PLC-controlled dual machine drive for dynamic load simulation

U ovom radu osmišljen je i realiziran eksperimentalni dvomotorni pogon za simuliranje dinamičkog tereta temeljen na opremi proizvođača Mitsubishi. Opisani su potrebni podsustavi za realizaciju eksperimentalnog postava (trofazni pretvarač snage, motor, inkrementalni davač impulsa), te je opisan upravljački sklop koji je realiziran pomoću PLC (engl. Programmable logical controller) sustava. Obrađena je nužna matematička formulacija za definiranje dinamike sinkronog motora s permanentnim magnetima (engl. Permanent magnet synchronous motor), uz izrađene simulacijske modele u programskom paketu Matlab/Simulink™ . Nadalje, projektirani su sustavi regulacije momenta/struje i brzine vrtnje pogona korištenjem principa metode optimuma dvostrukog odnosa i simetričnog optimuma uz primjenu različitih struktura regulatora brzine vrtnje (PI, I-P). U svrhu validacije predložene metodologije ispitani su simulacijski modeli i eksperimentalni postav u karakterističnim režimima rada, odnosno kombinacijama momenta opterećenja i brzine vrtnje pogona.In this paper, an experimental two-motor dynamic load simulator based on Mitsubishi equipment was designed and implemented. The necessary subsystems for the implementation of the experimental setup (three-phase power converter, motor, incremental impulse encoder) are described, including a controller system implemented with the PLC (Programmible logical controller). The necessary mathematical formulation for defining the dynamics of a Permanent magnet synchronous motor was elaborated, with simulation models developed in the Matlab/Simulink ™ software package. Furthermore, torque / current control and drive speed control systems have been designed using the principles of the dual ratios optimum and symmetric optimum methods using different structures of the speed controller (PI, I-P). For the purpose of validation of the proposed methodology, simulation models and experimental setup in characteristic operating modes, i.e. combinations of load torque and drive speed were tested