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1

Torque simulation in a reluctance motor design incorporating HTS materials in both stator and rotor parts

Bouchekhou Hocine, Mekideche Mohamed Rachid, Lévêque Jean

Przegląd Elektrotechniczny

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2019

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R. 95, nr 9

94--97

EN

In this work, a fully high temperature superconducting reluctance motor (HTS RM) is studied. A smallest configuration of HTS armature winding based on the mechanical characteristics of HTS BSCCO tape is determined. Furthermore, a novel rotor topology of single HTS YBCO bulk with ferromagnetic material is proposed. Electromagnetic torque of HTS RM is calculated by finite element method (FEM) with 2D consideration. The characteristics of the bipolar HTS RM are compared with a conventional motor with HTS rotor.

PL

Opisano silnik reluktancyjny z elementami wykonanymi z wysokotemperaturowego nadprzewodnika. Do uzwojenia wykorzystano taśmę HTS BSCCO. Zaproponowano też nową konstrukcję wirnika z materiału HTS YBCO. Obliczono moment elektromagnetyczny wykorzystując metodę elementów skończonych.

2

Global and distributed torque calculations using the CDSA approach

Li M., Lowther D.A.

Archives of Electrical Engineering

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2011

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Vol. 60, nr 4

459-471

EN

Accurate force and torque calculations are fundamental to being able to predict the operation of an electromechanical device or system. The Maxwell stress tensor and the virtual work principle are the two major theories for force and torque calculation. However, if local distributions of torque are needed to couple to structural and vibration analyses, the conventional Maxwell stress approach cannot provide this easily. A recently developed approach based on sensitivity analysis has the capability to deliver local stress and torque as well as accurate global results. In addition, this approach divides the total torque into different components which are essential to the design of electrical devices. This paper includes several numerical examples of torque calculations of different electrical machines. The results are verified by a commercial software package using the Maxwell stress based force calculation.

3

Model of the reciprocating engine using iterative procedures of the transient torque calculation

Kropiwnicki J.

Journal of KONES

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2010

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Vol. 17, No. 2

257-264

EN

Process of development of vehicles is nowadays preceded by extensive modelling tests, which allow evaluating influence of applicable design solutions on future utilitarian parameters of the vehicle. Here, estimation of vehicle's dynamics by measuring of acceleration time from 0 to 100 km/h can be an example. Similar, maximal speed, pollutants emission or fuel consumption under speciflc conditions of vehicle's operation can be the example. Modelling research allow to shorten time of introduction of new vehicle for production significantly. Most eager group of model used in simulation tests of vehicles, according to short time of calculation, is black box models. They do not take into consideration they cyclic type of operation, however, it is possible to identify fast and simple their coefficients. This work involves description of reciprocating engine tests, which have been done under transient and steady-state conditions. Transient conditions were forced by rapid change of engine control signal. During the tests differences of torque generated by engine under transient and steady-state conditions have been registered for the same control signal. Basing on the received results a new algorithm of transient torque calculation has been proposed. In the presented model value of the transient torque has been combined with the engine control signal and others engine parameters, which deser ibe transient history of the engine. Hence, iterative procedures of the transient torque calculation with declared time step have been implemented.

4

Torque calculations in electrical machine models. A sliding surface technique

Jagieła M.

Archives of Electrical Engineering

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2007

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Vol. 56, nr 2

115-126

EN

The paper deals with the electromagnetic torque computations in models of rotating electrical machines utilizing the Lagrange sliding surface technique for rotor movement representation. Various interpolating functions are tested to construct a coupling algorithm for moving and stationary regions. Two different formulas for torque calculation are used. The error in torque computations is assessed using two models of induction machines. The reference models are those of the same machines but applying the moving band technique. The best interpolation algorithm is found from the analysis and its accuracy is assessed by comparison with other algorithms. The analysis is carried out under assumption of uniformly distributed nodes at the sliding interface and is addressed to two-dimensional finite element models based on first order approximation.

PL

W pracy przedstawiono metodę obliczeń momentu elektromagnetycznego w modelach polowych maszyn elektrycznych, dostosowaną do metody odwzorowania ruchu obrotowego metodą powierzchni ślizgowej. Zastosowano różne funkcje interpolujące rozkład pola magnetycznego w szczelinie powietrznej a na ich podstawie skonstruowano algorytm sprzężenia siatki ruchomej z siatką nieruchomą. Zastosowano dwie różne metody obliczeń momentu oraz dwa modele maszyn indukcyjnych. Wynikiem analizy jest znalezienie metody interpolacji zapewniającej największą dokładność. Analizę wykonano dla modelu dwuwymiarowego, przy założeniu równomiernego rozmieszczenia węzłów na powierzchni ślizgowej oraz przy aproksymacji elementami pierwszego rzędu.