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The misalignment of the transmitting and receiving coils in a wireless inductive link can degrade the link efficiency and limit the amount of power transfer. A coil structure, which is composed of two orthogonally-placed windings for the receiver, will be presented. Such structure lessens the variation of the coupling between the transmitting and receiving coils under coil misalignment. A canonical...
We present an innovative and comprehensive approach to model the resistance of local interconnect used in finFET technologies. Our parasitic resistance formulas for finFET source/drain regions cover both merged and unmerged fin processes. They have been verified with field solver simulation results, and are found to be accurate over a wide range of parameter values. Our local interconnect resistance...
This paper demonstrates the design of analog amplifiers using alpha-power MOS model. Any MOS amplifier design begins with estimation of device parameters (NMOS/PMOS) like alpha($\alpha), V_T$ and device transconductance ($k^\prime$) and they are typically estimated from simple device plots using simulator. The approach proposed here assumes measured at of \SI{1}{\micro\ampere} from...
Quadrature oscillator based on the operational transresistance amplifier (OTRA) is presented in this paper. The proposed quadrature oscillator circuit uses two OTRAs as main active building blocks and a few external passive components to generate the oscillations. The circuit provides independent control over the condition of oscillation and frequency of oscillation. A prototype circuit is implemented...
The paper derives mathematical conditions for the occurrence of touching points on the hysteresis loop of an ideal voltage-controlled memristor driven by the sinusoidal voltage.
The most basic type of circuit simulation consists of solving the nonlinear state equations of a circuit as a function of time, starting at given initial conditions. But both chaotic and stiff circuits present solutions that involve numerical errors inevitably amplified during simulation. For this reason, in particular for circuits of moderate order with nonlinear characteristics approximated with...
The voltage-behind-reactance (VBR) model is used more and more in modeling and simulation of electrical machines due to its improved efficiency and flexibility. So far, the VBR model has been applied to represent the standard three-phase synchronous/induction machines only. It is necessary to extend the VBR model to include multiphase machines that are commonly used in aircraft, ships, and other applications...
Electric transportation is the development tendency of the transportation systems in future world. Energy storage systems are the key components of the electric transportation systems. Accuracy state of charge (SOC) estimation of energy storage system is crucial not only for improve energy used efficiency, but also for electric transportation drive safety. This paper choose LiFePO4 Li-ion battery...
Dual active bridge dc/dc converter with high frequency isolation is gaining more attentions due to its small size and high-power density. In this paper, the principle of series resonant dual active bridge(SRC-DAB) DC-DC converter is discussed based on the fundamental analysis. The control method and principle of soft switching are also presented. Finally, the analysis is verified by computer simulation...
in the rest, two equivalent circuit models, the first-order resistance-capacitance (RC) model and the second-order RC model, were investigated for a lithium-ion battery. The Gauss-Newton (G-N) least square was applied to identify the two model parameters because of its nonlinear estimation and iteration. The lithium-ion battery rested respectively at three SOC points as 20%, 50%, and 80%. Results...
This paper proposes a high performance control method with Multi-CPU synchronous, time-delay and feedforward compensation for High-Speed Maglev. The proposed control strategies are verified on Real-Time simulation platform with Hardware-In-Loop. The experimental results demonstrate that by using the proposed methods the high-speed maglev can be operated in a whole speed range from 0 to 500km/h.
A new method for modeling switched-linear systems is presented: switching devices are modeled ideally using parametrized curves, and an efficient implementation for real-time simulation is proposed. Experiments on a rectifier topology for traction converters demonstrate the methods performance in terms of accuracy, stability and execution time, with a 50us step-size.
A novel method of doing co-ordinate transformation for LC/van der pol(vdp) oscillator is proposed. It allows vdp to be solved as a conservative system by applying Hamiltonian formulation using calculus of variation. The procedure is developed to calculate the constant of integration, a generalized concept of energy. Such constant of integration, which is different from energy, has implication on the...
In literature three phase voltage source inverter models are based on one specific application considering only a limited number of switching state combinations and assuming certain load properties. This paper suggests a model considering all practical switching state combinations. Time dependent load behavior is also included in the model.
Because of low switching losses and wide operation range, series-parallel resonant converter with optimized modulation is attractive. There are three major modeling methods for resonant converters, including approximation method, extended describing function method, and sampled-data method. Approximation method and extended describing function method are simple but relatively inaccurate on heavy load...
With the increasing density of transistors in advanced technology nodes, the radiation is an ongoing problem affecting the contents of memory cells. This paper presents the simulation results of radiation immunity for two different memory cell technologies: 32nm Bulk CMOS and 28nm FDSOI. The effect of Single-Event Upset (SEU) caused by the heavy ion impact with different Linear Energy Transfer characteristic...
For better viral marketing, there has been a lot of research on social influence maximization. However, the problem that who is influenced and how diverse the influenced population is, which is important in real-world marketing, has largely been neglected. To that end, in this paper, we propose to consider the magnitude of influence and the diversity of the influenced crowd simultaneously. Specifically,...
This paper proposes a methodology for modeling microwave devices based on Genetic Algorithms (GA). This technique allows electromagnetic parameters be related to the physical dimensions of device, making it easier to perform adjustment to obtain a certain response. To demonstrate the validity, the method was applied in double-H resonator bandpass filter and results were then compared with those offered...
There is an urgent need to develop accurate memristor circuit models for use in future large designs. Several Verilog-A and SPICE models have been presented which vary in their accuracy and simulation speed. This paper corrects a previous Verilog-A model and enhances the accuracy of another one. The results show that our proposal is stable over long simulation time, correctly predicts the behavior...
This paper presents and evaluates a new approach of energy estimation for single software components based on program flowcharts. This estimation is designed to be applicable early in the design process, which enables system designer to evaluate different design variants with respect to the energy consumption of the later system. The energy estimation model is based on individual flowchart elements...
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