Browsing by Author "Ben-Brahim, L."
Now showing items 41-52 of 52
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Precise method for linearizing sine and cosine signals in resolvers and quadrature encoders applications
Alhamadi, Mohd A.; Benammar, M.; Ben-brahim, L. ( IEEE , 2004 , Conference Paper)Resolvers and quadrature encoders provide electrical signal related to the sine and cosine of the mechanical shaft angle over the full 360 degree range. A converter is described for the linearization of these signals, ... -
Real-Time Fault Detection and Identification for MMC Using 1-D Convolutional Neural Networks
Kiranyaz S.; Gastli A.; Ben-Brahim L.; Al-Emadi N.; Gabbouj M. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)Automated early detection and identification of switch faults are essential in high-voltage applications. Modular multilevel converter (MMC) is a new and promising topology for such applications. MMC is composed of many ... -
Repetitive Control Based Pwm Inverter Dead-Time Compensation For Ac Servo Drive
Ben-Brahim, L. ( Qatar University , 2002 , Article)AC servomotor speed or current controller based on PI control and/or optimal control, can not eliminate the cyclical fluctuations of speed or current when subject to periodic disturbances. However, repetitive control ... -
Repetitive scheme plugged-in parallel with Deadbeat controller for VFD fed by cascaded multilevel inverter
Trabelsi, M.; Ben-Brahim, L.; Yokoyama, T.; Kawamura, A.; Yoshino, T.; Kurosawa, R.... more authors ... less authors ( IEEE , 2013 , Conference Paper)This paper proposes an experimental Real Time Digital Feedback Controller (RTDFBC) combined with a Repetitive technique to control a Variable Frequency Drive (VFD) fed by a cascaded Multi-Level Inverter (MLI). The proposed ... -
A Resolver Angle Estimator Based on Its Excitation Signal
Ben-Brahim, L.; Benammar, M.; Alhamadi, M.A. ( IEEE , 2009 , Article)A resolver generates a pair of signals proportional to the sine and cosine of the angular position of its shaft. A new low-cost method for converting the amplitudes of these sine/cosine transducer signals into a measure ... -
A resolver converter based upon a novel open-Loop Technique
Benammar, M.; Ben-Brahim, L.; Alhamadi, M.A.; Al-Emadi, N.; Al-Hitmi, M. ( IEEE , 2008 , Conference Paper)The paper presents a novel technique for the determination of the angle from slowly-varying quadrature co-sinusoidal signals produced, for example, by position sensors. In the presented scheme applied to a resolver, the ... -
Stability analysis of an active-damped LLCL filter- based grid-connected three-phase inverter
Massoud, A.; Ben-Brahim, L.; Hamid, A.; Williams, B.W.; Holliday, D. ( IEEE , 2014 , Conference Paper)Power passive filters are a standard solution for gridcurrent harmonics attenuation. However, these types of filters may cause a resonance between the inverter and the grid. Passive and active damping techniques are employed ... -
STATCOM using packed U-Cell 5-level converter with new control algorithm
Al-Qatouni, H.; Gastli, A.; Ben-Brahim, L. ( IEEE , 2018 , Conference Paper)This paper introduces a new control strategy for a single-phase 5-level packed U-Cell (PUC) converter that is used as a STATCOM. The proposed control method allows the regulation of the amount of reactive power (VAr) ... -
Switchless power decoupling and switchless leakage current elimination in grid-tied inverters
Khan A.; Houchati M.; Ur-Rehman J.; Ben-Brahim L.; Gastli A. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper presents a grid-tied single-phase transformerless inverter that eliminates simultaneously the leakage current issue and the double grid frequency power pulsation without additional active circuitry. The control ... -
Towards ultra high frequency and high efficiency gate drive circuits
Ghazi, K. A.; Ben-Brahim, L. (2013 , Conference Paper)Recent developments in semiconductor technology enabled developing converters with ultra high switching frequency to achieve high power densities which increased the complexity of designing optimized gate drive circuits. ... -
Virtual flux oriented sensorless direct power control of qzs inverter connected to grid for solar pv applications
Meraj M.; Rahman S.; Iqbal A.; Ben-Brahim L.; Alammari R.; Abu-Rub H.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)Impedance source inverters (Z-source and Quazi-Z-source (QZS)) are the promising converter topologies in the future generation because of the buck, boost and buck-boost modes of operation. In this paper, three phase voltage ... -
A weighted real-time predictive controller for a grid connected flying capacitors inverter
Ben-Brahim, L.; Trabelsi, M.; Ghazi, K.A.; Al-Emadi, N. ( Elsevier , 2013 , Article)This paper proposes a new controller for a grid connected power conditioning unit (PCU). The PCU consists of a flying capacitors inverter (FCI) connected to the grid through an inductor and a step-up transformer. A hybrid ...