Omessaad Elbeji

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Certainly many applications in industrial field have begun to require nowadays high power. However some industrial appliances require for their operation medium or low power. So using a high power source for all types of loads may be a benefic solution to some motors, while it makes damage for other loads. For this reason multilevel inverter has been(More)
Multilevel inverters have been today in favour of academic domain as well as industrial field. Because of high power and the capacity to minimize harmonic level, multilevel inverters is strongly introduced, in the recent decades, in power applications. This paper presents a review on most important topologies and techniques of control of multilevel(More)
The control of a machine requires measurements on a few quantities which are often difficult to measure; usually a speed measurement is required for controlling a permanent magnet synchronous motor. While the use of position and speed sensors can reduce the control performance. The use of observers may be a potential solution for a sensorless control. This(More)
Due to their advantages in high-voltage and high-power applications, the use of multilevel converters has significantly increased. In other side wind turbine conversion system is continuing to increase. Then, the use of multilevel converters in wind energy conversion systems can avoid such problems. In this paper, flying capacitor, three level converter is(More)
Recently, variable speed has become very important for electric drives. For this reason, power electronics are developed. So many methods that guarantee a variable speed to control the alternate drive are proposed. Such as, stand-alone inverters are controlled in pulse width modulations (PWM) and using space vector modulation (SVM). This paper presents a(More)
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