power resonant converter topologies have attracted much attention.However

its analysis methods

especially for multi-resonant converter topologies

need to be further studied.This paper presents an equivalent modeling and analysis method for dual transformer resonant topology.Based on this equivalent analysis method

the simplification and gain characteristics of CLTC converter are analyzed

and a new resonant DC-DC converter is improved and optimized.The converter can not only achieve high efficiency with soft switching characteristics

but further optimizes the gain characteristics.It has the ability to achieve wide range voltage regulation in a narrow frequency range.Finally

a 2.5 kW prototype is built to verify the theoretical analysis

and the maximum efficiency is 97%.

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