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Influence of the number of turns on the performance of permanent magnet synchronous motor

Qiu H., Zhang Y., Yang C., Yi R.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2020

Vol. 68, nr 3

429--436

The current passed by the stator coil of the permanent magnet synchronous motor (PMSM) provides rotating magnetic field, and the number of turns will directly affect the performance of PMSM. In order to analyze its influence on the PMSM performance, a 3 kW, 1500 r/min PMSM is taken as an example, and the 2D transient electromagnetic field model is established. The correctness of the model is verified by comparing the experimental data and calculated data. Firstly, the finite element method (FEM) is used to calculate the electromagnetic field of the PMSM. The performance parameters of the PMSM are obtained. On this basis, the influence of the number of turns on PMSM performance is quantitatively analyzed, including current, no-load back electromotive force (EMF), overload capacity and torque. In addition, the influence of the number of turns on eddy current loss is further studied, and its variation rule is obtained, and the variation mechanism of eddy current loss is revealed. Finally, the temperature field of the PMSM is analyzed by the coupling method of electromagnetic field and temperature field, and the temperature rise law of PMSM is obtained. The analysis of this paper provides reference and practical value for the optimization design of PMSM.

Nonlinear surrogate synthesis of the surface circular eddy current probes

Halchenko Volodymyr, Trembovetska Ruslana, Tychkov Volodymyr, Storchak Anatolii

Przegląd Elektrotechniczny

2019

R. 95, nr 9

76--82

The mathematical methods of non-linear surrogate parametric synthesis of surface circular non-axial eddy current probes are proposed. Examples of synthesis in the formulation of objective functions as a quadratic criterion are considered. The results of the obtained solution in the form of level lines of eddy currents density distribution and values of absolute synthesis error for different excitation structures are given. In the testing zone, the value of the reduced synthesis error is calculated.

Zaproponowano matematyczne metody nieliniowej zastępczej parametrycznej syntezy kołowych powierzchniowych nieosiowych sond prądów wirowych. Rozważane są przykłady syntezy w formułowaniu funkcji celu jako kryterium kwadratowego. Podano wyniki otrzymanego rozwiązania w postaci linii poziomych rozkładu gęstości prądów wirowych i wartości bezwzględnego błędu syntezy dla różnych struktur wzbudzenia. W strefie testowej obliczana jest wartość zmniejszonego błędu syntezy.