Now showing items 3261-3280 of 8747

    • A new angle determination method for resolvers 

      Ben-Brahim, Lazhar; Benammar, Mohieddine; Alhamadi, Mohd; Al-Emadi, Nasser; Al-Hitmi, Mohammed ( IEEE , 2008 , Conference)
      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 ...
    • An improved predictive control approach for Multilevel Inverters 

      Trabelsi, M.; Ben-Brahim, L.; Gastli, A.; Ghazi, K. A. ( IEEE , 2013 , Conference)
      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 ...
    • Multilevel cascaded Z source inverter for PV power generation system 

      Fayyad, Yara; Ben-Brahim, Lazhar ( IEEE , 2012 , Conference)
      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 ...
    • A neutral point voltage balancing method for multi-level GTO inverters 

      Ben-Brahim, Lazhar ( IEEE , 2006 , Conference)
      The balancing problem of the DC-link capacitor voltage is inherent in the NPC inverter. It is extremely important to keep the upper and lower DC-link capacitor voltages balanced to guarantee the three level operation of ...
    • Experimental photovoltaic power supply based on flying capacitors multilevel inverter 

      Trabelsi, M.; Ben-Brahim, L. ( IEEE , 2011 , Conference)
      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 ...
    • A novel multilevel carrier-based PWM-control method for GTO inverter in low index modulation region 

      Ben-Brahim, Lazhar; Tadakuma, Susumu ( IEEE , 2006 , Article)
      Gate turn offs (GTOs) have an inherent minimum ON-OFF time, which is needed for their safe operation. For GTO-based three-level or neutral-point-clamped (NPC) inverters, this minimum ON-OFF pulsewidth limitation results ...
    • 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)
      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, ...
    • 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 ...
    • Development of a grid connected photovoltaic power conditioning system based on flying capacitors inverter 

      Trabelsi, M.; Ben-Brahim, L. ( IEEE , 2011 , Conference)
      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 ...
    • 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)
      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 high precision resolver-to-DC converter 

      Benammar, Mohieddine; Ben-Brahim, Lazhar; Alhamadi, Mohd A. ( IEEE , 2005 , Article)
      A newly developed resolver converter, providing a pseudolinear voltage proportional to the shaft angle, is presented. This converter is based on a new concept involving the absolute values of the demodulated sine and cosine ...
    • Speed control of induction motor without rotational transducers 

      Ben-Brahim, Lazhar; Tadakuma, Susumu; Akdag, Alper ( IEEE , 1999 , Article)
      This paper describes a newly developed speed sensorless drive based on neural networks. A backpropagation neural network is used to provide real-time adaptive identification of the motor speed. The estimation objective is ...
    • A new PLL method for resolvers 

      Ben-Brahim, Lazhar; Benammar, Mohieddine ( IEEE , 2010 , Conference)
      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 ...
    • Digital control for UPS inverters 

      Ben-Brahim, Lazhar; Yokoyama, Tomoki; Kawamura, Atsuo ( IEEE , 2003 , Conference)
      PWM inverters digital controls with dead-beat re sponse, for UPS applications, are reviewed. To improve the output waveforms of the PWM inverter, several modern control techniques are applied together with the deadbeat ...
    • A Novel Resolver-to-360° Linearized Converter 

      Benammar, Mohieddine; Ben-Brahim, Lazhar; Alhamadi, Mohd A. ( IEEE , 2004 , Article)
      A novel and simple resolver-to-dc converter is presented. It is shown that by appropriate processing of the sine and cosine resolver signals, the proposed converter may produce an output voltage proportional to the shaft ...
    • A new iterative learning control method for PWM inverter current regulation 

      Ben-Brahim, Lazhar; Benammar, Mohieddine; Alhamadi, Mohd A. ( IEEE , 2003 , Conference)
      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. PWM inverters output waveforms ...
    • The simultaneous impact of EV charging and PV inverter reactive power on the hosting distribution system's performance: A case study in kuwait 

      Abdullah, Heba M.; Kamel, Rashad M.; Tahir, Anas; Sleit, Azzam; Gastli, Adel ( MDPI AG , 2020 , Article)
      Recently, electric vehicles (EVs) have become an increasingly important topic in the field of sustainable transportation research, alongside distributed generation, reactive power compensation, charging optimization, and ...
    • An adaptive network coding scheme for multipath transmission in cellular-based vehicular networks 

      Yin, Chenyang; Dong, Ping; Du, Xiaojiang; Zheng, Tao; Zhang, Hongke; ... more authors ( MDPI AG , 2020 , Article)
      With the emergence of vehicular Internet-of-Things (IoT) applications, it is a significant challenge for vehicular IoT systems to obtain higher throughput in vehicle-to-cloud multipath transmission. Network Coding (NC) has ...
    • COVID-19 Optimizer Algorithm, Modeling and Controlling of Coronavirus Distribution Process 

      Hosseini, Eghbal; Ghafoor, Kayhan Zrar; Sadiq, Ali Safaa; Guizani, Mohsen; Emrouznejad, Ali ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)
      The emergence of novel COVID-19 is causing an overload on public health sector and a high fatality rate. The key priority is to contain the epidemic and reduce the infection rate. It is imperative to stress on ensuring ...
    • An IoT and Edge Computing Based Framework for Charge Scheduling and EV Selection in V2G Systems 

      Chamola, Vinay; Sancheti, Ashutosh; Chakravarty, Sombuddha; Kumar, Neeraj; Guizani, Mohsen ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)
      The daily fluctuations in the power requirements and the regulation of voltage and frequency cause substantial energy dissipation. These lead to a reduction in the operational efficiency of the power grid. V2G (Vehicle 2 ...