Power Loss Estimation in LLC Synchronous Rectification Using Rectifier Current Equations

被引：17

作者：

Glitz, Ettore Scabeni ^{[1
]}

Hsu, Jhih-Da ^{[1
]}

Ordonez, Martin ^{[1
]}

机构：

[1] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC V6T 1Z4, Canada

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2020年 / 67卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

First harmonic approximation; LLC resonant converter; LLC synchronous rectification (SR); MOSFET design tool; power losses; SR; STEADY-STATE ANALYSIS; DC-DC CONVERTER; RESONANT CONVERTER; DRIVING SCHEME;

D O I：

10.1109/TIE.2019.2917372

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In past years, LLC resonant converters have become a mainstream topology for dc-dc power conversion due to their advantages, such as the superior efficiency obtained with the soft switching of MOSFETs. In order to further improve the efficiency of the converter, synchronous rectification (SR) can be implemented as an alternative for diode rectification. As a result, the vast majority of the literature related to this field of study presents different LLC SR control algorithms, which aim to improve the operation of the rectification. Unlike prior work on SR controllers, this paper contributes to the area of power loss estimation using rectifier current equations (RCE). The developed method based on time-domain analysis of SR currents provides a new analytical framework to characterize the behavior of SR. Implications in SR power losses of different time delays are investigated using the developed loss estimation method. In addition, different converter design parameters, such as choice of inductance ratio, can be analyzed. The RCE captures the true discontinuous and complex behavior of SR, which is often oversimplified by the conventional first-harmonic approximation (FHA). As a result, the proposed method facilitates the design of LLC resonant converters and provides increased precision in SR power loss estimation when compared to FHA, and in a considerably faster fashion when compared with precise yet computationally intensive simulation software. This paper is validated with simulation and experimental results.

引用

页码：3696 / 3704

页数：9

共 30 条

[1]

Abe S, 2013, APPL POWER ELECT CO, P1370, DOI 10.1109/APEC.2013.6520478

[2]

Agrawal B, 2017, APPL POWER ELECT CO, P2664, DOI 10.1109/APEC.2017.7931075

[3]

[Anonymous], 2017, AEIT INT ANN C AEIT

[4]

[Anonymous], 2012, 2012 IEEE 13 WORKSH

[5]

Chen Zhao, 2009, Proceedings of the 2009 IEEE Energy Conversion Congress and Exposition. ECCE 2009, P766, DOI 10.1109/ECCE.2009.5316542

[6] PARALLEL-MODE EXTENDED-PERIOD QUASI-RESONANT CONVERTER [J].

CHENG, KWE ;

EVANS, PD .

IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, 1991, 138 (05) :243-251

[7] Design of a 2.5-kW 400/12-V High-Efficiency DC/DC Converter Using a Novel Synchronous Rectification Control for Electric Vehicles [J].

Duan, Chen ;

Bai, Hua ;

Guo, Wei ;

Nie, Zhong .

IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION, 2015, 1 (01) :106-114

[8]

Fang ZJ, 2013, APPL POWER ELECT CO, P2106, DOI 10.1109/APEC.2013.6520586

[9]

Glitz ES, 2018, APPL POWER ELECT CO, P464, DOI 10.1109/APEC.2018.8341052

[10]

Hong L, 2016, IEEE IND ELEC, P2452, DOI 10.1109/IECON.2016.7794135

← 1 2 3 →