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2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)最新文献

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Asymmetric selective harmonic elimination technique using partial derivative for cascaded modular active rectifiers tied to a power grid with voltage harmonics 基于偏导数的级联模块化有源整流器的非对称选择性谐波消除技术
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522923
A. Moeini, Shuo Wang
This paper proposes a real time selective harmonic elimination technique for the current of the active rectifier. The partial derivation technique is applied to the Fourier series equations of voltage waveforms to implement real time SHE technique. In order to control the magnitude and phase of the low order current harmonics of the active rectifier, a new controller is proposed to fully mitigate the 5th and 7th current harmonic orders of the active rectifier even with the influence of grid voltage harmonics. Moreover, in this paper, an asymmetric voltage waveform will be employed to control both the magnitude and phase of the current harmonics of the active rectifier. The proposed technique needs very low memory storage for look-up tables, so it saves a lot of resources for DSP. Finally, the proposed technique is verified by MATLAB/Simulink simulations and experiments. The technique can be extended to eliminate more orders of harmonics.
针对有源整流器的电流,提出了一种实时选择性谐波消除技术。将偏导数技术应用于电压波形的傅立叶级数方程,实现实时SHE技术。为了控制有源整流器低阶电流谐波的幅值和相位,提出了一种新的控制器,可以在电网电压谐波影响下充分缓解有源整流器的5阶和7阶电流谐波。此外,本文将采用非对称电压波形来控制有源整流器电流谐波的幅值和相位。该方法对查找表的内存占用很小,为DSP节省了大量的资源。最后,通过MATLAB/Simulink仿真和实验验证了该技术的有效性。该技术可以扩展到消除更多次谐波。
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引用次数: 4
Dynamic behavior model for SEED analysis; extraction using surface response modelling SEED分析的动态行为模型;利用表面响应模型进行提取
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522821
M. Coenen, Ye Ming, Huichun Yu, Li Ension
System Efficient ESD Design (SEED) requires dynamic behavior models from the devices and circuitry used along the protection chain, typically from the discharge point of entry at the PCB boundary i.e. connector up to the circuits on-chip to be protected. In-between this path there may be external ESD protection i.e. voltage clamping together with parasitic layout effects, interconnect path delay with specific transmission line properties, package design up to on-chip protection design with parasitic layout effects and ultimately the on-chip circuit(s) to be protected, being unpowered or powered.
系统高效ESD设计(SEED)需要沿着保护链使用的器件和电路的动态行为模型,通常从PCB边界的放电点进入,即连接器到要保护的片上电路。在此路径之间可能存在外部ESD保护,即电压箝位和寄生布局效应,具有特定传输线特性的互连路径延迟,封装设计直至具有寄生布局效应的片上保护设计,以及最终要保护的片上电路是断电还是通电。
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引用次数: 5
Research on the distribution of magnetic field around communication tower when struck by lightning 雷击时通信塔周围磁场分布的研究
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522765
L. Kun, Guo Junfeng, Shen Huilian
The communication tower leads to a regional increasing lightning density to a certain extent, which brings about more serious threat of lightning electromagnetic interference and lightning invasion. Since the malfunction or permanent damage of electronic equipment caused by harsh electromagnetic environment is mainly attributed to magnetic field, the magnetic field around the tower is analyzed in detail in this paper. A ten meters high communication station tower model was established by CST studio. Then, the transient electromagnetic response when the tower is struck by lightning directly and the space distribution of magnetic field around the tower were analyzed. The results show that the magnetic fields inside tower are much smaller than outside. And the amplitudes of magnetic fields are not monotonically changing with height.
通信塔在一定程度上导致了区域闪电密度的增加,带来了更严重的闪电电磁干扰和闪电入侵威胁。由于恶劣的电磁环境导致电子设备的故障或永久性损坏主要是由磁场引起的,本文对塔周围的磁场进行了详细的分析。CST工作室搭建了一座10米高的通信站塔模型。然后,分析了塔被雷击时的瞬变电磁响应和塔周围磁场的空间分布。结果表明,塔内磁场比塔外小得多。磁场振幅不随高度单调变化。
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引用次数: 0
High performance lightweight shield made by thin flexible tunable graphene-polymer laminate 高性能轻质屏蔽由薄柔性可调石墨烯-聚合物层压板制成
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7523030
A. D’Aloia, M. D'amore, M. S. Sarto
An innovative lightweight and flexible multilayered screen made by electrically doped graphene sheets laminated with thin films of polyethylene terephthalate (PET) is proposed. The shielding effectiveness (SE) of the screen is computed in the low GHz frequency range assuming that the graphene/PET multilayer is modelled as an equivalent single-layer shield having an effective conductivity. A rigorous simulation model is utilized to define the maximum frequency of applicability of the proposed approximate formulation of the SE. A SE of 40 dB is obtained in a wide frequency range, up to more than 200 GHz, with a screen consisting of 24 graphene layers electrically doped and having a total thickness of 0.69 μm.
提出了一种由掺杂石墨烯片与聚对苯二甲酸乙二醇酯(PET)薄膜层合而成的新型轻质柔性多层屏幕。假设将石墨烯/PET多层模拟为具有有效导电性的等效单层屏蔽,则在低GHz频率范围内计算屏蔽效能(SE)。利用一个严格的仿真模型来确定所提出的SE近似公式的最大适用频率。在200 GHz以上的宽频率范围内获得了40 dB的SE,屏幕由24层电掺杂石墨烯组成,总厚度为0.69 μm。
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引用次数: 3
Study on the brain network following magnetic stimulation of Hegu point based on multi-threshold analysis 基于多阈值分析的和谷穴磁刺激后脑网络研究
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522939
Fu Lingdi, Xu Guizhi, Yu Hongli, Guo Miaomiao, Yin Ning
Acupuncture is effective to treat various diseases. However, the underlying regulation mechanisms of acupuncture remain unclear. In this paper, repeated-pulse magnetic stimulation was used to stimulate the left Hegu (LI4) point of healthy people. EEG signals were recorded before and during magnetic stimulation. Based on the theory of complex network analysis, functional networks under multi thresholds were constructed and the changes in brain connection and topology attributes before and during magnetic stimulation of LI4 were studied. Results showed that the comparison of topology attributes had significant difference between different thresholds and that magnetic stimulation of LI4 changed the connection of brain functional areas related to somatosensory association, auditory association and vision association. It implied that information processing among these functional areas changed, which has probably association with the regulation mechanisms of LI4.
针灸对治疗各种疾病都有效。然而,针灸的潜在调节机制尚不清楚。采用重复脉冲磁刺激法刺激健康人左合谷穴(LI4)。分别记录磁刺激前后的脑电图信号。基于复杂网络分析理论,构建多阈值下的功能网络,研究磁刺激前后脑连接和拓扑属性的变化。结果表明,不同阈值间拓扑属性比较存在显著差异,LI4的磁刺激改变了体感关联、听觉关联和视觉关联相关脑功能区的连接。这表明这些功能区之间的信息处理发生了变化,这可能与LI4的调控机制有关。
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引用次数: 1
New method to validate the performance of SACs from 200 MHz to 1000 MHz 提出了一种新的方法来验证200 ~ 1000 MHz频段的sac性能
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522790
Donglin Meng
An improved method is proposed to adequately validate the performance of a semi-anechoic chamber (SAC) from 200 MHz to 1000 MHz, by replacing the transmit antenna (Tx) from a log-periodic dipole array (LPDA) antenna with a mini-biconical antenna. SACs are widely used to make radiated emission (RE) measurements, and for each SAC, after newly construction or after several years, a validation must be made to make sure it is good enough to make RE measurements. However, in present standard such as CISPR 16-1-4:2012 or ANSI C63.4:2014, a directive antenna, e.g. LPDA is always used as the Tx from 200 MHz / 300 MHz to 1000 MHz. This is based on a questionable assumption that the RE from an equipment under test (EUT) is directional over this frequency band. Comparisons are made by measuring SACs with a LPDA and a mini-biconical antennas as the Tx, respectively. The measured results show that for a good SAC, the performance is slightly degraded once the Tx is changed from a LPDA into a mini-biconical antenna; however, for a compact SAC, the change is fairly larger. This shows the improved method is more sensitive to the real performance of a SAC.
为了充分验证200 ~ 1000 MHz半消声室(SAC)的性能,提出了一种改进的方法,即用微型双锥天线代替对数周期偶极子阵列(LPDA)天线的发射天线(Tx)。SAC被广泛用于辐射发射(RE)测量,对于每一个SAC,在新建或几年后,必须进行验证,以确保它足够好,可以进行RE测量。然而,在目前的标准中,例如CISPR 16-1-4:2012或ANSI C63.4:2014,指令天线,例如LPDA始终用作200 MHz / 300 MHz至1000 MHz的Tx。这是基于一个有问题的假设,即来自被测设备(EUT)的RE在该频段上是定向的。通过分别测量LPDA和微型双锥天线作为Tx的sac进行比较。测量结果表明,对于一个好的SAC,当Tx从LPDA变为微型双锥天线时,性能略有下降;然而,对于紧凑型SAC,变化相当大。这表明改进后的方法对SAC的实际性能更加敏感。
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引用次数: 0
Signal integrity performance degradation due to temperature variation in systems with re-drivers 再驱动系统中温度变化导致的信号完整性性能退化
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522743
Xinjun Zhang, Weifeng Shu, Yinglei Ren, Ye Chunfei, Ye Xiaoning
Re-drivers are widely used in extending the solution space in high speed applications. However, recent lab data shows that the ambient temperature variation can lead to ~40mV degradation of the eye height at the receiver side on single re-driver system. In this paper, the authors will share key learnings of thermal impact on systems with both single re-driver and cascaded re-drivers. From these cases, the eye height is greatly reduced when temperature increases. This variation is due to resistance shifting of the output buffer, while most re-driver models do not account for it. An effective approach is applied to fine tune the equalization settings in the cascaded re-driver system. The learnings, together with the proposed approach, can help designers to design a robust, high performance, and cost-effective high speed link with re-drivers such as SAS-3, SATA-3, PCIe and USB, etc.
重驱动器广泛用于扩展高速应用中的解决方案空间。然而,最近的实验室数据表明,在单重驱动系统中,环境温度的变化会导致接收机侧眼高下降~40mV。在本文中,作者将分享单再驱动和级联再驱动系统的热影响的关键知识。从这些情况来看,当温度升高时,眼睛高度大大降低。这种变化是由于输出缓冲区的电阻转移,而大多数重新驱动模型没有考虑到这一点。采用了一种有效的方法对级联重驱动系统的均衡设置进行微调。这些经验和提出的方法可以帮助设计人员设计出具有SAS-3、SATA-3、PCIe和USB等重新驱动程序的稳健、高性能和经济高效的高速链路。
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引用次数: 2
A photoelectric type tunable frequency probe for near-field EMI measurement 一种用于近场电磁干扰测量的光电式可调频率探头
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522927
Tao Song, Mengjun Wang, Panpan Zuo, Jianying Liu
The accurate measurement of near-field EMI of Printed circuit board (PCB) and electronic equipment is essential nowadays. The photoelectric type probe could provide a better solution to the near-field measurement. In this paper, a combined with copper-clad laminate and electron component, the strip line embedded into PCB basal lamina is designed to get a specific frequency response. However, in consideration of the spatial electro-magnetic disturbance and the high-frequency harmonic jamming from the power supply to the probe, a photoelectric type power supply is proposed to make the power tunable. a structure of the strip line is simulated and analyzed. By changing the value of the patch capacitance between the strip line and the copper-clad laminate, three fixed resonance frequency points are located at 327.046MHz, 1.699GHz and 2.439GHz. The probe proposed in this paper can be widely used in near-field EMI testing.
精确测量印刷电路板(PCB)和电子设备的近场电磁干扰是当今社会必不可少的问题。光电探头可以较好地解决近场测量问题。本文将覆铜板与电子元件相结合,设计了嵌入PCB基板的带状线,以获得特定的频率响应。但是,考虑到空间电磁干扰和电源对探头的高频谐波干扰,提出了一种光电式电源,使功率可调谐。对带钢生产线的结构进行了仿真分析。通过改变带线与覆铜层压板之间的贴片电容值,三个固定的谐振频率点分别位于327.046MHz、1.699GHz和2.439GHz。本文提出的探头可广泛应用于近场电磁干扰测试。
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引用次数: 0
Design of a wideband signal detection circuit for electrical field sensor 一种用于电场传感器的宽带信号检测电路设计
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522719
Zhang Tong, Xie Shuguo
Electrical field sensors are widely used for detecting transient signal in the EMC tests. The traditional method to detect the electrical field sensor signal is single-path detection using spectrum analyzer, which is applicable when the frequency is known. But if the signal is transient during the EMC tests, it often needs to sweep multiple times to detect different frequency points, or test multiple times to get the field at different locations. In this paper, a new method is proposed innovatively for detecting the electrical field sensor signal with wideband signal detection circuit. This circuit consists of a wideband low noise amplifier module and a wideband peak detector module. By using a wideband LNA module, this circuit can achieve high sensitivity detection. And by using a wideband peak detector module, it can realize simultaneous detection of wideband signals. The detailed design of the two modules is shown in this paper. After simulation and testing, it`s proved that the two modules could reach the established targets, and the wideband signal detection circuit can be used for the detection of wideband electrical field sensor signal in EMC tests.
在电磁兼容测试中,电场传感器被广泛用于检测暂态信号。传统的检测电场传感器信号的方法是利用频谱分析仪进行单路检测,适用于频率已知的情况。但在电磁兼容测试过程中,如果信号是瞬态的,通常需要多次扫描以检测不同的频率点,或者多次测试以获得不同位置的场。本文创新性地提出了一种利用宽带信号检测电路检测电场传感器信号的新方法。该电路由宽带低噪声放大模块和宽带峰值检测模块组成。通过使用宽带LNA模块,该电路可以实现高灵敏度的检测。并采用宽带峰值检测模块,实现对宽带信号的同时检测。本文给出了这两个模块的详细设计。经过仿真和测试,证明两个模块均能达到既定目标,宽带信号检测电路可用于EMC测试中宽带电场传感器信号的检测。
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引用次数: 1
TAES: A PEEC-based tool for transient simulation TAES:一个基于peec的瞬态仿真工具
Pub Date : 2016-05-17 DOI: 10.1109/APEMC.2016.7522834
Hongcai Chen, Zilong Qin, Y. Du, Qinghai Wang, Yu Ding
This paper presents a Partial Element Equivalent Circuit (PEEC) based simulation tool, called TAES for simulating transients in a wire system. The enhancement in the traditional PEEC model with the vector fitting method is provided in order to achieve a time domain simulation for frequency-dependent conductors. A system with steel bars, cables and arrestors is studied and results of experimental verification are provided. Finally, a practical configuration of telecommunication tower is analyzed using proposed tool.
本文提出了一种基于部分元件等效电路(PEEC)的仿真工具,称为TAES,用于模拟导线系统中的暂态。利用矢量拟合方法对传统的PEEC模型进行了改进,实现了频率相关导体的时域仿真。对钢筋、电缆和避雷器组成的系统进行了研究,并给出了实验验证结果。最后,利用本文提出的工具,对一个实际的通信铁塔结构进行了分析。
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引用次数: 13
期刊
2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)
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