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In electrical engineering education, modelling and dynamic simulation represent tools in order to understand the behaviour of the different components of electric drive- systems in transitory regimes. In this paper the direct, three steps rheostat, six pulses and PWM inverter starting of induction motor are simulated. The permanent magnet synchronous motor is modeled and starting also with PWM inverter...
The last fifty years were marked by an impressive evolution of ICT and the convergence theory was not in focus for a long time in this field. The present paper treats the convergence theory in the context of communication systems and tries to forecast the next steps in this area of interest. The paper analyzes the current market status, the business and technological convergence that marked the last...
Today many industrial facilities have a lot of industrial control software systems used in various ways. These systems work in all kinds of architectures, starting from the simple "one application on one computer attached to a process" to more complex systems such as client-server- database, multi-tier applications, etc. Being provided by different vendors, there is a problem of managing...
In order to establish reliable data transmissions in wireless networks inside buildings and outside, all the factors that influence the signal propagation must be considered. The evaluation of the link quality is possible with the received signal strength indicator (RSSI) and the link quality indicator (LQI). The link quality measurements were performed in different scenarios between two ZigBee devices...
Partially runtime reconfiguration is an efficient method for use in the limited resources in order to increase the performance of the system. In these systems, all the processes use the reconfigurable resources and place their hardware tasks at run time without affecting each other. One of the challenging problems in online task placement is fragmentation of reconfigurable resources. This paper focuses...
The RBF radial basis function network is intended especially for hardware implementation and this type of network is used successfully in the areas of robotics and control, where the real time capabilities of the network are of particular importance. The implementation of neural networks on FPGA has several benefits, with emphasis on parallelism and the real time capabilities. This paper discusses...
In this paper, a new method for decreasing the power consumption in LUT based FPGA circuits is presented that attempts to reduce the switching activity among LUT blocks. To achieve this, we have introduced the fake register insertion method and combined it with retiming method. Fake registers have been inserted on low-transition wires around high-transition wires to force the synthesis tool to direct...
The paper describes a high-performance rcconfigurable computing solution for real-time peptide mass fingerprinting. The FPGA system can process the raw mass spectrum generated by a MALDI-ToF mass spectrometer and perform a search against the entire MSDB database in 240 ms. This represents an almost 2000 fold speed up compared with an equivalent software implementation in C, running on a single 3 GHz...
This paper presents a practical control method for parallel operation of voltage source inverter modules with equal load sharing of the inter-connected modules. The main focus of the paper centers on control methodology for achieving precise phase synchronization for equal load sharing with minimum current circulation between the paralleled power converter modules, robust dynamics system control under...
This paper is focused on control solutions for a single-phase inverter for distributed generation (DG) systems requiring power quality features as harmonic and reactive power compensation for grid-connected operation. Based on these characteristics, a new current reference generator based on sinusoidal signal integrator (SSI) and instantaneous reactive power (IRP) is proposed. Simulation and experimental...
This paper is focused on control solutions for a single-phase power conditioner having a fuel cell as primary energy source in a Distributed Generation (DG) system. As the fuel-cell generators are usually connected to the grid through power electronic converters, the ripple of the converter input current has become an important issue to be evaluated. In fact, methods to eliminate the low-frequency...
Daylighting has become a more important feature of recent constructions due to the sustainable design movement, and suitable lighting controls provide building operators with the means to manage the way lighting energy is used in buildings more efficiently. Unfortunately, classic control systems, based on continuous dimming present some difficulties to adjust their performances to the rapid changes...
In the last decade, the effect of Internet usage in education is gradually increased. When we look from academic perspective, the new technologies provided alternatives for students learning. As distance education becomes important everyday, the indispensable elements of teaching and education, laboratories must be reachable via remote connection. Consequently, the education that is going to be given...
In this study, we consider evaluation of the first year undergraduate curriculums of electrical-electronics engineering departments at the state universities in Turkey (TR). The first year education is very significant, in view of the student's vocational information. Therefore, the first year curriculums are explained at thirty state universities. Analyzing the curriculums, the situation of electrical-electronics...
In the paper the dynamical performance and sensitivity to the motor parameter changes of the sensorless induction motor drive with MRAS type speed and flux estimator is demonstrated. The stability analysis of the stator current-based MRASCC estimator of the induction motor is presented. The influence of equivalent circuit parameter changes of the induction motor as well as coefficients of the adaptation...
In this paper the control problem of nonlinear/ uncertain dynamic systems via a variable structure systems (VSS) approach is discussed. Observation of the states of such systems is also considered. The extension to an observer-controller design is illustrated using a computer simulation of a thetas-r manipulator position control.
A computational investigation was carried out in a contactless electromagnetic induction flowmeter to measure the velocity of molten aluminum flowing though a ceramic duct. This paper includes the simulation and the experimental validation using as a reference the electromagnetic induction flowmeter and the experimental test. The results make it possible to demonstrate the reliability of the simulation...
In this paper we present the model based design optimization on a micromechanical system which is described by a VHDL-AMS behaviour model, based on the Cosserat theory. The application is a gyroscope test structure developed by STMicroelectronics. The schematic of the microactuator is built up from component models developed in Lancaster within previous work. The equations of motion of the beam model...
This paper describes a detailed analysis, verified by practical experimental results, of a synchronous reluctance machine with two similar stator windings and capacitance injection using a static switch. The steady state equivalent circuit is developed and used to investigate leading capacitance injection into the machine via a balanced three phase auxiliary winding that is only magnetically coupled...
The stabilization of free magnetic levitation in static fields is obtained by placing diamagnetic materials in the proximity of the floating magnet. Due to their intrinsic attributes, they act as a very small servo system, stabilizing the suspension. This paper evaluates the influence of the diamagnetic plate thickness on the vertical levitation, unlike the common method that considers an infinite...
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