Ali Saygin

DSP based fuzzy-neural speed tracking control of brushless DC motor

In this paper, Fuzzy-Neural control architecture is applied in order to construct precise speed control of brushless DC motor (BLDC) in high performance applications. BLDC motors have been becoming popular owing to high torque density, large power to weight ratio, high efficiency, high power factor, and robustness. The proposed controller is successfully implemented in real time using a digital signal processor (DSP) board DS1104 for BLDC motor. The effectiveness of the proposed controller is verified by as well as experimental results of different dynamic operating conditions. The software of system is developed in dSPACE Control Desk.

A different model of WECS connected to smart grid through matrix converter

Rapid depletion of fossil fuels which the main source of origin of electric energy production is a major problem. To overcome this problem, it is an opportunity for renewable energy sources. Electric energy generation with wind turbines system is becoming more widely used. The energy quality is an important issue. In particular, power quality must be ensured for costumers especially industrial type applications. In this study, a micro grid fed by the wind turbine system to meet the energy requirements of an industrial plant is developed. High quality and stable electricity for three-phase AC Matrix Converter was used.

Smart grid integration of micro hybrid power system using 6-switched 3-level inverter

A hybrid power system modeled in Matlab/Simulink environment is presented in this study. This model includes a hybrid system consisting of wind and solar panels and it is connected to the smart grid through a 6-switched 3-level inverter. A 6-switched 3-level inverter is preferred in this study as an inverter due to its success in minimizing the harmonics. The signals required for the operation of the semiconductor switches within the inverter are obtained by the space-vector pulse width modulation technique. The system fed the receivers by generating electricity energy and sent the generated excess energy to the grid (grid) on favorable conditions, that is, when wind and/or sun are sufficient for energy production. The receivers are fed by the grid on unfavorable conditions. By means of analyzing the performance of the system, it is determined that the system is stable.

6-switched 3-level inverter for PV power quality enhancement in smart grid application

This paper presents the integration of the photovoltaic panels which are modeled in the Matlab/Simulink to the smart grid using a 6-switched 3-level inverter. The system generates electricity by photovoltaic panels and feed load via 6-switched 3-level inverter. To reduce harmonics in the system and increase the quality of the generated signal, 6-switched 3-level inverter, which is contain an alternative topology to multi-level inverter topologies, is used. The required signals are generated for the operation of the inverting IGBTs using the space vector pulse width modulation technique. The system has fed the loads by generating electricity energy when the photovoltaic panels are favorable in terms of the energy production. By analyzing the performance of the modelled system the stability level is investigated. At the end of the process, a productive model has been developed in terms of power stability and quality.

Aynı Fiziksel ve Elektromanyetik Parametreler Altında EASMSM ve ORSMSM’un Vuruntu Torkuna göre Karşılaştırılması

Eksenel akili sabit miknatisli senkron motor (EASMSM) ve outrunner sabit miknatisli senkron motor (ORSMSM) siklikla kullanilan doner tip motor cesitleridir. Elektrik motorlari icin vuruntu torkunun istenmeyen bir ciktidir. Yuksek devirlerde calisirken vuruntu torku eylemsizlik momenti sayesinde onemli bir problem olmamasina ragmen, dusuk devirlerde vuruntu torku ustesinden gelinmesi gereken bir ciddi sorundur. Ozellikle bir uydu uzerindeki gunes panellerinin hareketi icin vuruntu torku en aza indirilmelidir. Vuruntu torku surekli miknatisli senkron motorlarin tasariminda cok onemli bir unsur oldugundan dolayi, bu calismada sadece vuruntu torkuna odaklanilmistir. Bu amacla, elektromanyetik analiz programinda tasarlanan modeller vuruntu torkuna gore karsilastirilmistir. Boylece en az vuruntu torku istenen uygulamalar icin ne tip motorun tercih edilmesi gerektigi gosterilmistir.

Design optimization for minimizing cogging torque in Axial Flux Permanent Magnet machines

This paper deals with the optimization of a single side Axial Flux Permanent Magnet machine (AFPMM) designs with respect to cogging torque. Although the AFPMMs run generally at high speed and high torque, these machines may run at lower operational speed for aircraft applications. At lower operational speed, the cogging torque is an undesirable effect. Firstly, a reference AFPMM is designed with Finite Element Methods (FEM) and is analyzed with Finite Element Analysis (FEA) in Ansoft Maxwell. According to analysis results, it is seen that the cogging torque of reference model is 6.53% of machines torque. Secondly, a parametric analysis is realized to find better stator and rotor height to lower cogging torque. Third, design parameters of AFPMM are estimated with artificial intelligence methods for minimum cogging torque under constant output torque in MATLAB. Finally, all methods are compared and discussed. The best parameters are modified according to the optimal results. In this part, different methods of the optimization problem of the AFPMM are presented.

Speed control of an induction motor by 6-switched 3-level inverter

Abstract This paper presents speed control analysis of an induction motor by a 6-switched 3-level inverter. In the analysis of topology, the study used the field oriented control technique which is widely used in the literature, easy and stable for operating systems. The field weaking technique was used for speeds exceeding nominal speed to reduce magnetic saturation and thermal losses. At the end of the process, it was observed to increase motor torque and inverter efficiency. Instead of using 12 switches in conventional 3-level inverters, 6 switches are used in this topology. Reduced number of switches is the greatest contribution of this study.

Energy consuption monitoring with smart lamp socket for smart grid via M2M platform

Main problem of energy is limited energy resources, because the energy consumption rapidly increases. Furthermore, efficiently use of energy is a way to reduce the problem. In this study, a smart lamp socket unit was developed to report the consumption values of the energy and to measure energy consumption in the lighting area where the consumption of electric energy is generally high. The smart lamp socket is able to communicate via wireless network connection and internet protocol. A machine to machine (M2M) platform has been developed for easily accessible user interaction, energy consumption tracking, management and reporting thanks to the smart lamp socket. Using the M2M platform, many smart lamp socket unit can be communicated at the same time. Thus any costumer can directly manage to save energy according to reported consumption data and observed the energy consumption in the lighting fields.

Speed control of induction motor by 6-switched 3-level inverter

This paper presents speed control studies of induction motor by 6-switched 3-level inverter. In topology, the field oriented control technique used which is widely used in the literature, easy and stable for operating systems. The field weakening technique done for exceed speeds to nominal speed to reduce magnetic saturation and thermal losses. End of the process, it has been observed to increase of motor torque and inverter efficiency. Instead of using 12 switches in conventional 3-level inverters, 6 switches are used in this topology. The reduced number of switches is the greatest contribution of this work.

Fuzzy logic based control of a loaded asynchronous motor using a 6-switched 3-level inverter

This paper presents a fuzzy logic based speed control of an asynchronous motor by a 6-switched 3-level inverter. This inverter topology contains a new and alternative model to multi-level inverter topologies. The fuzzy logic controller and the space vector pulse width modulation techniques are used to generate the necessary signals for the inverter. The asynchronous motor is run without load and with load, respectively, and speed responses are then observed. The fairly low total harmonic distortion values obtained successfully demonstrated that a 6-switched 3-level inverter with fuzzy logic controller can be used in industrial applications.