全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于输入电压前馈补偿的开关变换器恒定导通时间控制技术

, PP. 18-22

Keywords: 开关变换器,COT控制,IVFC-COT控制,开关频率

Full-Text   Cite this paper   Add to My Lib

Abstract:

针对恒定导通时间(COT)控制开关变换器的开关频率随输入电压变动而变化的缺点,本文提出了一种基于输入电压前馈补偿的恒定导通时间(IVFC-COT)控制技术,通过引入输入电压前馈环路,使恒定导通时间与输入电压成反比,从而消除输入电压波动对开关频率的影响。IVFC-COT控制在继承COT控制环路设计简单,无需误差放大器及其相应的补偿网络,瞬态响应速度快等优点的基础上,使开关频率在输入电压或负载波动时保持恒定。仿真及实验结果验证了IVFC-COT控制技术的可行性。

References

[1]  Hamamura S, Kurose D, Ninomiya T, et al. New control method of piezoelectric transformer converter by PWM and PFM for wide range of input voltage[C]. Proceedings of the IEEE Power Electronics Congress, 2000: 3-8.
[2]  Ridley R B. A new continuous-time model for current-mode control with constant frequency, constant on-time, and constant off-time, in CCM and DCM[C]. Proceedings of the IEEE Power Electronics Specialists Conference, 1990: 382-389.
[3]  Hong S S, Choi B. Technique for developing averaged duty ratio model for DC-DC converters employing constant on- time control[J]. Electronics Letters, 2000, 36(5): 397-1992.
[4]  Wong L K, Man T K. Maximum frequency for hysteretic control COT buck converters[C]. Proceedings of the IEEE Conference on Power Electronics and Motion Control. 2008: 475-478.
[5]  Xu X R, Wu X B, Yan X L. A quasi fixed frequency constant on time controlled boost converter[C]. Proceedings of the IEEE Symposium on Circuits and Systems, 2008: 2206-2209.
[6]  罗萍, 熊富贵, 张波等. PSM开关变换器的平均模型与特性分析[J]. 电工技术学报. 2005 , 20 (3): 19-23.
[7]  Luo Ping, Li Zhaoji, Xiong Fugui, et al. Average mode of PSM switching converter and analysis of its characteristics[J]. Transactions of China Electro- technical Society, 2005, 20(3): 19-23.
[8]  Hamamura S, Kurose D. Piezoelectric transformer AC-DC converter over a worldwide range of input voltage by combined PWM and PFM control[C]. Proceedings of the IEEE Power Electronics Specialists Conference, 2001: 416-421.
[9]  Wong L K, Man T K. LM3102 demonstration board reference design[S]. AN-1646, National Semiconductor, 2007.
[10]  LM2696 3A, Constant on time buck regulator, national semiconductor[S]. Data Sheet of Chip LM2696, 2005.
[11]  沈霞, 王洪诚, 方玮. 基于恒定导通时间的V2控制方法研究[J]. 电测与仪表, 2009, 46(527): 72-76. Shen Xia, Wang Hongcheng, Fang Wei. Research of the V2 control method based on constant on time[J]. Electrical Measurement and Instrumentation, 2009, 46(527): 72-76.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133