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An approach towards a high speed current mode SAR ADC is presented. Even though SAR ADCs based on charge redistribution have been significantly improved in efficiency and operating frequency, they are still limited by the settling requirements of the switched capacitor DAC. To overcome this limitation, we propose the use of a current mode SAR ADC incorporating a current steering DAC operating at 2...
In this paper a novel multiple gain switched capacitor (SC) DC-DC converter circuit with eleven switches and two flying capacitors along with a filter capacitor is presented. This converter is capable of powering electronic devices at different voltages in the buck or boost mode. Since proposed SC topology is inductorless, these converters can achieve multiple gains either in buck or boost mode at...
At present, there are two typical electromotive drive train system (EDTS) configurations on the market. On the one hand, there are high voltage systems for conventional cars with system voltages in the range of 400 V – 800 V. In industrial truck and fork lifter applications, there are low voltage solutions with a system voltage of 80 V. A main question at this topic is: “Which system battery voltage...
Inverters for electric vehicle motor drive systems are essential in converting the battery's direct current into alternating current. Si(Silicon) IGBT that is commonly used in inverter modules have large Vce,sat and turn-off time due to p+ drain and tail current. Therefore, inverter modules consist of Si IGBT with relatively low efficiency. If we can use MOSFETs instead of IGBT in inverter modules,...
This paper repots an optimum on-time (OOC) control with predicting correction technique (PCT) for ripple-based buck converter. The switching frequency (FSW) variation is analyzed with completely considering the parasitic resistances of the components and devices. The proposed converter achieved nearly constant switching frequency over a wide load range without extra clock controlled circuits and current...
An adaptive controller is designed for three-phase pulse width modulation (PWM) voltage source rectifier with parametric uncertainties based on the dynamic surface control (DSC) technique. The unknown parameters of the system are estimated by applying the adaptive control method. In addition, the problem of “explosion of complexity” in backstepping design procedure is avoided by using the DSC technique...
In this paper, a simulation model of an electromagnetic rail launcher system based on PSpice software is applied, in consideration of multi-physics factors, such as current skin effect, contact pressure and contact resistance on the contact surface of the armature and the barrel, velocity skin effect, friction drag and temperature coefficient of resistivity. Analyses were made on the effects of various...
The aim of this paper is to study and report a designed method to evaluate the elements of advanced DC/DC converter. This ensures working in a continuous conduction mode and therefore improved system performance. Many developed DC/DC converters have been found in the literature. The elementary of positive output voltage-lift advanced DC/DC Luo converter is chosen as the main focus case study of this...
The complexity of electromagnetic simulation of high-speed interconnects drastically rises as frequency moves upwards. Although full wave simulation is with high precision and capable of electromagnetic simulation through dc to hundreds of gigahertz, for consideration of high efficiency the quasi-static-electromagnetic-field-based parameters extraction combined with the circuit simulation still remains...
This paper introduces concept of discrete control method of class E amplifier which keeps nominal operation for varying load resistance. In the proposed method, shunt capacitance and output resonant capacitance are varied electronically by setting status of switches which are connected to capacitances. Proposed method can keep nominal operation, i.e., ZVS and ZDS, both when load resistance is higher...
In this paper, an attempt has been made to predict the performance of grid connected induction generator (GCIG) due to different nature of grid faults. MATLAB/Simulink model for the power network as developed along with three phase induction machine model is used to observe the effects of faults on the transient performance of SCIG. Simulation result as obtained are found to be useful to predict the...
In order to fabricate high performance polymer solar cells, donor:acceptor mixture must be prepared using a proper solvent. Since solubility of C60, as a truly cost effective acceptor, is very limited in common solvents, finding a suitable solvent can enhance the Poly(3-hexylthiophene):C60 (P3HT:C60) based solar cell performance in terms of short circuit current (JSC), fill factor (FF) and consequently...
Having a model accurately describing the real transformer high frequency characteristics is necessary in online examination of the physical structure of a transformer for mechanical faults detection. Comparison between simulation results and experimental data should be used in model accuracy examination. In this paper high frequency characteristic of a power transformer is modeled using lumped parameter...
Distance relays are sensitive to the power swings. So these are blocked during power swing to ensure reliability of the power system. However, if a fault occurs during a power swing, distance relay must operate to clear the fault with a high degree of selectivity and sensitivity. This paper presents a new symmetrical fault detection techniques during power swing based on differential three-phase instantaneous...
In the literature, many cryptosystems are based on the Strong Diffie-Hellman (SDH) and related problems. If cryptosystems based on the SDH problem use general domain parameters, this leads to a significant security loss. However, domain parameters in standards (e.g., SEC 2, ANSI X9.62/63, IEEE 1363, NIST SP 800-56) are susceptible to Cheon's algorithm [10], [11]. In this paper, we propose an algorithmic...
This paper presents simulation results of bending the half-wave dipole antenna at different points of its length. Antenna under test is a center-fed dipole simulated at two different dimensions: half-wave length and resonant length. The bend angle is incremented by 5 degrees starting from 5 degrees to 90 degrees. The entire dipole is divided into 32 segments. There are 16 segments them from one end...
Within a growing variety of systems that exhibit memristive behavior nowadays, most of the research has so far focused on the properties of these single devices, whereas very little is known about their response when they are organized into networks. In this work we study the composite characteristics of memristive elements connected in regular one-dimensional configurations. Using a nonlinear memristor...
In the past few decades demand for Multi Terrain Robot applications have been increased significantly. These robots can be employed for the purpose of security surveillance and rescue purposes in the remote areas. In remote areas the terrain is not uniform and hence stability of the robot becomes a challenging task. In this paper, a new design is proposed for the mobile robot, which aims to perform...
This paper presents an analysis of variations in the output characteristics of the mono-crystalline silicon PV cell under different temperature and irradiance levels using LabVIEW as the simulation tool. The base of study is mathematical modeling of PV cell characteristics using the well-known one-diode equivalent model in LabVIEW. The designed tool computes and displays current-voltage (I-V) curves,...
As lithium-ion batteries play an important role for the electrification of mobility due to their high power and energy density, battery lifetime prediction is a fundamental aspect for successful market introduction. This work shows the development of a lifetime prediction model based on accelerated aging tests. To investigate the impact of different voltages and temperatures on capacity loss and resistance...
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