共查询到20条相似文献,搜索用时 78 毫秒
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综合评述诸如肖特基势垒二极管、pn结二极管、功率MOS、功率JFET、BJT、GTO、GCT以及功率模块等各种碳化硅电力电子器件研究开发的最新进展及其发展前景,指出碳化硅的优势不仅仅限于能提高功率开关器件的电压承受能力、高温承受能力和兼顾频率与功率的能力,还在于能大幅度降低器件的功率消耗,使电力电子技术的节能优势得以更加充分的发挥;文章还对碳化硅器件在电力电子领域特别是电力变换器方面的初步应用及开发情况也做了简略介绍。 相似文献
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评述了各种碳化硅电力电子器件研究开发的最新进展及其发展前景,指出碳化硅的优势不仅仅限于能提高功率开关器件的电压承受能力、高温承受能力和兼顾频率与功率的能力,还在于能大幅度降低器件的功率损耗,使电力电子技术的节能优势得以更加充分地发挥.针对碳化硅材料的特殊性和实现碳化硅器件卓越性能的需要,分析了器件工艺当前亟待解决的问题. 相似文献
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碳化硅电力电子器件及其制造工艺新进展 总被引:4,自引:1,他引:4
评述了各种碳化硅电力电子器件研究开发的最新进展及其发展前景,指出碳化硅的优势不仅仅限于能提高功率开关器件的电压承受能力、高温承受能力和兼顾频率与功率的能力,还在于能大幅度降低器件的功率损耗,使电力电子技术的节能优势得以更加充分地发挥.针对碳化硅材料的特殊性和实现碳化硅器件卓越性能的需要,分析了器件工艺当前亟待解决的问题. 相似文献
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宽禁带SiC材料被认为是高性能电力电子器件的理想材料,比较了Si和SiC材料的电力电子器件在击穿电场强度、稳定性和开关速度等方面的区别,着重分析了以SiC器件为功率开关的电力电子装置对电力系统中柔性交流输电系统(FACTS)、高压直流输电(HVDC)装置、新能源技术和微电网技术领域的影响。分析表明,SiC电力电子器件具有耐高压、耐高温、开关频率高、损耗小、动态性能优良等特点,在较高电压等级(高于3 kV)或对电力电子装置性能有更高要求的场合,具有良好的应用前景。 相似文献
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SiC电力电子器件喷薄欲发 总被引:1,自引:0,他引:1
以Si为代表的传统半导体电力器件可满足电力电子对功率大、工作速度快、通态电阻小、驱动功率低等方面的应用要求。但是,只有SiC等宽禁带半导体材料才能根本上解决电力电子对高击穿电压高工作温度等方面的要求,并有可能省去过流、过压、过温等保护装置。这主要归功于SiC具有很高的击穿场强良好的热导率和热稳定性。 相似文献
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Superjunction technology is believed to reach the optimal specific on-resistance and breakdown voltage trade-off.It has become a mainstream technology in silicon high-voltage metal oxide semiconductor field effect transistor devices.Numer-ous efforts have been conducted to employ the same concept in silicon carbide devices.These works are summarized here. 相似文献
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Progress in silicon carbide semiconductor electronics technology 总被引:4,自引:0,他引:4
Philip G. Neudeck 《Journal of Electronic Materials》1995,24(4):283-288
Silicon carbide’s demonstrated ability to function under extreme high-temperature, high-power, and/or high-radiation conditions
is expected to enable significant enhancements to a far-ranging variety of applications and systems. However, improvements
in crystal growth and device fabrication processes are needed before SiC-based devices and circuits can be scaled-up and incorporated
into electronic systems. This paper surveys the present status of SiC-based semiconductor electronics and identifies areas
where technological maturation is needed. The prospects for resolving these obstacles are discussed. Recent achievements include
the monolithic realization of SiC integrated circuit operational amplifiers and digital logic circuits, as well as significant
improvements to epitaxial and bulk crystal growth processes that impact the viability of this rapidly emerging technology. 相似文献
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近年来,在社会的进步和科学技术的推动作用下,我国电力电子技术得以迅速发展,且在各行业中得到了广泛的应用。本文主要从电力电子技术在发电环节、输电环节、配电环节和节能环节的运用,以及未来的发展趋势进行探讨。 相似文献
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最近几年我国在电力领域的改革取得了一些新的成就,部分新技术在电力领域被广泛推广和应用.作为现代信息时代和科技时代的今天,电子信息技术的应用成为信息时代的主导应用技术,它的应用对保障电力自动化系统的安全稳定运行加了一把保险锁.新的发展阶段促使电力化系统的程度提高作为主导出现,这就对电力自动化系统中电子信息技术的应用研究提出了新的发展要求,使电子信息技术手段不断优化,不断强化.强化电子自动化系统中电子信息技术的应用理论研究,方能进一步为电力自动化信息系统的可靠性提供运行依据. 相似文献
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本文主要针对电力系统中使用电工电子与网络技术的优势进行分析,分析这两项技术应用的效果,对其中存在的一系列问题进行研究,希望可推动我国电力系统良好稳定的发展下去. 相似文献
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J. P. Henning K. J. Schoen M. R. Melloch J. M. Woodall J. A. Cooper Jr. 《Journal of Electronic Materials》1998,27(4):296-299
This paper presents a study of the rectifying properties of heavily doped polycrystalline silicon (polysilicon) on 4H silicon
carbide (4H-SiC). Current properties and barrier heights were found using analysis of the heterojunction. This revealed that
Schottky analysis would be valid for the large barrier height devices. Isotype and an-isotype devices were fabricated on both
p-type and n-type SiC and the electrical characteristics were investigated using capacitance vs voltage measurements, current
vs voltage measurements (I-V), and temperature I-V measurements. Extraction of the barrier height, built-in potential, and
Richardson constant were made and then compared to theoretical values for the heterojunction. Temperature I-V measurements
demonstrated that the current transport mechanism is thermionic emission, confirming the validity of the Schottky diode model.
The I-V characteristics show near ideal diode rectifying behavior and the capacitance-voltage characteristics show ideal junction
space charge modulation for all polysilicon/SiC combinations. These experimental results match well with heterojunction band-offset
estimated barrier heights and demonstrate that the barrier height of the polysilicon/4H SiC interface may be controlled by
varying the polysilicon doping type. 相似文献
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The electronic transport properties of the armchair silicon carbide nanotube (SiCNT) are investigated by using the combined nonequilibrium Green's function method with density functional theory. In the equilibrium trans-mission spectrum of the nanotube, a transmission valley of about 2.12 eV is discovered around Fermi energy, which means that the nanotube is a wide band gap semiconductor and consistent with results of first principle calculations.More important, negative differential resistance is found in its current voltage characteristic. This phenomenon orig-inates from the variation of density of states caused by applied bias voltage. These investigations are meaningful to modeling and simulation in silicon carbide nanotube electronic devices. 相似文献