广东工业大学学报 ›› 2017, Vol. 34 ›› Issue (02): 69-73.doi: 10.12052/gdutxb.160064

• 综合研究 • 上一篇    下一篇

轻载下不存在电流倒灌现象的正激同步整流电路研究

孙安全, 陈林海, 潘永雄   

  1. 广东工业大学 物理与光电工程学院, 广东 广州 510006
  • 收稿日期:2016-04-26 出版日期:2017-03-09 发布日期:2017-03-09
  • 作者简介:孙安全(1987-),男,硕士研究生,主要研究方向为开关电源技术.
  • 基金资助:

    广东省高等学校学科建设专项资金资助项目（2014KTSCX058）；中山市科技强企项目（2013B3FC0002）

A Study of Non-existent Current Intrusion in Forward Synchronous Rectifier Circuit under the Condition of Light Load

Sun An-quan, Chen Lin-hai, Pan Yong-xiong   

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2016-04-26 Online:2017-03-09 Published:2017-03-09

HTML

PDF (PC)

3273

摘要：

为解决轻载下正激变换器电压自驱动同步整流电路Buck滤波电感电流倒灌造成电路效率下降问题，本文在分析了常用正激变换器拓扑去磁复位时间与Buck滤波电感电流回零时间关系基础上，找出了电流倒灌原因，提出了在承担续流功能的同步整流MOS管驱动电路中增加有源快速放电电路，使主变压器激磁磁通复位后强迫同步整流MOS管迅速截止，避免轻载下电感电流倒灌现象.试验样机测试结果表明：本文提出的同步整流驱动方式可行、有效.

关键词: 工业电源, 正激变换器, 同步整流, DCM模式, 电感电流倒灌

Abstract:

To overcome the reduction of efficiency of circuit caused by the Buck filter inductor current flow backward in the circuit of voltage self-driven synchronous rectifier under light load, the relation between the demagnetization reset time of common forward converter topology and the current of Buck filter inductor back to zero time is analyzed. Based on this relation, the reason of the Buck filter inductor current flowing backward so that the forward converter with voltage self-driven synchronous rectifier circuit works at light load have been found. An active fast discharge circuit is proposed to be added in synchronous rectifier MOS transistor driven circuit whose function is freewheeling. And this circuit forces synchronous rectifier MOS to close rapidly after the magnetic field flux of main transformer reset. Thus it can prevent the inductor current flow backward. The prototype test results show that this design has been verified effective and feasible by the experiment result.

Key words: industrial power, forward converter, synchronous rectification, DCM mode, inductor current intrusion

中图分类号: 

  • TM502

[1] 张登. 同步整流技术的研究[J]. 舰船电子对抗, 2014, 37(3):109-111.ZHANG D. Research into synchronous rectification technology[J]. Shipboard Electronic Countermeasure, 2014, 37(3):109-111.
[2] 曹伟杰, 任小永, 阮新波. 同步整流技术在正激变换器中的应用研究[J]. 电力电子, 2010, 08(3):39-44.CAO W J, REN X Y, RUAN X B. Research on the application of synchronous rectification technology in forward converter[J]. Power Electronics, 2010, 08(3):39-44.
[3] 钟才惠, 王德贤, 王之纯. 同步整流技术在低压大电流电源模块中的应用[J]. 电源技术, 2013, 37(5):857-859.ZHONG C H, WANG D X, WANG Z C. Application of synchronous rectification technology in low-voltage and high-current power supply Module[J]. Chinese Journal of Power Source, 2013, 37(5):857-859.
[4] ABRAMOVITZ A, TANG C, SMEDLEY K. Analysis and design of forward converter with energy regenerative snubber[J]. IEEE Transactions on Power Electronics, 2010, 25(3):667-676.
[5] PARK K B, KIM C E, MOON G W, et al. Three-switch active-clamp forward converter with Lowswitch voltage stress and wide ZVS range for high-input-voltage applications[J]. IEEE Transactions on Power Electronics, 2010, 25(4):889-898.
[6] ZHOU X W, DONATI M, AMOROSO L, et al. Improved light-load efficiency for synchronous rectifiervoltage regulator module[J]. IEEE Transactions on Power Electronics, 2000, 15(5):826-834.
[7] 黄苏平, 冯全源. 一种同步BUCK变换器反向限流电路的设计[J]. 微电子学与计算机, 2014, 31(2):35-38.HUANG S P, FENG Q Y. Design of a limiting reverse current circuit for synchronous BUCK converter[J]. Microelectronics & Computer, 2014, 31(2):35-38.
[8] 邓超玄. 同步整流BUCK型DC-DC过零检测电路设计[D]. 成都:西南交通大学信息科学与技术学院, 2014.
[9] 周朝阳, 冯全源. 一种低功耗同步BUCK芯片的过零检测电路设计[J]. 电源技术与应用, 2015, 41(11):118-120+131.ZHOU C Y, FENG Q Y. Design of a zero-crossing detection circuit for low-power synchronous BUCK converter[J]. Application of Electronic Technique, 2015, 41(11):118-120+131.
[10] 谢运祥, 王浩. 正激式变换器轻载条件下的同步整流分析[J]. 华南理工大学学报(自然科学版), 2003, 31(1):60-64.XIE Y X, WANG H. Synchronous rectifier analysis of forward converter under the condition of light load[J]. Journal of South China University of Technology (Natural Science), 2003, 31(1):60-64.
[11] 丁志亮. 双管正激同步整流变换器的研究[D]. 武汉:华中科技大学电气与电子工程学院, 2006.
[12] 陈坚. 电力电子学--电力电子变换和控制技术:第2版[M]. 二版. 北京:高等教育出版社, 2004.
[13] 胡宗波, 张波. 同步整流器中MOSFET的双向导电特性和整流损耗研究[J]. 中国电机工程学报, 2002, 22(3):88-93.HU Z B, ZHANG B. Research on bidirectional conduction characteristics and commutation losses of MOSFET in synchronous rectifier[J]. Proceedings of the Chinese Society for Electrical Engineering, 2002, 22(3):88-93.
[14] 贺东. 基于同步整流技术的有源钳位正激变换器的研究[D]. 成都:电子科技大学通信与信息工程学院, 2014.
[15] 吴琼, 陈立剑. 轻载下的正激同步整流变换器分析[J]. 电源技术应用, 2007, 10(3):33-35.WU Q, CHEN L J. Analysis of the forward converter with synchronous rectification under light load[J]. Power Supply Technologies and Applications, 2007, 10(3):33-35.
[16] 潘永雄. 开关电源技术与设计[M]. 西安:西安电子科技大学出版社, 2016.
[17] 严尔梅, 韦远武, 虢韬, 等. 一种适用于同步整流开关电源的过零检测电路[J]. 电子技术应用, 2013, 39(8):47-49+53.YAN E W, WEI Y W, GUO T, et al. Design of a zero-detect circuit for synchronous rectification mode switching power supply[J]. Application of Electronic Technique, 2013, 39(8):47-49+53.
No related articles found!
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 2017 《广东工业大学学报》编辑部
地址：广州市东风东路729号广东工业大学 邮编：510090
电话：020-37626653,020-37626139,020-37626396
邮箱：xbzrb@gdut.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发