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Core loss resistance impact on sensorless speed control of an induction motor using hybrid adaptive sliding mode observer

Ayana Tadele, Wogi Lelissa, Morawiec Marcin

Archives of Electrical Engineering

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2023

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Vol. 72, nr 4

895--913

EN

Induction motors (IMs) experience power losses when a portion of the input power is converted to heat instead of driving the load. The combined effect of copper losses, core losses, and mechanical losses results in IM power losses. Unfortunately, the core losses in the motor, which have a considerable impact on its energy efficiency, are not taken into account by the generally employed dynamic model in the majority of the studies. Due to this, the motor rating often corresponds to the worst-case load in applications, but the motor frequently operates below rated conditions. A hybridized model reference adaptive system (MRAS) with sliding mode control (SMC) is used in this study for sensorless speed control of an induction motor with core loss, allowing the motor to operate under a variety of load conditions. As a result, the machine can run at maximum efficiency while carrying its rated load. By adjusting the 𝛼-axis current in the 𝛼 𝛽 reference frame in vector-controlled drives, the system’s performance is enhanced by running the motor at its optimum flux. Regarding the torque and speed of both induction motors with and without core loss, the Adaptive Observer Sliding Mode Control (AOSMC) has been constructed and simulated in this case. The AOSMC with core loss produced good performance when the proposed controller was tested.

2

Rdzeń bezszczotkowego silnika prądu stałego wykonany z amorficznego materiału miękkiego magnetycznego

Hreczka Marek, Burlikowski Wojciech, Hetmańczyk Janusz, Kolano-Burian Aleksandra, Kolano Roman

Przegląd Elektrotechniczny

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2022

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R. 98, nr 9

287--292

PL

W artykule porównano dwa prototypy bezszczotkowych silników prądu stałego (PM BLDC), których rdzenie wykonano z materiału amorficznego (ASMM) i blachy elektrotechnicznej (Fe-Si). Badania porównawcze wykonano korzystając z symulacji komputerowej w programie ANSYS i eksperymentu laboratoryjnego. Uzyskane wyniki potwierdzają, że silnik z rdzeniem amorficznym charakteryzuje się niższymi stratami i niższą temperatura obudowy silnika.

EN

This paper compares two prototypes of brushless dc motors (PM BLDC) with cores made of amorphous material (ASMM) and electrical sheet metal (Fe-Si). Comparative studies were performed using computer simulation in ANSYS and laboratory experiment. The results obtained confirm that the motor with an amorphous core has lower losses and a lower motor case temperature.

3

Core loss distribution measurement of electrical steel sheets using a thermographic camera

Shimoji H., Todaka T., Enokizono M.

Przegląd Elektrotechniczny

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2011

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R. 87, nr 9b

65-68

EN

The aim of this study is to measure the distribution of core loss in electrical steel sheets by using a thermographic camera. This paper describes the measurement system and method, along with their underlying principles. Measurement problems are investigated, and the measurement accuracy is determined. The iron loss distributions are presented, as measured under various conditions on vector magnetic measurement equipment.

PL

Zbadano rozkład strat magnetycznych przy wykorzystaniu kamery termograficznej. Przeanalizowano problem pomiarowe i niepewność pomiaru. Straty mierzono dla różnych warunków magnesowania z uwzględnieniem wartości wektorowych.

4

Measurement of core loss in single sheet tester

Tamaki T., Fujisaki K., Yabumoto M., Hamada N.

Przegląd Elektrotechniczny

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2007

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R. 83, nr 4

14-17

PL

Straty mierzone testerem SSTz pośrednim magnesowaniem (gdzie próbka jest magnesowana za pośrednictwem rdzenia z cewkami magnesującymi) nie zawsze korespondują ze stratami mierzonymi testerem o bezpośrednim magnesowaniu (gdzie próbka jest umieszczona wewnątrz cewek magnesujących). W obu typach testerów czujniki H i B mają szerokość porównywalna z wymiarami próbki. Straty mierzone testerem o magnesowaniu pośrednim wykorzystującym zbyt małe czujniki różnią się od strat mierzonych testerem o bezpośrednim magnesowaniu.

EN

The core loss measured with the indirect magnetizing single sheet tester (SST) (in which a sample is placed between yokes and is indirectly magnetized by the yokes magnetized by magnetizing coils) roughly corresponds with that measured with the direct magnetizing SST used as standard (in which a sample is placed inside a magnetizing coil and is directly magnetized by the magnetizing coil). Both the SSTs have the B coil and the H coil whose widths are the same as the sample width. However, the core loss measured with the indirect magnetizing SST using the small size of the B coil and the H coil is much different from that measured with the direct magnetizing SST.