Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
This paper deals with the study of fractional slot permanent magnet synchronous machine, under 9 slots/10 poles structure, with outer rotor. It reports some results obtained by means of FEM-based simulation, which have as main goal the improvement of output characteristics. More specific, the inner diameter of the rotor and the stator shoe shape are modified. The analysis takes into consideration...
The paper presents a new solution of the stator winding of three-phase induction motor that brings an increase of the performance by modifying the air-gap flux density wave towards a more sinusoidal shape. The concept involves different number of turns in stator slots accompanied by a modification of the magnetic circuit. Both FEM-based analysis and experimental results put in view significant improvements.
This paper presents a study upon a new configuration of an outer rotor induction motor with multipole stator winding. The new design comes out as a result of a reconfiguration process of a real model by means of FEM-based analysis. The main transformation consists in replacement of the regular drum winding with a toroidal one, which allows a high flexibility in changing the number of pole pairs. The...
Currently the renewable energy presents an increasing interest and special attention is given to the small scale wind turbines, used to generate electricity for domestic needs. Their purpose is to produce electric energy at increasingly smaller speeds of the wind and with improved economically efficiency. This paper presents the design and study of the behavior for a direct drive permanent magnet...
The gearless PM generator system has high potential for the wind turbines because of its robustness, increased energy yield and reliability compared to electrically excited ones. The main disadvantage of PM synchronous generators is the high cost of PMs and the demagnetization risk at high temperature. In this paper is presented a comparative analysis in terms of permanent magnet type chosen for the...
This paper presents a dual approach concerning the influence of unbalanced supply voltage on the three-phase induction motor operation. On one hand, a FEM-based analysis examines the ill effects upon the magnetic field, as main concern, and a few electric and mechanical parameters. On the other hand, a study of the transitory regime (including no-load startup and sudden loading) is employed under...
The paper presents a study of an induction motor with ring stator windings. The main idea of this solution is to give a higher flexibility in obtaining of two or more number of pole pairs simultaneously with a better utilization of the machine. The developed torque in connection with the demanded input power is the major task of the analysis. The results are based on experimental tests and FEM simulation.
This paper presents the results and conclusions of a study upon the performance developed by a hybrid synchronous machine. Both generating and motoring duties are taken into consideration in order to establish the actual capabilities for one or the other regime. The aim is an evaluation upon the aptness of using this machine for specific applications and mainly in variable-speed electric drives within...
The paper presents a study concerning the influence of the excitation pole shape upon the output voltage of a hybrid synchronous generator. The analysis is based on FEM simulation and represents a step in the optimization process of an existent H.S.G.
This paper proposes a dual-rotor hybrid synchronous motor as a solution for starter-alternator applications on vehicles. The motor duty performance is only presented. The analysis includes both experimental tests and FEM-based simulations. The results put in view some important advantages that recommend this solution as a promising one.
We formulate the proper statistical mechanics to describe the stretching of a macromolecule under a force provided by the cantilever of an Atomic Force Microscope. In the limit of a soft cantilever, the generalized ensemble of the coupled molecule–cantilever system reduces to the Gibbs ensemble for an isolated molecule subject to a constant force in which the extension is fluctuating. For a stiff...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.