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Summary In photovoltaic power systems operating under variable atmospheric conditions, the success of maximum power point tracking (MPPT) methods is very important for efficiency. Therefore, many different MPPT methods have been developed in the literature. The voltage‐controlled MPPT method is one of the oldest methods that is easy to implement but operates with low efficiency in variable weather conditions. At variable radiation and temperature values, the voltage value that the system must generate in order to capture the MPP point was obtained by modeling the PV system by the system identification. Thus, using only system input and output information, a model was created without the need for system parameters. In this study, system modeling was performed using the Wavenet nonlinear function. The output of the system model gives the reference voltage required to capture the MPP point. Thus, the reference input voltage of the MPPT was made adaptive against changing weather conditions. By using the proposed voltage controlled MPPT method and the other conventional methods such as Incremental Conductance (IC), Perturb and Observe (PO), and Constant Voltage Controller(CVC) methods, various simulations (3 different scenario) were performed in Matlab/Simulink environment. The results obtained from simulations carried out for three different weather conditions were given comparatively. The performance of the proposed method was analyzed in detail at the change points of the temperature and radiation values, and at some other regions.

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In this study, the hysteresis based direct torque control (DTC) of a three-phase induction motor was carried out experimentally. The DTC algorithm was also modelled in the hardware environment by using FPGA's in-the-loop feature. The dSPACE DS1103 controller board was used in the experimental study and Altera DE2-115 model development board was used in the hardware modelling. Both applications had the same sample time and all of the DTC algorithm was tested within the FPGA. The hardware simulation study conducted in FPGA environment was carried out in MATLAB/Simulink environment. The experimental results were compared with the hardware simulation results obtained from FPGA. As a result of the comparison, it was shown that DTC algorithm could be realized easily in FPGA environment without experimental installation, and the obtained current, voltage and velocity graphs were similar.