Yazar "Cernat, M." seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Ageing of photovoltaic cells under Concentrated Light(Institute of Electrical and Electronics Engineers Inc., 2016) Cotfas, D.T.; Cotfas, P.A.; Floroian, D.; Floroian, L.; Cernat, M.A novel Automated System for Cooling and Measurement under Concentrated Light (ASCMCL) and a new method to study the accelerated ageing of photovoltaic cells by using concentrated light are presented. The measurement system created is an autonomous one that can be used without surveillance. By using the new method proposed in this paper, the time of the ageing accelerated test is significantly reduced. The measurements performed at the Solar Technology Laboratory of Paul Scherrer Institute, Villigen, Switzerland confirm the utility of the proposed system and method. © 2015 IEEE.Öğe Fault detection in synchronous motor drives, a co-simulation approach(Institute of Electrical and Electronics Engineers Inc., 2016) Apostoaia, C.M.; Cernat, M.This paper presents a multi-domain co-simulation based approach to identify faults in large power industrial three-phase synchronous motor drives. The goal is to develop an integrated simulation platform capable to capture faults caused by failing electronic components of the brushless exciter, as one of the key parts of these drives. The signal signature analysis is used for monitoring the operation of the excitation field fed through a full wave diode bridge rectifier with failing power diodes. Simulated faults of the synchronous machine are analyzed, focusing on one shorted rotor pole internal fault. The approach is based on the co-simulation of the synchronous motor finite element analysis (FEA) model, using ANSYS Maxwell™ software, with the brushless exciter and mechanical load models built with ANSYS Simplorer™. © 2015 IEEE.Öğe An induction motor design for urban use electric vehicle(Institute of Electrical and Electronics Engineers Inc., 2016) Guneser, M.T.; Dalcali, A.; Ozturk, T.; Ocak, C.; Cernat, M.Because of fossil fuel shortage and its damages on environment, electric vehicles (EV) are going to be more popular in science and car industry as well. So, EV's take an opportunity to spread over the traffic finally. But battery, which is the main energy supplier of the motor, has disadvantages as big volume and weight. Scientists try to enhance energy densities, ranges and quicken charging. All of research results force us to drive EV in a loop, close to charging stations for near future. So EV's should be designed by considering urban road and speed conditions as well. In this survey, we designed a new two pole 7,5 kW induction motor for a certain electric vehicle, which was designed to use urban drive. We considered urban traffic rules and conditions, while designing the motor. We simulated and verified analytical and finite element analysis of the designed induction motor. We also modelled and simulated the EV with the induction motor on MATLAB to observe control performance of field oriented control (FOC) on several urban use scenarios. According to our results, EV with designed motor can be realized and controlled. © 2016 IEEE.Öğe A novel sensorless field oriented controller for Permanent Magnet Synchronous Motors(Institute of Electrical and Electronics Engineers Inc., 2014) Aygun, H.; Gokdag, M.; Aktas, M.; Cernat, M.In this paper, a Particle Swarm Optimization based PI controller (PSO-PI) is used for control the speed and the torque of a Permanent Magnet Synchronous Motor (PMSM) while a Model Reference Adaptive System (MRAS) based on an Artificial Neural Network (ANN) estimation mechanism is applied to estimate sensorless the speed. In order to show the capability of the proposed PSO-PI controller, it is compared with a Fuzzy-Logic PI controller and with a classical PI controller. The simulation results prove the usefulness of the proposed PSO-PI controller. © 2014 IEEE.
