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Due to higher specific power density, longer life time and safer operation, super-capacitors (ultra-capacitors or electric double layer capacitors) are being considered in applications of electric vehicles (EVs). This study deals with design of light electric vehicles or even rail vehicle powered by full or partial pure super-capacitors (SCs). The simulation model of the electric vehicles powered...
In this paper is presented an algorithm for estimating the wind speed by solving the non-linear model of a wind turbine (WT) using the Newton Raphson iterative method. The wind speed estimations obtained are used for computing the WT generator speed that maximize the extraction of wind power. This optimum generator speed is used as reference for the speed controller of a permanent magnet synchronous...
As the memory density increases for the big-data processing, the sensing speed is degraded because of the increased parasitic capacitive load. Thus, the equalization (EQ) scheme that is capable of improving the sensing speed has now become essential. This paper examines the effectiveness of EQ scheme on the sensing speed of offset-canceling dual-stage sensing circuit (OCDS-SC) in terms of cells per...
Interest paid lately to brushless direct current motors made the researches regarding the optimum design and construction of these motors to be very present. The study carried out, by the simulations we presented, shows that these motors have high torque oscillations in a complete rotation. There are identified the slots which create high torques, respectively low torques, in a complete rotation,...
The problems of improving dynamic accuracy servosystem for arbitrarily changing the input action by means of ensuring partial invariance and astatic control are considered. It is shown that the increase a servosystem quality factor and simplified procedure of synthesis of corrective elements in parallel channels and high-speed positioning error compensation is possible due to the prior formation of...
Due to the advantages of high speed, punctuality and environment protection, subway has received more and more attentions recently. As a high-power and multi- machine electrical propulsion system, the experiments in a real subway train are difficult and expensive. Therefore, the simulations become important before actual implementations. A subway line with permanent-magnet synchronous machines (PMSMs)...
In this paper the authors present an analysis of the command with rectangular (trapezoidal) printed currents of a permanent magnet synchronous motor (PMSM) for driving a bicycle. Constructive details and materials are presented. It also presents the results obtained from numerical simulations of the studied permanent magnet synchronous machine for its operating as a generator. In this operating regime,...
Omni-directional wheeled motion system with its flexible steering, stable structure and reliable control precision, become the basis of the mobile robot system which used indoor. In this paper two kinds of Omni-directions platform which wheeled by three Mecanum wheels are built up, by setting up the dynamical simulations about the two model based in simulation software, and according to the dynamic...
The aim of this paper is to analyze a kind of modularization transverse flux motor (MTFM) and compare it with ordinary motors. The basic principle and control method of this motor have been discussed in this paper. And the simulation results of the motor's basic unit have been presented and analyzed, the benefits of the modularization structure also been concluded. The requirements of the motor used...
The Airborne Gravimeter is a precision instrument for measure of the earth's gravity, in order to make the gravimeter isolate all kinds of disturbances in flight, and always keep an upright and stable state. In this paper, a high accuracy Airborne Gravimeter inertial stable platform was designed for this purpose. Also in order to shorten the design cycle of stable platform and ensure the performance...
A novel torque sharing function (TSF) to minimize the torque ripple of switched reluctance motor is proposed in this paper. Optimization criteria of a TSF that is concerned with an optimization problem including minimize copper loss and the maximum absolute value of the rate-of-change of the flux linkage (RCFL). In addition, a novel family of TSFs is proposed. An optimal TSF can be easily obtained...
The main objective of this paper is to apply a MPPT strategy (Maximum Power Point Tracking) to a wind energy system based on a doubly fed induction generator (DFIG) in order to maximize the converted power and provide better integration into the electrical grid. First, a mathematical model of wind power system is performed. Then, two control strategies of the system were studied and implemented. The...
The dual-stator permanent magnet synchronous motor (DSPMSM) features high efficiency and high torque and power density, but its special structure makes it difficult to design and there is no ready-made design software like traditional motors. In this paper, a DSPMSM control system for electric vehicles (EV) is designed, and achieves the field-circuit time-stepping finite element simulation using software...
With the aim of improving the shift quality of Hydro-Mechanical Continuously Variable Transmission (HMCVT) of tracked vehicle in turning conditions, with the research object of HMCVT of tracked vehicle, after analysis of the transmission structure and its working principle, and combining the working characteristics of the tracked vehicle in agriculture, the simulation model of the shift process of...
The most critical part of the induction machines which determines on their life time operation are rolling element bearings. To ensure reliable drive with an induction machine requires deep insight in electro-mechanical dynamics during its operation. The flexible multibody modeling technique enables the simulation of dynamic loads on all drive components. This paper focuses on complex dynamic modeling...
PMSM machines with concentrated windings have become more and more popular over the last years. The biggest drawbacks of these machines are high cogging torque and the form of the back EMF. Standard approaches try to shape the back EMF sinusoidal to use standard field orientated control. In the following paper an approach is shown to shape the EMF by using derivative free minimization. Using this...
An integrated mathematical model for the simulation of an offshore wind system performance is presented in this paper. The mathematical model considers an offshore variable-speed turbine in deep water equipped with a permanent magnet synchronous generator using multiple point full-power clamped three-level converter, converting the energy of a variable frequency source in injected energy into the...
This paper deals with the DC motor position control using second order sliding mode technique in aim to position a solar tracker front of the sun throughout the day. A short description of the studied system is introduced and the modeling of the DC motor using electrical and mechanical equations is shown. Thereafter, a comparative study using PI controller and second order sliding mode is presented...
Electrical propulsion is gaining popularity in the marine industry, because of its good energy management and better dynamic performance. An azimuth thruster driven by an electric motor is a common configuration found in modern electric propulsion systems. In recent years failures relating to bevel gears and bearings in azimuth thruster drive train failures were reported in the marine industry. The...
Simulating inertial system was applied to the test of the starting and braking performance of rotary mechanism. The accuracy of inertia has an important impact on test precision of simulating inertial system. So the distribution of the inertia error caused by the mass error and the centroid error is analyzed and the models of the simulating inertial system with the theoretical inertia and the limit...
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