Yazarlar
Yayınlar
- MakaleAçık Erişim2019Scopus SJRQ3Fuzzy-logic-based robust speed control of switched reluctance motor for low and high speeds
Omaç, Zeki
Switched reluctance motor (SRM) is operated at high magnetic saturation to generate large torque. The flux linkage of SRM is a nonlinear function with phase current and rotor position because of the high magnetic saturation. Also, the performance of the speed controller for the SRM driver system can be negatively affected by noise, disturbances, and inertia of load torque. Therefore, the fuzzy speed controller for the SRM driver system was developed in this study. In addition, a dynamic model of SRM was simulated in Matlab/Simulink software. Based on the results obtained in this study, the speed of the SRM was controlled over a wide range of speeds including low and high speeds by the fuzzy speed controller. Furthermore, in simulation, the rotor speed was simulated depending on the reference speed. Moreover, the speed of the SRM was experimentally tested using the DS1103 Ace kit. Finally, simulation results were compared with experimental results and they were found to be consistent with each other.
AtıfScopus10WoS5OpenAlex9TR Dizin3
İncele - MakaleAçık Erişim2017Scopus SJRQ2A new bryophyte community and three new records for the epiphytic bryophyte vegetation of Turkey
Alataş, Mevlüt; Uyar, Güray
Based on 38 relevés, the Lewinskyetum affinis ass. nov. (Ulotion crispae alliance) was described and characterized as a new epiphytic association from the Abant Mountains (Northwest Turkey). To the best of our knowledge, this is the first report about three epiphytic bryophyte associations, namely Dicranetum taurici, Pterigynandretum filiformis, and Orthotricho straminei–Pterigynandretum filiformis, in Turkey. In addition, multivariate analysis techniques such as two-way indicator species analysis (TWINSPAN) and detrended correspondence analysis (DECORANA) were used to examine epiphytic bryophyte communities for cluster analysis and ordination analysis, respectively.
AtıfScopus7WoS5OpenAlex4İncele - MakaleYalnız künye2017Scopus SJRQ3Macroinvertebrate composition in the metarhithral zones of the Munzur and Pülümür rivers: A preliminary study
Gültekin, Zuhal; Aydin, Rahmi; Winkelmann, Carola
The aim of this work was the determination of the macroinvertebrate community in the metarhithral zones of the Munzur and Pulumur rivers. This is the first documented research on macroinvertebrates in the metarhithral zone of the Munzur and Pulumur rivers in the region of the city of Tunceli. In total, 30 taxa of 9 orders of benthic invertebrates were recorded at the four sampling sites. Larvae of Taeniopteryx caucasica (Plecoptera), Oligoneuriella baskale, and Ecdyonurus dispar (Ephemeroptera) were recorded for the first time in the province of Tunceli.
AtıfScopus10WoS6İncele - MakaleAçık Erişim2017Scopus SJRQ3Fault location determination for transmission lines with different series-compensation levels using transient frequencies
Akmaz, Duzgun; Mamiş, Mehmet Salih; Arkan, Muslum; Tagluk, Mehmet Emin
In this paper, based on the theory of traveling waves, the fault distances on long transmission lines with various series-compensation levels are determined using transient current and voltage frequencies. Transmission lines with series compensation are modeled using Alternative Transients Program software with frequency-dependent effects on the line included in the simulation. The transient current and voltage signals are obtained from the model. A fast Fourier transform is used for frequency-domain conversion and fault location is estimated from the frequencies of fault-generated harmonics in the transient spectrum. The algorithm is implemented in MATLAB. To investigate the effect of compensation on accuracy, the results are obtained for different series-compensation levels. The undesirable source-inductance effect is removed and estimation accuracy is further improved using a waveform-relaxation method. The method is found to be successful in determining fault location on series-compensated transmission lines. The effects of the compensation level, fault resistance, and phase angle are investigated.
AtıfScopus6WoS6OpenAlex7İncele - DergiTurkish Journal of Zoology
- DergiTurkish Journal of Electrical Engineering and Computer Sciences