Now showing items 701-720 of 2623

    • A novel converter for sinusoidal encoders 

      Benammar, Mohieddine; Ben-brahim, Lazhar; Alhamadi, Mohd A.; El-Naimi, Mohamed ( IEEE , 2006 , Conference Paper)
      The paper presents a novel and low cost method for determining the angle from sine and cosine signals generated by angular position sensors such as resolvers and sinusoidal encoders. The proposed scheme is based upon the ...
    • A novel method for estimating the angle from analog co-sinusoidal quadrature signals 

      Benammar, Mohieddine; Ben-brahim, Lazhar; Alhamadi, Mohd A.; Al-Naemi, Mohamed ( Elsevier , 2008 , Article)
      The paper presents a new low cost and accurate method for determining the angle from sine and cosine signals produced by resolvers and sinusoidal encoders. In the proposed scheme, multiple phase-shifted sinusoids (PSS) are ...
    • A new angle determination method for resolvers 

      Ben-Brahim, Lazhar; Benammar, Mohieddine; Alhamadi, Mohd; Al-Emadi, Nasser; Al-Hitmi, Mohammed ( IEEE , 2008 , Conference Paper)
      A new low cost method for converting the amplitudes of the sine/cosine signals generated by the resolver into a measure of the angle of its shaft. The new method operates without lookup tables (LUT), and takes advantage ...
    • Real Time Digital Feedback Control for VFD fed by cascaded multi-cell inverter 

      Ben-Brahim, Lazhar; Trabelsi, Mohamed; Yokoyama, Tomoki; Ino, Takayuki ( IEEE , 2010 , Conference Paper)
      Multi-cell inverter include an array of single-phase inverters capable of handling higher voltage ratings with lower rating power electronics devices. In this paper, a Real Time Digital Feedback Controller (RTDFBC) combined ...
    • A new PLL method for resolvers 

      Ben-Brahim, Lazhar; Benammar, Mohieddine ( IEEE , 2010 , Conference Paper)
      This paper describes a novel implementation of the classical PLL closed loop method without using VCO, DAC, counter and look-up tables. The proposed method makes use of the excitation signal of the resolver to estimate the ...
    • Development of a grid connected photovoltaic power conditioning system based on flying capacitors inverter 

      Trabelsi, M.; Ben-Brahim, L. ( IEEE , 2011 , Conference Paper)
      In an effort to utilize the solar energy effectively through power electronics converters (conditioners), a great deal of research is being carried out to meet the increasing demand for load. This paper proposes an ...
    • Deadbeat control with multi-sampling compensation for medium-voltage motor drives by cascaded multi-cell inverter using FPGA based hardware controller 

      Tajima, Yusuke; Hori, Yuta; Ino, Takayuki; Yokoyama, Tomoki; Ben-Brahim, Lazhar; ... more authors ( IEEE , 2011 , Conference Paper)
      Multi-cell inverter include an array of single-phase inverters capable of handling higher voltage ratings with lower rating power electronics devices. In this paper, a deadbeat control combined with a multi-sampling ...
    • Experimental photovoltaic power supply based on flying capacitors multilevel inverter 

      Trabelsi, M.; Ben-Brahim, L. ( IEEE , 2011 , Conference Paper)
      Nowadays, a great deal of research is being carried out to utilize the solar energy effectively through power electronics converters (conditioners) to meet the increasing demand for load. In this paper, a weighted Real ...
    • An original controller design for a grid connected PV system 

      Trabelsi, M.; Ghazi, K. A.; Al-Emadi, N.; Ben-Brahim, L. ( IEEE , 2012 , Conference Paper)
      PV energy generation has been one of the most active research areas in the past decades due to its inexhaustibility and environmental-friendly aspects. However, the great deal is to utilize the solar energy effectively ...
    • An improved SVPWM method for multilevel inverters 

      Trabelsi, M.; Ben-Brahim, L.; Yokoyama, T.; Kawamura, A.; Kurosawa, R.; ... more authors ( IEEE , 2012 , Conference Paper)
      This paper proposes a new general Space Vector PWM (SVPWM) method for Multi-Level Inverters (MLI) based on a generalization of dwell-times calculation. The presented scheme is developed for Cascaded H-Bridge (CHB) inverter. ...
    • A wavelet-based passive islanding detection technique 

      Fayyad, Yara; Ben-Brahim, Lazhar ( IEEE , 2012 , Conference Paper)
      Distribution power systems are radial in nature. Power flows in one direction from the utility to the load. Most protection, monitoring, and control devices are designed based on this unidirectional flow of power. Distributed ...
    • Multilevel cascaded Z source inverter for PV power generation system 

      Fayyad, Yara; Ben-Brahim, Lazhar ( IEEE , 2012 , Conference Paper)
      The paper investigates the use of multilevel cascaded Z source inverter (MC-ZSI) for photovoltaic (PV) power generation system. The control of the proposed system will take into account the multilevel modulation scheme and ...
    • An improved predictive control approach for Multilevel Inverters 

      Trabelsi, M.; Ben-Brahim, L.; Gastli, A.; Ghazi, K. A. ( IEEE , 2013 , Conference Paper)
      This paper proposes a flexible predictive control strategy for flying capacitors based Multi-Level Inverters (MLIs). The proposed controller, applied for a Flying Capacitors Inverter (FCI) and a Modular Multilevel Converter ...
    • High-reliability extra-large motor drives for oil and gas industry 

      Yoshino, T.; Masuda, H.; Hosoda, H.; Tsukakoshi, M.; Mostafa, M. A.; ... more authors ( IEEE , 2013 , Conference Paper)
      Oil and gas are the most important energy resources on the globe. They need to be transported to feed the energy to remote cities and towns. For efficient use of energy, variable frequency drives (VFD) are used in domestic ...
    • Reinforcement learning-based school energy management system 

      Chemingui, Yassine; Gastli, Adel; Ellabban, Omar ( MDPI AG , 2020 , Article)
      Energy efficiency is a key to reduced carbon footprint, savings on energy bills, and sustainability for future generations. For instance, in hot climate countries such as Qatar, buildings are high energy consumers due to ...
    • Review of optimization techniques applied for the integration of distributed generation from renewable energy sources 

      Abdmouleh, Zeineb; Gastli, Adel; Ben-Brahim, Lazhar; Haouari, Mohamed; Al-Emadi, Nasser Ahmed ( Elsevier Ltd , 2017 , Article Review)
      Several potential benefits to the quality and reliability of delivered power can be attained with the installation of distributed generation units. To take full advantage of these benefits, it is essential to place optimally ...
    • Review of policies encouraging renewable energy integration & best practices 

      Abdmouleh, Zeineb; Alammari, Rashid A.M.; Gastli, Adel ( Elsevier Ltd , 2015 , Article Review)
      This article provides policy-makers and renewable energy project developers with background information and analysis into the successful penetration of renewable energy policies. The analysis emphasizes on the different ...
    • Review and simulation of leakage current in transformerless microinverters for PV applications 

      Khan, Ahmad; Ben-Brahim, Lazhar; Gastli, Adel; Benammar, Mohieddine ( Elsevier Ltd , 2017 , Article Review)
      Designing microinverters without transformers enhances system efficiency and power density and reduces cost. However, the transformer removal results in loss of galvanic isolation that leads to leakage current circulation. ...
    • Simple voltage regulation method for smart grid applications 

      Taoube, Hussein A.; Alammari, Rashid; Gastli, Adel ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)
      The complexity of power systems and the change of demand load at the consumer make it necessary to control the voltage to avoid any unnecessary voltage drop beyond the limits allowed within the international standards and ...
    • Siting of pv power plants on inclined terrains 

      Charabi, Yassine; Rhouma, Mohamed Ben Hadj; Gastli, Adel ( Taylor and Francis Ltd. , 2014 , Article)
      Most of the studies conducted on solar energy assessment and solar system siting focus on flat terrains that are usually difficult and expensive to acquire in urban areas. This paper investigates the possibility of using ...