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Effects of magnet shapes on total harmonic distortion and cogging torque in a permanent magnet synchronous generator for wind turbines

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Clean Energy 2023年第5期7卷 1058-1068页

作者： erol kurt Adem Dalcalı Gazi University Department of Electrical and Electronics EngineeringTechnology FacultyAnkaraTurkey Bandırma Onyedi Eylul University Department of Electrical and Electronics EngineeringFaculty of Engineering and Natural SciencesBandırmaBalıkesirTurkey National Research University TIIAME100000TashkentUzbekistan

This paper explores and theoretically reports the effects of different magnet structures on the cogging torque and the total harmonic distortion of the output waveforms from a permanent magnet *** generator is a radial flux machine and four different structures are considered for the magnet arrangement in the rotor component and modelled in the Ansys/Maxwell electromagnetic simulation *** three-phase machine exhibits different behaviours towards various magnet structures,***,inclined slotted rectangular,skewed double rectangular and inclined slotted skewed double rectangular,*** has been proven by finite element analysis and Fourier analysis that both the cogging and total harmonic distortion values vary significantly for all *** cogging torque values change in the range of 89.95 to 436.75 mNm and the lowest cogging torque is measured for the inclined slotted skewed double rectangular magnet geometry,while the conventional rectangular magnet geometry yields the worst value with 436.75 ***,the total harmonic distortion values varies between 1.63 and 3.55 for different magnetic *** the worst total harmonic distortion value is obtained from the inclined slotted rectangular magnet,the best total harmonic distortion is acquired from the skewed double rectangular *** these results will provide scientists and engineers with important information in order to obtain more efficient machines.

关键词： renewable energy wind power finite element method synchronous generator wind turbines

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High pressure paint gun injury of the index finger:a case report

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Plastic and Aesthetic Research 2015年第1期2卷 350-352页

作者： Memet Yazar Zeliha Gül Ali Can Günenç Sevgi kurt Yazar erol Kozanoğlu Plastic Reconstructive and Aesthetic Surgery ClinicSisli Etfal Training and Research Hospital34371 IstanbulTurkey Plastic Reconstructive and Aesthetic Surgery ClinicIstanbul Training and Research Hospital34098 IstanbulTurkey Plastic Reconstructive and Aesthetic Surgery ClinicIstanbul UniversityIstanbul Medicine Faculty34093 IstanbulTurkey

Injuries to the hand secondary to high pressure paint guns are considered to be true hand *** rare injuries may have serious outcomes,and a critical step in their management is extensive debridement performed within the first six hours following *** this reason,their diagnosis should not be delayed,and the hand surgeon should be informed immediately to initiate appropriate *** this report,the authors describe a patient who was injured with a chemical paint gun,and whose injury was not diagnosed in the emergency *** patient subsequently developed *** treatment is reported herein.

关键词： Finger injury high pressure injury trauma

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