Modeling and Analysis of MHz-Frequency PRC-LCLC Resonant Converter Utilizing Only Parasitic Capacitance From Planar Transformer and Cockcroft-Walton Voltage Multiplier as Parallel Capacitor

被引：0

作者：

Wang, Runze ^{[1
,2
]}

Mao, Saijun ^{[3
]}

Yin, Shan ^{[4
]}

Lin, Jinshu ^{[5
]}

Liu, Hongyao ^{[3
]}

Li, Hui

Fan, Jiajie ^{[1
,2
]}

机构：

[1] Fudan Univ, Inst Future Lighting, Acad Engn & Technol, Shanghai Engn Technol Res Ctr SiC Power Device, Shanghai 200433, Peoples R China

[2] Fudan Univ Ningbo, Res Inst, Ningbo 315336, Peoples R China

[3] UniS Technol Shanghai Co Ltd, Shanghai 201210, Peoples R China

[4] Huawei Technol Co Ltd, Shenzhen 518129, Peoples R China

[5] Univ Elect Sci & Technol China, Sch Aeronaut & Astronaut, Chengdu 611731, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2025年 / 40卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Resonant converters; Transformers; Rectifiers; Voltage; Parasitic capacitance; Analytical models; Resonant frequency; Integrated circuit modeling; Zero voltage switching; Capacitors; Cockcroft-Walton (CW) voltage multiplier; gallium nitride (GaN); high frequency; high step-up converter; high-voltage generator; parallel resonant converter (PRC); planar transformer; PRC-LCLC resonant converter; rectified-compensation fundamental mode approximation (RCFMA); DESIGN; APPROXIMATION; PERFORMANCE;

D O I：

10.1109/TPEL.2024.3519356

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：

High-frequency planar transformers and Cockcroft-Walton (CW) rectifiers are essential for developing miniaturized and high-power-density high voltage generators. Parallel resonant converters (PRCs) are commonly used for parasitics integration and high-efficiency operation. However, modeling and designing PRC-LCLC resonant converters with planar transformers and CW voltage multipliers are challenging due to the significant nonlinear parasitics from rectifier diodes and the compensation effects in the resonant tank caused by the discontinuity of rectifier current. To address these challenges, this work proposes a model incorporating nonlinear parasitic capacitance based on the rectified-compensation fundamental mode approximation (RCFMA) method. A novel normalized analysis is conducted on the basis of the resonant frequency of the parallel branch of the RCFMA model, which separates the series-branch-based PRC-LCLC resonant characteristics from the compensation effect of rectifier and nonlinear parasitic capacitance. Furthermore, a voltage-oriented design methodology is introduced. The methodology utilizes the components of the series branch to achieve the step-up voltage gain and zero voltage switching condition for the PRC-LCLC resonant tank. Simultaneously, the parallel branch effectively manages compensation effects and nonlinear parasitic parameters without external capacitors. The proposed design methodology enhances the high-frequency design feasibility, improves the parasitics integration and resolves the conflict between the characteristics design, compensation effects, and the nonlinear parasitic parameters utilization compared to traditional analysis-based designs of PRC-LCLC resonant converters. Finally, the RCFMA model and design methodology are verified through experiments with a gallium nitride-based 25-V/1000-V MHz-frequency PRC-LCLC resonant converter.

引用

页码：5400 / 5411

页数：12