Definiranje kritičnih podataka pola rotora LSPMSM-a s obzirom na faktor snage i učinkovitosti uporabomTaguchijeve metode USING TAGUCHI METHOD IN DEFINING CRITICAL ROTOR POLE DATA OF LSPMSM CONSIDERING THE POWER FACTOR AND EFFICIENCY Uğur Demir, Mustafa Caner AkünerOriginal scientific paper This paper presents determining of critical rotor pole data of line-start permanent magnet synchronous motor (LSPMSM). The critical rotor pole data of LSPMSM considering the power factor and efficiency are investigated by using Taguchi's method. This determining process is carried out to prevent waste of time while 3D analysis is made. Two-dimensional (2D) dynamic finite element analysis (FEA) models are deployed to evaluate the performances of LSPMSM. To avoid the task of creating the geometry of the motor in Maxwell 3D, RMxprt has initially been used here to provide a convenient way of expediting. This study has performed 2 different ways for optimization. They were optimization using Taguchi's method and without using Taguchi's method. The method without using Taguchi method is known as a conventional method. The experimental comparisons between these ways have demonstrated that remarkable decrease in time-loss in the power factor and efficiency can be obtained by the proposed method. Keywords: design of experiment; finite element analysis; line-start permanent magnet motor; optimization; power factor and efficiency; Taguchi Definiranje kritičnih podataka pola rotora LSPMSM-a s obzirom na faktor snage i učinkovitosti uporabomTaguchijeve metodeIzvorni zanstveni članak U radu se prikazuje određivanje kritičnih podataka pola rotora sinhronog motora s permanentnim magnetom (LSPMSM). Kritični podaci pola rotora LSPMSM-a s obzirom na faktor snage i učinkovitosti istražuju se pomoću Taguchi metode. Ovaj se proces određivanja provodi kako bi se spriječilo gubljenje vremena dok se radi 3D analiza. Za procjenu rada LSPMSM razvijeni su dvodimenzijski (2D) dinamički modeli analize konačnih elemenata (FEA). Da bi se izbjegao zadatak stvaranja geometrije motora u Maxwell 3D, koristio se RMxprt kako bi se osigurao prikladan način otpremanja. U radu su provedena 2 različita načina za optimizaciju. To su optimizacija primjenom Taguchi metode i bez nje. Ona bez uporabe Taguchi metode je poznata kao konvencionalna metoda. Eksperimentalne usporedbe ovih načina su pokazale da se predloženim postupkom može postići značajno smanjenje gubitka vremena kod faktora snage i učinkovitosti.Ključne riječi: faktor snage i učinkovitosti; metoda konačnih elemenata; optimizacija; plan eksperimenta; sinhroni motor s permanentnim magnetom; Taguchi
In this study, the axial flux permanent magnet motor and the length range of the air gap between rotors was analyzed and the appropriate length obtained. NdFeB permanent magnets were used in this study. Permanent magnets can change the characteristics of the motor's torque. However, the distance between permanent magnets and the air gap will remain constant for each magnet. The impact of different magnet angles for the axial flux permanent magnet motor and other motor parameters was examined. To this aim, the different angles and torque values of the magnetic flux density were calculated using the finite element method of analysis with the help of Maxwell 3D software. Maximum torque was obtained with magnet angles of 21°, 26°, 31.4°, and 34.4°. Additionally, an important parameter for the axial flux permanent magnet motor in terms of the air gap flux was analyzed. Minimum flux change was obtained with a magnet angle of 26°. The magnetic flux of the magnet-to-air-gap is under 0.5 tesla. Given the height of the coil, the magnet-to-air-gap distance most suitable for the axial flux permanent magnet motor was 4 mm. Ill. 11, bibl. 4, tabl. 2 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.110.4.280
This research has been done on how the teachers will use technology in teaching-learning processes. Teachers' use of educational technologies in teaching-learning processes has caused alteration in teaching qualification and teacher role. Technology has enabled students to learn in more different dimensions by removing time-place limitations in teaching and learning. Teachers have not only been the source of information as in traditional education methods, but also advisors, counselors and pathfinders who guide students to information and redirect them at reaching information. Using technology in education can be possible via its integration to teachinglearning processes, so teachers use technology in arranging teaching-learning processes. Utilized technology is selected harmoniously for education purposes and environments. Technology must be such as to supply teaching-learning process, not a basis model, and must be eligible to be integrated into teaching-learning processes. Index Terms-Education technology, teaching process, technology learning, teacher training, use of technology.
Original scientific paper This paper presents a novel approach in design of toroidal axial flux permanent magnet open-slotted NN type (TAFPMOS-NN) motor. TAFPMOS-NN motor is an accomplished both theoretical and experimental model. The results of theoretical works and experimental works are performed. TAFPMOS-NN has open-slotted structure and the winding on the core surface which are the most important properties of TAFPMOS-NN motor. This situation has created the hybrid structure electric machine by combining toroidal winding without open-slotted motor properties and toroidal winding with open-slotted motor properties. The mentioned motor types have a problem such as cogging torque. The cogging problem is resolved greatly by the proposed method so that high torque, efficiency and cost saving for TAFPMOS-NN type motor are acquired. Keywords: finite element analysis; optimization; toroidal axial flux permanent magnet open-slotted NN type motor Novi pristup u primjeni i projektiranju NN tipa motora otvorenih utora s permanentnim magnetima prstenastog aksijalnog toka (TAFPMOS-NN)Izvorni znanstveni članak Ovaj rad predstavlja novi pristup u konstrukciji motora NN tipa otvorenih utora s permanentnim magnetima prstenastog aksijalnog toka (TAFPMOS-NN). TAFPMOS-NN motor ostvarenje je i teorijskog i eksperimentalnog modela. Provjereni su rezultati teorijskih i eksperimentalnih radova. TAFPMOS-NN je konstruiran s otvorenim utorima i namotima na površini jezgre što su najvažnija svojstva TAFPMOS-NN motora. Stvoren je električni stroj hibridne strukture s kombinacijom prstenastih namota bez karakteristika motora s otvorenim utorima i prstenastih namota s karakteristikama motora s otvorenim utorima. Navedene vrste motora imaju problem zakretnog momenta zupčanika (cogging torque). Predložena metoda rješava taj problem, pa je postignuta učinkovitost i smanjenje troškova za TAFPMOS-NN tip motora.Ključne riječi: metoda konačnih elemenata; NN tip motora otvorenih utora s permanentnim magnetima prstenastog aksijalnog toka; optimizacija
Calculation of the desired motor requirement for an electric vehicle Prevention of the long analysis duration by using desing of experiment Optimization by defining the critical motor design parametersIn this study, electrical vehicle (EV) technologies, vehicle dynamic, the parameters of asynchronous motor were investigated. The performance requirements for a passenger car were calculated from the equations of vehicle dynamic. The performance characteristics of asynchronous motor were evaluated. To achieve the desired motor performance requirements, trivial parameters for asynchronous motor were eliminated by Taguchi's method. After the defining of critical parameters for asynchronous motor, the parameters of asynchronous motor were optimized. As a result, using proposed method which is given in Figure A (Taguchi method and related standard deviation value) has provided to avoid waste of time from long analysis time. Figure A. The diagram of proposed methodPurpose: The purpose of this study is to modify the required design parameters to ensure that a default asynchronous motor can meet the desired engine performance requirements. Theory and Methods:By using the Taguchi method and the related standard deviation value, the parameters of the critical motor design are determined. Then, considering the critical design parameters, the default asynchronous motor is optimized to develop the desired electric motor. Results:The determination of 6 critical design parameters and the optimization of the desired engine were carried out by the proposed method. Conclusion:The long analysis duration and time wasting for all the parameters of the asynchronous motor were prevented by using proposed method.
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