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Purpose of weighting along with the defined weighting function for the new RMS-Average detector is introduced. Extensive comparison measurements on multimedia equipment in the scope of CISPR 32 were performed using the required Quasi-Peak and Average detectors and the RMS-Average detector for both conducted and radiated emission measurements to confirm the weighting function and for the definition...
The paper introduces an on-road charging system for several electrical vehicles (EV) at the same time based on magnetic resonant coupled wireless power transfer (WPT). To analyze the proposed system, an equivalent circuit model of the system with single longer transmitting coil and several shorter receiving coils is presented. System efficiency is of particular interest and is found to be determined...
Power quality and electromagnetic interference (EMI) control are mandatory for any grid-connected power converter. This paper describes a procedure for LCL filter design in a grid-connected high power density converter (HPDC) with the objective to meet both power quality and EMI requirements. The performance of the LCL filter is simulated and then validated experimentally.
Power system harmonic distortion is mainly caused by non-linear loads and power electronics used in the electrical power system and distributed renewable energy systems and Microgrids. The presence of non-linear loads and the increasing number of distributed renewable energy systems in electrical grids contribute to changing the characteristics of voltage and current waveforms in power systems. Such...
A novel dual band antenna with two U-shaped slots is presented. Using two U-shaped slots, the dual band characteristics are obtained. Utilizing a CPW feeding line, the overall dimension of the antenna is 34.5mm× 40mm, which printed on an FR4 substrate with a dielectric constant of 2.95 and a substrate thickness of 0.8 mm. Simulation and measurement results show that the antenna impedance bandwidth...
The propagation effect of lightning-produced electromagnetic pulse over a large mountainous region in southern-west China has been investigated. The regional geometry data are adopted from a global digital elevation model named GTOPO30 with a horizontal resolution of 30 arc seconds and vertical accuracy of about 30 m. FDTD (Finite-difference time-domain method) is used to calculate the electromagnetic...
A time-domain E-field probe is proposed in this study. It detects E-fields in single polarization between 0.6 to 2.6 GHz. For the sake of RF transparency, optical fiber is used to replace coaxial cable to transmit the signal from the transmitter to receiver. Thus, RF-over-Fiber (RoF) technology is applied for signal transmission. VCSEL and photodiode (PD) act as the transmitter and receiver respectively...
In recent years, there has been a shift in the process of performing electromagnetic interference (EMI) and electromagnetic compatibility (EMC) testing from a manual approach to a software-driven, automated approach. Generally speaking, this automation has provided numerous benefits to both those responsible for performing testing, as well as for those whose product is under test. This paper will...
Recent trends in the scaling down of the conventional transistor size and three-dimensional stacked integrated circuit have increased the importance of transient thermal-awareness in IC floor planning. To this end, this paper will compare the performance of two transient thermal analysis simulation methods: the latency insertion method (LIM) and the Gauss-Seidel (GS) method. By simulating an example...
This paper proposes a new complex resonant topology of wireless power transfer system, which still get better transmission performance in far distance. First, the circuit structure is theoretical analyzed based on LCL type complex resonant topology in the receiver, the reflective impedance, the load power and transmission efficiency and other expressions are deduced. The simulation model is constructed...
In this paper, an improved model of the vertical risers of a transmission line is proposed and validated. The proposed improved model, which can be readily implemented in the frame of a classical transmission line formulation, provides accurate results at frequencies much higher than the upper frequency limit of the classical transmission line theory. For example, for the assessed line (with a height...
In the common energy supply network the energy is transferred from the high voltage level to the medium voltage grid and further via the low voltage grid to the end customer. This general principle of the power distribution grid and its planning is currently changed especially by means of the increasing number of peripheral producers on the low voltage network. Furthermore, the grid's rising complexity...
Predicting high frequency behavior of systems with equivalent circuit simulations that are including component self-parasitic effects are not sufficiently accurate anymore. Mutual coupling, which is highly dependent on component/traces placement and orientation, has to be included in circuit models. Predicting the impact can be performed using 3D electromagnetic field simulations, but these are complex...
The electromagnetic waves emitted from devices can be a source of information leakage and can cause electromagnetic compatibility (EMC) problems. Electromagnetic radiation signal from computer display can be seen as a computer security risk if the radiation signal is intercepted and reconstructed. In addition to the image information displayed by the computer, electromagnetic radiation leaks the hardware...
In this study, the complex permittivity of certain types of liquid were measured using the large-bore-type open-ended circular waveguide reflection method with an N connector. The effectiveness of the proposed approach for measuring a liquid with high permittivity and high loss was also confirmed by comparing the measurement results with those obtained using the SMA connector-type open-ended cut-off...
In this paper, we proposes a method to obtain the stored in the air-gapped computer with the help of nearby smartphones by intentionally generating loud physical emanations. We can construct a big transmission network connecting a computer and many cell phones by using different kinds of physical emanations. We further demonstrate the scenario by implementing a system using electromagnetic waves and...
Magnetic components are generally used in electrical devices. However the behavior in terms of radiation and coupling to the environment of these components is not widely explored. This study presents a comparative analysis of the magnetic field distribution of a symmetrical and an asymmetrical toroidal core. A simple analytical model based on finite element analysis is developed. The effects of the...
In this paper, the principle of a Contactless Power Transfer (CPT) system is introduced, the situation of CPT system for electric vehicle about excessive startup current, coil short, system overheating and load open circuit are analyzed and research. According to the actual operating conditions of CPT system may exist fault, ready to power on protection strategy, the short circuit protection strategy,...
This paper presents a time domain model to calculate the transient current of the building lightning protection system (LPS) based on the Full Spectrum Convolution macro-modeling (FSCM) Partial Element Equivalent Circuit (PEEC) method combined with the modified image method (MIM). MIM-FSCM-PEEC model can fully consider the retardation effect of the coupling among the conductors, so that it has a high...
This paper analyzes the series-series (SS), series-parallel (SP) and four typical hybrid-series-parallel topologies (S-LCL, LCL-S, LCL-P and LCL-LCL) in resonant wireless power transfer. Functions of their primary and secondary resonances are explored and comparisons are made between their load characteristics as well as open-circuit and short-circuit performances. This work is helpful for the selection...
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