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Analysis of low saliency ratio and torque characteristics of the fractional slot concentrated winding Surface mounted motors

Qiu Hongbo, Wang Dong, Yang Cunxiang, Wang Kun

Archives of Electrical Engineering

2024

Vol. 73, nr 1

165--182

In recent years, fractional slot concentrated winding permanent magnet synchronous motors (FSCW PMSMs) have become a hotspot in the research field. Due to the unique inductance characteristics of the FSCW PMSM, a fast and accurate calculation of the d/q-axis inductance and saliency ratio is necessary. In this paper, a method is proposed to calculate the d/q-axis reactance of the FSCW SPMSM, which constructs the equivalent magnetic circuit model of the d/q-axis armature reaction flux separately, and the saliency ratio characteristics of the FSCW SPMSM were demonstrated. In addition, to meet the high requirements of the modern industries, especially in servo systems, accurate consideration of the effect of stator resistance on torque and electromagnetic performance is important and more applicable. According to the relationship between the vector parameter, the explicit expression of the d/q-axis currents that consider the stator resistance is obtained, and the prediction of load angle at maximum electromagnetic torque is achieved. Then, combined with the finite element method, the influence mechanism of stator resistance on the motor steady-state performance is revealed. Finally, the experimental data are compared with the calculation data, and the correctness of the models and analysis was verified.

Indukcyjności w układach elektroenergetycznych

Rajchert R., Kuczałek B.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2004

z. 102

53-64

W pracy przedstawiono zasadę obliczania indukcyjności pewnych wybranych układów spotykanych w elektroenergetyce. Podano indukcyjności niektórych kabli energetycznych w zależności od sposobu ich ułożenia. Zwrócono szczególną uwagę na zmianę reaktancji rozproszenia uzwojeń wtórnych przekładników prądowych przy zmianie wartości prądu pierwotnego oraz obciążenia strony wtórnej.

In the article it was shown inductance calculation method of chosen circuits in electrical power engineering. There are given inductance values of some power cables in reference to each other position. It was paid special attention on the change in leakage reactance of the current transformer secondary winding referred to changing values of primary current and load on secondary side.