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The paper presents a form of the electrothermal model of the ferromagnetic core for SPICE and the way, in which parameters of the model are determined. The manner of determining magnetic, geometric and thermal parameters of this model is described. The correctness of the proposed model and the manner of determining the values of parameters are verified by comparing the calculated and measured characteristics...
Performance of photovoltaic systems greatly depends on climate conditions. Apart from values of solar radiation, its variations can also have an influence on energy yield from a PV-system. In less favourable climate conditions (e.g. in central Europe), highly varying radiation is very frequent and the electrical converters (i.e. inverters, DC-DC converters) should be able to follow the irradiance...
This paper deals with the monolithic integration of switching cells that are used in power electronics for the realization of static power converters. The aim of the monolithic integration of the power switching cells is to suppress wire bonding in order to improve electrical performance as well as reliability of power modules intended for medium power applications. Within this context, the single...
A laboratory setup for investigation of maximum power point trackers (MPPT) for photovoltaic (PV) modules is presented. It is composed of a PV module, an artificial light source and a universal maximum MPPT circuit. The PV module has been customised so that to enable investigation of partial shadowing effects and related countermeasures. Halogen lamps provide a constant irradiation and pulse operation...
Good diagnostic tools are the base of a proper diagnosis and as a result of good treatment. The examination of disorders of the spinal cord or peripheral nerves requires a simple tests. These tests are called Quantitative Sensory Tests. To perform these tests typically a not very accurate tools are used. This inconvenience was the basis for the development of new diagnostic tools to perform the QST...
This paper presents a SiC JFET model comprising static, dynamic and thermal features built from SPICE Analog Behavioral Modeling (ABM) controlled sources. The model is parameterized in such a way that data sheet information is enough to set it to work. The model complexity is not very high and allows for reasonably long simulation times to cope with the rather slow self heating process and still maintain...
In this paper a general method for characterizing tapered inductors with square, hexagonal or octagonal shape is presented. The method proposed allows the evaluation of the series inductance to integrate in any integrated inductor lumped element model, thus granting the overall characterization of the device and the evaluation of design parameters such as the quality factor or the resonance frequency...
In this article a safe and affordable system of medicaments dispensation is described. The system can be utilized in both hospital and home environments. The main purpose of the device is medicament dispensation accordingly to doctor prescriptions. As a first element of the system a safe medicament dispenser prototype was built. The device is designed to fulfill the needs of patients forced to take...
In this paper we present a measurement system for multichannel recordings of the electrophysiological activity of brain tissue in vivo. The system consists of: penetrating Microelectrode Array (MEA), three versions of a Conditioning Module each equipped with different Application Specific Integrated Circuits (ASIC's), Digitizer and PC Application for recorded data presentation and storage. The MEA...
The number of particles in the particle beam, commonly referred to as beam intensity, is a crucial parameter for safe and efficient operation of any particle accelerator. The Large Hadron Collider (LHC) is equipped with current transformers which measure the electric current of the beam used to derive the beam intensity. There are two types of current transformers installed in the LHC. The DC Current...
In this paper we present the project and realization of a two-wheel, easy-to-use, Segway - type mobile vehicle. Battery powered, two-wheeled vehicles are of great and growing interest all the time. Unfortunately, solutions found on the market are still very expensive. It was the motivation behind designing own solution of this type. Presented vehicle has been designed from ground up. It is controlled...
This paper introduces a novel sun-tracker with a unique position detector to gain the maximum power from solar energy. In comparison with other sun trackers, low cost, simplified hardware structure and exact controlling algorithm are advantages of this system. This sun tracker is sensor based tracker. With utilizing more sensors, the accuracy increases and power lost decreases. The power lost is due...
In our investigation we focus on the A* Algorithm, for solving path-finding problems, because it is fairly flexible and can be used in a wide range of contexts. The main problem of A* Algorithm is the finite computer memory. Using this method, the robot can decide how to move from end to end point in an efficient manner without colliding with previously mapped obstacles. When in need of finding a...
The paper presents application of Artificial Neural networks (ANN) in classification system of medical data set, which can be helpful in diagnosis procedures. As a neural network, the perceptron feed forward architecture has been applied. The proposed ANN architecture contains one hidden layer. The elaborated models of ANN, computer simulations and results presented in this paper, have been made by...
In this paper a new 4-D fuzzy connectedness approach to medical image segmentation is presented. The developed algorithm dedicated to the analysis of magnetic resonance studies, improves the segmentation results by introducing simultaneous analysis of different MR projections. It is applicable especially for those cases, in which the slice thickness or slice gap are relatively big, but different sequences...
FATE is a project funded by the European Union under the program CIP/ICT-PSP with the main objective of organizing a big pilot on the automatic falls detection in aging people living at home. Automatic detection of falls is done in indoors and outdoors conditions, and in both cases the detection generates an alarm sent to a call center. The detection system is designed around a sensor sub-system based...
This paper presents a low power high data rate telemetry system for biomedical applications, such as neural recording systems for freely moving animals or wireless capsular endoscopy. Presented system operates in 4 GHz frequency band. It makes use of OOK modulation and offers a very high data rate, well above 100 Mbits/s. Presented wideband transmitter was implemented in 180 nm CMOS process with an...
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