Abstract: AC motor drives have produced and still produce a particular high impact in many technical applications. Advantages of adjusting the frequency of operation can not be fully exploited without adjustment command and control strategies through modeling of the corresponding components. Simulation of drive systems is complicated due to the nonlinear high level that they bring to the power electronics and also due to control, adjustments and protection in the transfer of power flux. Moreover, mathematical models of semiconductor and control functions, which are not yet found in many programs, require from the designer or specialist the introduction of its own version of a simulation program. It is currently known that the use of available multi-level modeling, commonly used to describe static converters and each model, can introduce undesirable effects on the behavior of an electric machine. This lecture presents the current trends of advanced control techniques and control of induction machines used for variable frequency drives, depending on the torque, speed and rotor position. The possibilities of command and control without sensors are analyzed. As well, an estimation of the results obtained by modeling and simulation of the control and an adjustable system are discussed. Finally, in the present lecture recommendations are given about how to run a simulated vector for controlled induction electric machines.

Brief Biography of the Speaker:
Dr. Marcel IONEL is actually pro-dean of Electrical Engineering Faculty, Valahia University, Targoviste, Romania. From 2004 to 2008 was the dean of his faculty. Teaching activities: “Electrical and Electronic Measurements” Has an extended expertise on functioning of asincronuos engines, power static converters, electrical energy supplied by photovoltaic systems, etc. Has published over 80 papers and has attended National and International Conferences. He also published 10 books in the field of Electrical Engineering and contributed to the proyection and instalation of the first system to produce photovoltaic energy in Romania. Actually is working in few international research projects.