This paper presents some methods of measuring the impedance of noise sources, based on the analysis of the conducted EMI generated by power electronic equipments, then these methods are compared, and their disadvantages are analyzed.
本文基于电力电子装置产生传导电磁干扰机理的分析,针对此噪声源,介绍了多种噪声源阻抗测试方法,进行了比较,分析其存在的不足,在此基础上提出一新方法获得噪声源的信息,为EMI 滤波器设计提供了必要条件。
EMI noise source impedance measurement based on modified dual-current-probe approach
基于改进双电流探头法的EMI噪声源内阻抗测量
It is found in the study that the noise resistance(Rn) obtained through the time domain analysis is an important index for evaluation of corrosion resistance of the material,and that the pitting index(PI) reflects the uniformity degree of electrode reaction on the electrode.
采用同电极体系,测量了电沉积镍、铜镀层以及铂片在HC l和N aC l溶液中的电化学噪声,研究发现:通过时域分析得到的噪声电阻是评价材料耐蚀性的重要指标,而点蚀指数反映了电极表面反应的均匀程度;通过频域分析可知,高频段斜率可以用于评价镀层发生腐蚀的类型,而白噪声水平可作为判断材料耐蚀性的指标之一。
The results showed that the atmospheric corroding process could be effectively detected or monitored by analysis of the electrochemical potential and current noise and the changing of noise resistance.
利用该系统在实验室模拟和户外大气环境下进行了EN测试,研究结果表明,通过电位和电流噪声信号及噪声电阻变化可以对铝合金大气腐蚀过程进行有效检测。
EMI noise source impedance measurement based on modified dual-current-probe approach
基于改进双电流探头法的EMI噪声源内阻抗测量
Influence of Source Parasitic Impedance on AIGaN/GaN HEMTs Microwave Noise Performance
源极寄生阻抗对AlGaN/GaN HEMT微波噪声特性的影响
The exhaust noise is the main source of the cab.
排气噪声是驾驶室内主要噪声来源。
Physically, the resistor is effectively the source of noise.
从物理上来说，电阻器等效于噪声源。
Anti-noise performance of cross voltage measurement pattern in EIT
电阻抗成像交叉测量模式的抗噪声性能研究
Study of Noise Source Identification and Noise Control of IC Engine
内燃机噪声源识别与噪声控制技术研究
Research on Multi-channel Adaptive Active Noise Control Systems for Reducing Vehicle Interior Low Frequency Noise;
车内低频噪声多次级声源有源消声系统研究
Design of Low-Clock Jitter VCO with Strong Ability of Rejecting Power Supply Noise
高抗电源噪声的低时钟抖动VCO设计
internal-noise bandwidth
内噪声[固有噪声]带宽
acoustic impedance density
声阻抗密度，声阻抗率
Interior noise evaluation and noise source identification of a fuel cell vehicle based on psychoacoustic parameters
基于心理声学参数的燃料电池轿车车内噪声评价及噪声源识别
intrinsic impedance
内在阻抗;内阻抗;内禀阻抗;本征阻抗;固有阻抗
ACOUSTIC IMPEDANCE CHANGES IN THE MIDDLE EAR OF GUINEA PIG-AFTER EXPOSURE TO IMPULSE NOISE AND AIR-BLAST
脉冲噪声与空气冲击波暴露后豚鼠中耳声阻抗的变化
And discusses how to control mechanical noise of internal combustion engine after the noise source have been identified.
讨论了如何在识别噪声源之后对内燃机机械噪声进行控制。
An Investigation of Noise Sources and Me-asure of Noise Control in the City Undergro-und Buildings. Chen Yanxun.
城市地下建筑内噪声源调查及建筑噪声控制措施研讨
In the equivalent electrical network the acoustical mass of acoustic leaks is very important for impedance over the range from 250 to 1000Hz under the leakage conditions.
在250～1000赫频段内,声阻抗主要由它决定。
The device is features very high input impedance, super high CMRR, low noise and wide gain bandwidth.
该放大器具有高输入阻抗、高共模抑制比、低噪声和宽频带等特性。
Design and Simulation of An Self-adaptive Impedance Matching Network Model For LNA
一种低噪声放大器的自适应阻抗匹配网络模型的设计