期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Frequency and voltage-dependent electrical and dielectric properties of Al/Co-doped PVA/p-Si structures at room temperature
1
作者 Ibrahim Ycedag Ahmet Kaya +1 位作者 Semsettin Altindal Ibrahim Uslu 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第4期545-550,共6页
In order to investigate of cobalt-doped interracial polyvinyl alcohol (PVA) layer and interface trap (Dit) effects, A1/p- Si Schottky barrier diodes (SBDs) are fabricated, and their electrical and dielectric pro... In order to investigate of cobalt-doped interracial polyvinyl alcohol (PVA) layer and interface trap (Dit) effects, A1/p- Si Schottky barrier diodes (SBDs) are fabricated, and their electrical and dielectric properties are investigated at room temperature. The forward and reverse admittance measurements are carded out in the frequency and voltage ranges of 30 kHz-300 kHz and -5 V-6 V, respectively. C-V or er-V plots exhibit two distinct peaks corresponding to inversion and accumulation regions. The first peak is attributed to the existence of Dit, the other to the series resistance (Rs), and interfacial layer. Both the real and imaginary parts of dielectric constant (er and err) and electric modulus (Mr and Mrr), loss tangent (tan~), and AC electrical conductivity (aac) are investigated, each as a function of frequency and applied bias voltage. Each of the M~ versus V and Mrr versus V plots shows a peak and the magnitude of peak increases with the increasing of frequency. Especially due to the Dit and interfacial PVA layer, both capacitance (C) and conductance (G/w) values are strongly affected, which consequently contributes to deviation from both the electrical and dielectric properties of A1/Co-doped PVA/p-Si (MPS) type SBD. In addition, the voltage-dependent profile of Dit is obtained from the low-high frequency capacitance (CLF-CHF) method. 展开更多
关键词 Al/Co-PVA/p-Si (MPS) electrical and dielectric properties AC electrical conductivity frequencyand voltage dependence
原文传递
基于逆变电源的孤岛检测方法研究 被引量:1
2
作者 朱建军 《宁夏电力》 2010年第4期11-14,共4页
分析了现有的孤岛检测方法的优、缺点,提出了频率-功率反馈的逆变器孤岛检测方法。通过研究逆变电源的控制以及反馈原理,采用abc-dq0变换机制实现频率-无功反馈,增加逆变器无功输出与无功负荷的不匹配程度,加速频率变化,使之能够有效检... 分析了现有的孤岛检测方法的优、缺点,提出了频率-功率反馈的逆变器孤岛检测方法。通过研究逆变电源的控制以及反馈原理,采用abc-dq0变换机制实现频率-无功反馈,增加逆变器无功输出与无功负荷的不匹配程度,加速频率变化,使之能够有效检测孤岛。理论分析及PSCAD仿真结果证明,此方法简单有效,能够有效减小检测盲区,且对电能质量影响微弱。 展开更多
关键词 逆变型电源 孤岛检测 abc-dq0变换 频率-功率反馈
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部