In agricultural systems, significant amount of energy is consumed during irrigation periods. Therefore operating irrigation systems with electrical energy produced by solar energy is very important. It is be possible to operate irrigation systems which have small-pump power like dripirrigation with electrical energy produced by solar energy. Electrical energy produced by photovoltaic panels can vary from the estimated value due to environmental factors. Consequently analysis of a real system's performance is important. Thus, more correct projections can be made for the systems which will be designed. In this study, induction motor-pump mechanism for drip-irrigation system is operated with photovoltaic generator. Solar energy capacity of the established system is evaluated by measurements in irrigation periods. By means of simulations, power values produced by system and gained from the actual system are compared. Additionally the performance of induction motor is analyzed with the help of the driver system that increases the efficiency and controls the motor. As regards of results, design values of the drip-irrigation systems fed with solar energy in Southeastern Anatolian Regions of Turkey are obtained. Performance results of induction motor controlled with driver are also provided.

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Öz: Amaç: Bu çalışmada, üç fazlı bir matris çevirici ile beslenen paralel bağlı iki sürekli mıknatıslı senkron motorun (SMSM) sürülmesi için bir kontrol yöntemi sunulmuştur. Matris çevirici ve SMSM' yi içeren sürü-cü sistemi Matlab paket programı kullanılarak modellenmiştir. Endüstrideki uygulamalarda, tek bir çevirici tarafından beslenen paralel bağlı motorların kullanıl-maya başlamasıyla birlikte donanımın boyutları küçül-mekte, güç elektroniği anahtarları ve diğer bileşenleri azalmakta ve kurulum maliyeti düşmektedir. Paralel bağlı SMSM sürücü sistemi bu gereksinimlerin birçoğuna cevap vermektedir. Motorların sürülmesi için birçok yöntem geliştirilmiştir. Yöntem: Bu çalışmada, her iki makinenin akım ve hızlarının ortalaması alına-rak vektör kontrol tekniğinin uygulandığı ortalama hız kontrol yöntemi önerilmiştir. Sonuç: Eş yüklü ve farklı yük koşullarındaki hız, moment ve akım grafikleri incelenmiştir.Anahtar Kelimeler: Matris Çevirici, Çoğul Motor Sürücüleri, SMSM, Vektör Kontrol, Paralel Çalışma Abstract: In this study, a control method is presented for driving parallel connected two identical permanent magnet synchronous motors (PMSM) fed by a threephase matrix converter. The drive system including the matrix converter and PMSM has been modelled by using Matlab package program. In industrial applications, a high power/weight ratio, less number of power electronic devices and components and low cost are required from a drive system. The proposed structure of the drive system having two parallel connected PMSMs meets most of those requirements. Various methods have been developed to control parallel connected motors. In this study, average speed control method has been proposed where the vector control technique was implemented by taking average of the currents and speeds of both machines. Simulation results for the speed, torque and currents at co-load and different load conditions were examined.

Preliminary communicationIn this study, a control method is created to drive two parallel-connected permanent magnet synchronous motors fed by a single converter. Matrix converter used in this work provides ac-ac conversion in one stage. The matrix converter model and d-q model of dual PMSMs are performed in Matlab/Simulink. In industrial applications containing dual motors fed from a single converter, volume and weight of the drive system decreases, power electronics switches and other components are reduced and the installation cost decreases. Because of these advantages, many methods are being developed by researchers to control the dual motor drives. In this study, the motor control has been performed by using the average speed method. Control of dual permanent magnet synchronous motors with a single converter is implemented with ANFIS-based neural fuzzy controllers. All parameters of the motors are taken equal since two identical permanent magnet synchronous motors are considered. Two various operation conditions are investigated in the simulation. In the first case, one of the identical motors is operated on no-load, while the other one is operated with the rated load. In the second case, each motor is operated with various load torques varying with the time. Corresponding simulation results have been presented to show the performance of the drive system. Keywords: dual motor drives; matrix converter; neural fuzzy; PMSM; variable load; vector control Metoda upravljanja pogonom sinhronih motora s dvostrukim trajnim magnetom napajanih pretvaračem s jednom matricomPrethodno priopćenje U ovom je radu predstavljena metoda upravljanja pogonom dva sinhrona motora s paralelno povezanim trajnim magnetom, napajana jednim pretvaračem. Ovdje primijenjeni matrični konverter omogućuje ac-ac konverziju u jednom stupnju. Model matričnog konvertera i d-q model dvostrukih PMSMs izvode se u Matlab/Simulink-u. U industrijskim primjenama s dvostrukim motorima napajanim iz jedinstvenog pretvarača, smanjuje se volumen i težina pogonskog sustava, reduciraju se energetsko elektronički prekidači i druge komponente i smanjuju instalacijski troškovi. Zbog ovih su prednosti razvijene mnoge metode za upravljanje dvostrukim motornim pogonom. U ovom se istraživanju upravljanje motorom izvodi primjenom metode prosječne brzine. Upravljanje sinhronim motorima s dvostrukim permanentnim magnetom s jednim pretvaračem provodi se s neuronskim fuzzy regulatorima na bazi ANFIS-a. Svi se parametri motora smatraju jednakima budući da se razmatraju dva identična sinhrona motora s permanentnim magnetima. U simulaciji se istražuju dva različita uvjeta rada. U prvom slučaju, jedan od identičnih motora radi bez opterećenja, a drugi s nazivnim opterećenjem. U drugom slučaju, svaki motor radi s različitim momentima opterećenja koji variraju s vremenom. Prikazani su odgovarajući rezultati simulacije kako bi se pokazala učinkovitost pogonskog sustava.

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