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基于PWM控制的新型极化电源设计与实现 被引量:6
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作者 曾小波 旷永红 《电源技术》 CAS CSCD 北大核心 2015年第1期123-124,132,共3页
在分析比较现有电解槽用极化电源供电电路方案的基础上,提出采用直流斩波调压器替代传统相控整流方式。利用单片机AT89C52,以电压型脉宽调制(PWM)控制器TL494为核心,设计了一种采用整流-斩波变流技术的极化电源,能有效提高功率因数,效... 在分析比较现有电解槽用极化电源供电电路方案的基础上,提出采用直流斩波调压器替代传统相控整流方式。利用单片机AT89C52,以电压型脉宽调制(PWM)控制器TL494为核心,设计了一种采用整流-斩波变流技术的极化电源,能有效提高功率因数,效率高达90%。并给出了主电路仿真和实验系统模拟实验结果。 展开更多
关键词 极化电源 斩波电路 PWM 仿真
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基于TL494控制的大功率极化电源研究 被引量:4
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作者 曾小波 张小平 《电源学报》 CSCD 2015年第1期61-66,共6页
针对目前电化工业电解槽极化电源主电路普遍采用晶闸管相控整流方案存在的不足,提出了采用不可控整流-斩波变流技术的新型主电路方案。设计了系统方案,介绍了系统主电路结构及工作原理,并分析了器件参数及器件选型。阐述控制电路的设计... 针对目前电化工业电解槽极化电源主电路普遍采用晶闸管相控整流方案存在的不足,提出了采用不可控整流-斩波变流技术的新型主电路方案。设计了系统方案,介绍了系统主电路结构及工作原理,并分析了器件参数及器件选型。阐述控制电路的设计及控制方法分析,最后建立仿真模型并进行仿真分析。仿真结果表明:该方案具有输出电压稳定、谐波含量少、动态性能好等特点,能有效提高电源系统功率因数,且效率在97.5%以上,具有较好的应用价值。 展开更多
关键词 极化电源 斩波调压 PWM控制 仿真
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A review of the use of electrospinning in the preparation of flexible lithium-ion batteries
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作者 XING Jia-yi ZHANG Yu-zhuo +1 位作者 FENG Shu-xin JI Ke-meng 《新型炭材料(中英文)》 北大核心 2025年第2期270-292,共23页
Electrospinning technology has emerged as a promising method for fabricating flexible lithium-ion batter-ies(FLIBs)due to its ability to create materials with desir-able properties for energy storage applications.FLIB... Electrospinning technology has emerged as a promising method for fabricating flexible lithium-ion batter-ies(FLIBs)due to its ability to create materials with desir-able properties for energy storage applications.FLIBs,which are foldable and have high energy densities,are be-coming increasingly important as power sources for wear-able devices,flexible electronics,and mobile energy applica-tions.Carbon materials,especially carbon nanofibers,are pivotal in improving the performance of FLIBs by increas-ing electrical conductivity,chemical stability,and surface area,as well as reducing costs.These materials also play a significant role in establishing conducting networks and im-proving structural integrity,which are essential for extend-ing the cycle life and enhancing the safety of the batteries.This review considers the role of electrospinning in the fabrication of critical FLIB components,with a particular emphasis on the integration of carbon materials.It explores strategies to optimize FLIB performance by fine-tuning the electrospinning para-meters,such as electric field strength,spinning rate,solution concentration,and carbonization process.Precise control over fiber properties is crucial for enhancing battery reliability and stability during folding and bending.It also highlights the latest research findings in carbon-based electrode materials,high-performance electrolytes,and separator structures,discussing the practical challenges and opportunities these materials present.It underscores the significant impact of carbon materials on the evolution of FLIBs and their potential to shape future energy storage technologies. 展开更多
关键词 Electrospinning technology Flexible lithium-ion batteries(FLIBs) Carbon material application Nanofiber electrodes Electrochemical energy storage and conversion
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