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In this paper, we focus on the study of the impact of voltage scaling on writing performance and energy of STT-MRAM arrays featuring four different configurations of bitcell. The memory arrays are implemented by a circular MTJ with a diameter of 30 nm and a 28-nm UTBB FDSOI CMOS technology. The analysis is performed by considering the effect of both CMOS and MTJ process variations, and the stochastic...
In this paper we show how the open standard modeling language Modelica can be effectively used to support model-based design and verification of cyber-physical systems stemming from complex power electronics systems. To this end we present a Modelica model for a Distributed Maximum Power Point Tracking system along with model validation results.
This paper presents a multifrequency spiral vector model for both steady-state and dynamic performance analysis of the brushless doubly-fed induction machine (BDFIM) with a nested-loop rotor. Winding function theory is first employed to give a full picture of the inductance characteristics analytically, revealing the underlying relationship between harmonic components of stator-rotor mutual inductances...
In this paper, process, device, and electromagnetic simulations are combined to produce a distributed nonlinear model for an LDMOS RF power transistor. The simulation challenges are handled by using multiple simulators, each with a suitable role in the modeling process. Semiconductor fabrication and device operation are performed through the process and device technology computer aided design (TCAD)...
The efficiency of a photovoltaic (PV) system depends on very intermittent environmental variables such as irradiance and temperature. Understanding of the behavior of PV systems in function of these variables depends on mathematical models for PV cells, modules and arrays. This becomes more complex when partial shading occurs. This paper presents three different MATLAB-based modeling strategies for...
A large-signal modeling approach has been developed for multi-finger devices fabricated in an Indium Phosphide (InP) Double Heterojunction Bipolar Transistor (DHBT) process. The approach utilizes unit-finger device models embedded in a multi-port parasitic network. The unit-finger model is based on an improved UCSD HBT model formulation avoiding an erroneous RciCbci transit-time contribution from...
This paper discusses an approach taken to extract a virtual X-parameter (vX-parameter) model for a 500W L-Band internally matched device (IMD). X-parameters are essentially an open form of nonlinear data format that can be directly extracted from an NVNA and can be used in a circuit simulator as non-linear models. However, for very high power devices, the NVNA and its required peripheral components...
The purpose of this paper is to model, analyze and evaluate the performance of a public transportation network characterized by choice phenomena, synchronization and concurrency using two complementary formalism Petri Nets (PN) and Dioid algebra. Our contribution through this paper is to propose a (max, +) modeling approach for this type of system with conflicts by developing some functions called...
Accurately modeling stationary battery storage behavior is crucial to pursuing cost-effective distributed energy resource opportunities. In this paper, a lithium-ion battery model was derived for building-integrated battery use cases. The proposed battery model aims to balance speed and accuracy when modeling battery behavior for real-time predictive control and optimization. To achieve these goals,...
This paper provides detailed and complete models of the large-scale transmission-connected PV plants which have considered the dynamics of maximum power point tracking (MPPT). These models are based on the WECC's generic PV system models whose circuit and control modes are modified to build our new PV models. In terms of the circuit, the detailed inner-loop current control model is adopted for the...
This work introduces and discusses the issues of several common startup techniques for boost dc-dc converters. Moreover, basic operating principle of boost converters and three kinds of startup techniques will be briefly introduced in this work, and then an improved method is presented. The mathematical models of two chosen startup methods are built, and MATLAB simulation is used for comparison. In...
The aim of this paper is to combine the Bond Graph energy-flow modeling and the VHDL-AMS signal-flow modeling language for the simulation and the prototyping of modern switch-mode power converters. The proposed approach was used to model a specific test case, consisting of a Buck converter with a mixed-signal PWM regulator. The causal structure of bond graph paradigm provides the basis for the convergence...
This work compares four SiC power MOSFET models for SPICE provided by main device manufacturers: STMicroelectronics, CREE and ROHM. Model complexity and structures are analysed. Model accuracy is assessed by comparing simulation results to static output characteristics given in the respective device datasheets.
PPV (Perturbation Projection Vector) modeling is an unifying theory for the characterization of the general oscillators. However, for the emerging memristor-based oscillators, the existing PPV abstraction method, which is based on the direct PSS/PXF simulation, encounters the convergence problem due to the hidden state. In this paper we propose a reliable PPV abstraction method based on the conversion...
In many practical applications of wireless power transfer (WPT) system, high power transmission efficiency is required and has been widely studied as an important issue. This paper presents and analyzes a Series-Parallel compensated WPT system with a Z-source inverter network inserted. To obtain higher efficiency, asymmetrical voltage-cancellation (AVC) control is applied and the ZVS operation is...
This paper presents a scalable MIM capacitor model that is applicable at RF and mm-wave frequencies. The model parameters are obtained from electromagnetic simulations and verified by measurements over a wide range of geometry parameters. A de-embedding method is described that is based on two through structures.
The applications of Li-ion batteries used in energy storage system (ESS) in building environment is drawing more and more public attention and it is predicted to hold the most share of battery market in the year of 2020. In this paper, an equivalent circuit battery model for the ESSs applications in building environment is proposed, and the parameters are extracted experimentally. A new methodology...
Despite the great development in modeling the I-V characteristics of the PV module, the outdoor conditions variations still the main difficulty to predict its performances. In this work, anew approach proposed to reconstruct the I-V characteristic of a PV module under variousreal conditions of irradiance and temperature. Based on the characterization tests data, carried out on four different PV modules...
In this paper, a set of formulas which are sensitive to the shift in threshold voltage (AVth) of PMOS transistor, load capacitance (CL), and input transition (ti) have been explored to calculate the propagation delay of CMOS inverter using curved surfaces fitting. Different from conventional of focusing on load capacitance and input transition, our proposed model pay more attention to the impact of...
Artificial neural networks (ANNs) have been exploited as an efficient tool in modeling of many electronic devices, among them RF MEMS devices. The design of RF MEMS devices requires determination of their electrical and mechanical characteristics according to the application requirements. ANNs have been proposed to be used for modeling RF MEMS devices and can be used further as an alternative and...
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