Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 4

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The controlled drive of pumps and fans A 12-phase cage induction motor

100%

Drozdowski P.

tom z. 111

209-218

In this paper the theory and performance characteristics of the twelve-phase cage induction motor are shown. These characteristics are given for five sequences of supplying voltages. For each sequence the motor has other no load rotating speed. So, the speed control is caused by appropriate choice ofthis sequence and arrives m a stepper way. For the motor supply a special transformer is proposed fed by the three-phase mains. The motor can drive different devices and particularly fans and pumps changing their delivery in a stepper way.

Modelling of BLDCM with a double 3-phase stator winding and back EMF harmonics

100%

Drozdowski P.

tom Vol. 64, nr 1

53--66

In this paper the mathematical model of the brushless DC motor (BLDCM) with a double 3-phase stator winding is analysed. Both the 3-phase windings are mutually displaced by 30 electrical degree. Special care has been sacrificed to influence of higher harmonics of induced electromotive forces (EMF) on electromagnetic torque and zero sequence voltages that may be used for sensorless control. The mathematical model has been presented in natural variables and, after transformation to symmetrical components, in a vector form. This allows, from one side, for formulating the equivalent circuit suitable for circuit oriented simulators (e.g.: Spice, SimPowerSystems of Simulink) and, from the other point of view, for analysis of higher harmonics influence on control possibilities. These considerations have been illustrated with some results of four quadrant operation obtainded due to simulation at automatic control.

Modelling of BLDCM with asymmetrical double stator winding and back EMF harmonice

100%

Drozdowski P.

tom Nr 4(104)

111--116

In this paper the mathematical model of the brushless DC motor (BLDCM) with a double 3-phase stator winding is analysed. Both the 3-phase windings are mutually displaced by 30 electrical degree. Special care has been sacrificed to influence of higher harmonics of induced electromotive forces (EMF) on electromagnetic torque and zero sequence voltages that may be used for sensorless control. The mathematical model has been presented in natural variables and, after transformation to symmetrical components, in a vector form. This allows, from one side, for formulating the equivalent circuit suitable for circuit oriented Simulator (e.g.: Spice, SimPowerSystems of Simulink) and, from the other point of view, for analysis of higher harmonics influence on control possibilities. These considerations have been illustrated with some results of four quadrant operation obtainded due to simulation.

Mathematical model of the six electrode pulse current electric arc furnaces

51%

Hudym V. I. , Drozdowski P. , Postoliuk A. , Mamcarz D.

2016

tom Y. 113, iss. 3-E

151--161

In the article based on the fundamental laws of physics and mathematics has been formulated mathematical model to analyze the electromagnetic waveforms in electrical power systems with non-linear loads, such as arc furnaces.

W artykule na podstawie fundamentalnych praw fizyki i matematyki został sformułowany model matematyczny do analizy przebiegów elektromagnetycznych w układach zasilania energią elektryczną odbiorów nieliniowych, np. pieców łukowych.