The Experts below are selected from a list of 7431 Experts worldwide ranked by ideXlab platform

Didier Lalevee - One of the best experts on this subject based on the ideXlab platform.

  • Design Optimization of a Hybrid-Excited Flux-Switching Machine for Aircraft safe DC Power Generation using a Diode Bridge Rectifier
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: André Nasr, Mathieu Mairie, Sami Hlioui, Mohamed Gabsi, Didier Lalevee
    Abstract:

    This paper presents a design optimization methodology of a hybrid-excited flux-switching machine (HEFSM) for aircraft dc power generation. Hybrid machines are favored in new aircraft embedded generation systems because of their high power density. Their flux control capability allows the use of the more reliable diode Bridge Rectifier and makes them suitable for wide-speed-range dc power generation. However, in order to respect aviation safety requirements, these machines must have a limited remanent voltage, and, therefore, an optimal design is needed. At first, the electromagnetic performances of the HEFSM are studied using a transient finite-element model. In order to perform design optimization, a static method is used instead. This method is shown to be much less time consuming and more suitable for optimization routines. The results have shown very promising performances of the new design. Despite having a very small remanent voltage, high power density has still been achieved.

  • Design Optimization of a Hybrid-Excited Flux-Switching Machine for Aircraft safe DC Power Generation using a Diode Bridge Rectifier
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: André Nasr, Mathieu Mairie, Sami Hlioui, Mohamed Gabsi, Didier Lalevee
    Abstract:

    This paper presents a design optimization methodology of a Hybrid-Excited Flux-Switching Machine (HEFSM) for aircraft DC power generation. Hybrid machines are favored in new aircraft embedded generation systems because of their high power density. Their flux control capability allows the use of the more reliable diode Bridge Rectifier and makes them suitable for wide-speed-range DC power generation. However, in order to respect aviation safety requirements, these machines must have a limited remanent voltage and therefore an optimal design is needed. At first, the electromagnetic performances of the HEFSM are studied using a transient FE model. In order to perform design optimization, a static method is used instead. This method is shown to be much less time consuming and more suitable for optimization routines. The results have shown very promising performances of the new design. Despite having a very small remanent voltage, high power density has been still achieved.

G. Narayanan - One of the best experts on this subject based on the ideXlab platform.

  • a simple analog controller for single phase half Bridge Rectifier
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: R. Ghosh, G. Narayanan
    Abstract:

    A simple analog controller is proposed for the single-phase half-Bridge pulsewidth modulation Rectifier to maintain near unity power factor at the input and balance the voltages across each half of the dc bus. The controller works in the principle of constant-frequency current programmed control. The required gating pulses are generated by comparing the input current with a linear and bipolar carrier without sensing the input voltage. Two voltage controllers and a single reset-integrator are used to generate the carrier. All the necessary control operations are performed without using any phase locked loop, multiplier, and/or divider circuits. Resistor based sensors are used to measure the voltages across two halves of the dc bus and the input current. The controller can be fabricated as a single integrated circuit. The averaged small signal models and all the necessary design equations are provided. The condition of stability against subharmonic oscillation is analyzed. Calculation of switching and conduction losses is presented. The control concept is validated through simulation and also experimentally on an 800-W half-Bridge Rectifier. Experimental results are presented for ac-dc application, and also for ac-dc-ac application with both linear and nonlinear loads at two different output fundamental frequencies (50 and 60Hz)

  • A Simple Analog Controller for Single-Phase Half-Bridge Rectifier and its Application to Transformerless UPS
    2005 IEEE 36th Power Electronics Specialists Conference, 2005
    Co-Authors: R. Ghosh, G. Narayanan
    Abstract:

    A simple, low-cost, constant frequency, analog controller is proposed for the front-end half-Bridge Rectifier of a single-phase transformerless UPS system to maintain near unity power factor at the input and zero dc-offset voltage at the output. The controller generates the required gating pulses by comparing the input current with a periodic, bipolar, linear carrier without sensing the input voltage. Two voltage controllers and a single integrator with reset are used to generate the required carrier. All the necessary control operations can be performed without using any PLL, multiplier and/or divider. The controller can be fabricated as a single integrated circuit. The control concept is validated through simulation and also experimentally on an 800 W half-Bridge Rectifier. Experimental results are presented for ac-dc application, and also for ac-dc-ac UPS application with both sinusoidal and nonlinear loads. The simulation and experimental results agree well

André Nasr - One of the best experts on this subject based on the ideXlab platform.

  • Design Optimization of a Hybrid-Excited Flux-Switching Machine for Aircraft safe DC Power Generation using a Diode Bridge Rectifier
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: André Nasr, Mathieu Mairie, Sami Hlioui, Mohamed Gabsi, Didier Lalevee
    Abstract:

    This paper presents a design optimization methodology of a hybrid-excited flux-switching machine (HEFSM) for aircraft dc power generation. Hybrid machines are favored in new aircraft embedded generation systems because of their high power density. Their flux control capability allows the use of the more reliable diode Bridge Rectifier and makes them suitable for wide-speed-range dc power generation. However, in order to respect aviation safety requirements, these machines must have a limited remanent voltage, and, therefore, an optimal design is needed. At first, the electromagnetic performances of the HEFSM are studied using a transient finite-element model. In order to perform design optimization, a static method is used instead. This method is shown to be much less time consuming and more suitable for optimization routines. The results have shown very promising performances of the new design. Despite having a very small remanent voltage, high power density has still been achieved.

  • Design Optimization of a Hybrid-Excited Flux-Switching Machine for Aircraft safe DC Power Generation using a Diode Bridge Rectifier
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: André Nasr, Mathieu Mairie, Sami Hlioui, Mohamed Gabsi, Didier Lalevee
    Abstract:

    This paper presents a design optimization methodology of a Hybrid-Excited Flux-Switching Machine (HEFSM) for aircraft DC power generation. Hybrid machines are favored in new aircraft embedded generation systems because of their high power density. Their flux control capability allows the use of the more reliable diode Bridge Rectifier and makes them suitable for wide-speed-range DC power generation. However, in order to respect aviation safety requirements, these machines must have a limited remanent voltage and therefore an optimal design is needed. At first, the electromagnetic performances of the HEFSM are studied using a transient FE model. In order to perform design optimization, a static method is used instead. This method is shown to be much less time consuming and more suitable for optimization routines. The results have shown very promising performances of the new design. Despite having a very small remanent voltage, high power density has been still achieved.

Mohamed Gabsi - One of the best experts on this subject based on the ideXlab platform.

  • Design Optimization of a Hybrid-Excited Flux-Switching Machine for Aircraft safe DC Power Generation using a Diode Bridge Rectifier
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: André Nasr, Mathieu Mairie, Sami Hlioui, Mohamed Gabsi, Didier Lalevee
    Abstract:

    This paper presents a design optimization methodology of a hybrid-excited flux-switching machine (HEFSM) for aircraft dc power generation. Hybrid machines are favored in new aircraft embedded generation systems because of their high power density. Their flux control capability allows the use of the more reliable diode Bridge Rectifier and makes them suitable for wide-speed-range dc power generation. However, in order to respect aviation safety requirements, these machines must have a limited remanent voltage, and, therefore, an optimal design is needed. At first, the electromagnetic performances of the HEFSM are studied using a transient finite-element model. In order to perform design optimization, a static method is used instead. This method is shown to be much less time consuming and more suitable for optimization routines. The results have shown very promising performances of the new design. Despite having a very small remanent voltage, high power density has still been achieved.

  • Design Optimization of a Hybrid-Excited Flux-Switching Machine for Aircraft safe DC Power Generation using a Diode Bridge Rectifier
    IEEE Transactions on Industrial Electronics, 2017
    Co-Authors: André Nasr, Mathieu Mairie, Sami Hlioui, Mohamed Gabsi, Didier Lalevee
    Abstract:

    This paper presents a design optimization methodology of a Hybrid-Excited Flux-Switching Machine (HEFSM) for aircraft DC power generation. Hybrid machines are favored in new aircraft embedded generation systems because of their high power density. Their flux control capability allows the use of the more reliable diode Bridge Rectifier and makes them suitable for wide-speed-range DC power generation. However, in order to respect aviation safety requirements, these machines must have a limited remanent voltage and therefore an optimal design is needed. At first, the electromagnetic performances of the HEFSM are studied using a transient FE model. In order to perform design optimization, a static method is used instead. This method is shown to be much less time consuming and more suitable for optimization routines. The results have shown very promising performances of the new design. Despite having a very small remanent voltage, high power density has been still achieved.

  • control of a hybrid excitation synchronous generator connected to a diode Bridge Rectifier supplying a dc bus in embedded applications
    Iet Electric Power Applications, 2013
    Co-Authors: Rita Mbayed, Georges Salloum, Lionel Vido, Eric Monmasson, Mohamed Gabsi
    Abstract:

    This study deals with the modelling and the control of the hybrid excitation synchronous machine connected to a diode Bridge Rectifier. The set operates as a DC generator that supplies an isolated grid in embedded applications such as aircraft electrical power generation. The elaborated model includes the magnetic circuit saturation effect. The aim of the control is to maintain the DC bus voltage constant when the load and/or the speed of the rotor vary. Simulation results and experiments validate the approach. The electrical parameters of the laboratory prototype machine are identified prior to the control test.

R. Ghosh - One of the best experts on this subject based on the ideXlab platform.

  • a simple analog controller for single phase half Bridge Rectifier
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: R. Ghosh, G. Narayanan
    Abstract:

    A simple analog controller is proposed for the single-phase half-Bridge pulsewidth modulation Rectifier to maintain near unity power factor at the input and balance the voltages across each half of the dc bus. The controller works in the principle of constant-frequency current programmed control. The required gating pulses are generated by comparing the input current with a linear and bipolar carrier without sensing the input voltage. Two voltage controllers and a single reset-integrator are used to generate the carrier. All the necessary control operations are performed without using any phase locked loop, multiplier, and/or divider circuits. Resistor based sensors are used to measure the voltages across two halves of the dc bus and the input current. The controller can be fabricated as a single integrated circuit. The averaged small signal models and all the necessary design equations are provided. The condition of stability against subharmonic oscillation is analyzed. Calculation of switching and conduction losses is presented. The control concept is validated through simulation and also experimentally on an 800-W half-Bridge Rectifier. Experimental results are presented for ac-dc application, and also for ac-dc-ac application with both linear and nonlinear loads at two different output fundamental frequencies (50 and 60Hz)

  • A Simple Analog Controller for Single-Phase Half-Bridge Rectifier and its Application to Transformerless UPS
    2005 IEEE 36th Power Electronics Specialists Conference, 2005
    Co-Authors: R. Ghosh, G. Narayanan
    Abstract:

    A simple, low-cost, constant frequency, analog controller is proposed for the front-end half-Bridge Rectifier of a single-phase transformerless UPS system to maintain near unity power factor at the input and zero dc-offset voltage at the output. The controller generates the required gating pulses by comparing the input current with a periodic, bipolar, linear carrier without sensing the input voltage. Two voltage controllers and a single integrator with reset are used to generate the required carrier. All the necessary control operations can be performed without using any PLL, multiplier and/or divider. The controller can be fabricated as a single integrated circuit. The control concept is validated through simulation and also experimentally on an 800 W half-Bridge Rectifier. Experimental results are presented for ac-dc application, and also for ac-dc-ac UPS application with both sinusoidal and nonlinear loads. The simulation and experimental results agree well