Alexandru Onea

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The aim of this paper is to present a holistic approach to modeling and field programmable gate array (FPGA) implementation of a permanent magnet synchronous motor (PMSM) speed controller. The whole system is modeled in the Matlab Simulink environment. The controller is then translated to discrete time and remodeled using System Generator blocks, directly(More)
This paper presents an optimized FPGA implementation of the 5 step modified space vector modulation algorithm. The algorithm is modeled in Matlab Simulink using System Generator software from Xilinx. After validation through simulation, the algorithm is translated into a synchronous hardware automaton and then implemented in a low cost Spartan-3E FPGA(More)
This paper presents a passivity based torque control structure for a high power Permanent Magnet Synchronous Motor (PMSM) used in Electric Vehicles (EV). A comparative study is done with a parallel PI algorithm in terms of response time, settling time, stationary error and required input electrical energy to reach the desired operating point. Moreover,(More)
The control of a three phase AC motor is performed with a three phase inverter. A key role in the correct functioning of the inverter is the used modulation technique. In this paper is proposed a class of modulation algorithms for the three phase inverters which have the advantage of a very simple implementation. The equivalence between a modulation(More)
The actual trend in automotive is to reduce as much as possible pollution caused by motor vehicle emissions. This could be achieved by using electrical propulsion systems which usually contains: electrical machine, three phase voltage source inverter (VSI), voltage supply system. The main problem of the full electric vehicles represents the autonomy due to(More)
In this paper, a method for colour image comparison is proposed. An indexation step is performed using a Kohonen neural network, with the SOM (Self Organizing Map) algorithm. Therefore, a colour image in the Red, Green, Blue (RGB) space is interpreted as a 256 colour image. The comparison step, between two indexed images, is based on a global dissimilarity(More)
This paper proposes a robust Passivity Based Control (PBC) strategy for an Externally Excited Synchronous Machine (EESM) used in high power applications. The mathematical model of the EESM is obtained in Euler-Lagrange (EL) formalism which is the basis for the PBC control design. Variations of parameters are modelled as external perturbations and are(More)
The paper analyzes a variable common mode voltage injection technique for multi-phase sine wave pulse width modulation with improved computational efficiency compared to the Space-Vector Pulse Width Modulation (SVPWM) technique and fewer level switchings in the power inverter, which still achieves similar modulation and control performance in the case of(More)