The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform

Ahmed Masmoudi - One of the best experts on this subject based on the ideXlab platform.

  • Analytical Prediction of the No-Load Operation Features of Tubular-Linear Permanent Magnet Synchronous Machines
    IEEE Transactions on Magnetics, 2016
    Co-Authors: Amal Souissi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    This paper is aimed at an analytical approach to predict the no-load operation features of tubular-linear permanent magnet synchronous Machines (T-LPMSMs). These are currently considered as viable candidates for wave energy conversion. The developed approach is based on the derivation of the air-gap flux density, considering both the first- and second-type modified Bessel functions of appropriate orders. Following its formulation, the air-gap flux density is applied for the prediction of the no-load operation features, with a focus on the cogging force, the phase flux linkages, and the back electromotive forces. A case study is treated considering three axial arrangements of a T-LPMSM, such as the case of an infinite Length Machine, the case of a finite Length Machine, and the case of a finite Length Machine enabling a quasi-cancellation of the end effect. A comparison between the analytically predicted features and those numerically computed by a 2-D finite-element analysis has led to good agreement.

  • No-load Features of T-LSMs With Quasi-Halbach Magnets: Application to Free Piston Engines
    IEEE Transactions on Energy Conversion, 2016
    Co-Authors: Mohamed Wael Zouaghi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is devoted to the prediction followed by the enhancement of the no-load features of tubular linear synchronous Machines (T-LSMs) with quasi- Halbach magnetized PMs in the mover. The study is initiated by the prediction of the spatial repartition of the no-load air gap flux density. Then, a formulation of the back-EMF and the cogging force, based on the predicted spatial repartition of the no-load air gap flux density, is developed, considering 1) the case of an infinite Length Machine and 2) the case of a finite Length one. A case study, corresponding to an initial concept, is treated with the prediction of its no-load features. The study is extended to the enhancement of these features with emphasis on the effects of two influent sizing parameters, assuming an infinite Length Machine. This enables the identification of a preoptimized concept. The back-EMF and the cogging force of this latter are then predicted in the case of a finite Length Machine. A further enhancement of these features is gained, thanks to a quasicancellation of the end effect. The prediction of the back-EMF and the cogging force of the optimized T-LSM with quasi- Halbach magnetized PMs has clearly demonstrated the effectiveness of the proposed approach.

  • prediction of the air gap flux density distribution of a t lsm with quasi halbach magnetized pms application to the cogging force minimization
    International Conference on Ecological Vehicles and Renewable Energies, 2015
    Co-Authors: Mohamed Wael Zouaghi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is aimed at a dual sizing-based approach to minimize the cogging force of a tubular linear synchronous Machine (T-LSM) with quasi-Halbach magnetized PMs in the mover. The study is initiated by the prediction of the spatial repartition of the no-load air gap flux density. Then, a formulation of the cogging force, based on the predicted spatial repartition of the no-load air gap flux density, is developed, considering (i) the case of an “infinite” Length Machine and (ii) the case of a finite Length one. A case study, corresponding to an initial concept, is treated with a focus on the prediction of its spatial repartition of the no-load air gap flux density and its cogging force. With this done, the study is extended to a first cogging force reduction procedure considering the case of an “infinite” Length Machine. It consists in the investigation of the effects of two influent sizing parameters on the cogging force, that enables the identification of a pre-optimized concept. The cogging force of this latter is then predicted in the case of a finite Length Machine. The study is achieved by a second cogging force reduction procedure, consisting in a quasi-cancellation of the end effect. The prediction of the cogging force of the optimized T-LSM with quasi-Halbach magnetized PMs has clearly demonstrated the effectiveness of the proposed dual sizing-based approach.

  • An approach to reduce the cogging force in tubular linear PM synchronous Machines
    2015 Tenth International Conference on Ecological Vehicles and Renewable Energies (EVER), 2015
    Co-Authors: Amal Souissi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is aimed at an approach to reduce the cogging force in tubular linear permanent magnet synchronous Machines (T-LPMSMs). An analytic prediction of the air gap flux density distribution is developed in a first step, considering the case of slottless Machine and the case where the slotting effect is taken into consideration. The established model enables, thanks to a simple formulation, the assessment of the cogging force assuming an “infinite” Length Machine. Then, the influence of the end effect on the cogging force is investigated in the case of the real Machine. The study is extended to a cogging force reduction approach devoted to a quasi-cancellation of the end effect. It consists in a two-step procedure, such that: (i) achieving a 2π/3-shift between the armature winding flux linkages by arranging the ratio of the stator pole pitch to the mover one, and (ii) balancing the amplitudes of these flux linkages by extending the stator magnetic circuit with teeth of appropriate dimensions. The cogging force prediction of the T-LPMSM following the quasi-cancellation of its end effect highlights the effectiveness of the proposed approach.

Imen Abdennadher - One of the best experts on this subject based on the ideXlab platform.

  • Analytical Prediction of the No-Load Operation Features of Tubular-Linear Permanent Magnet Synchronous Machines
    IEEE Transactions on Magnetics, 2016
    Co-Authors: Amal Souissi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    This paper is aimed at an analytical approach to predict the no-load operation features of tubular-linear permanent magnet synchronous Machines (T-LPMSMs). These are currently considered as viable candidates for wave energy conversion. The developed approach is based on the derivation of the air-gap flux density, considering both the first- and second-type modified Bessel functions of appropriate orders. Following its formulation, the air-gap flux density is applied for the prediction of the no-load operation features, with a focus on the cogging force, the phase flux linkages, and the back electromotive forces. A case study is treated considering three axial arrangements of a T-LPMSM, such as the case of an infinite Length Machine, the case of a finite Length Machine, and the case of a finite Length Machine enabling a quasi-cancellation of the end effect. A comparison between the analytically predicted features and those numerically computed by a 2-D finite-element analysis has led to good agreement.

  • No-load Features of T-LSMs With Quasi-Halbach Magnets: Application to Free Piston Engines
    IEEE Transactions on Energy Conversion, 2016
    Co-Authors: Mohamed Wael Zouaghi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is devoted to the prediction followed by the enhancement of the no-load features of tubular linear synchronous Machines (T-LSMs) with quasi- Halbach magnetized PMs in the mover. The study is initiated by the prediction of the spatial repartition of the no-load air gap flux density. Then, a formulation of the back-EMF and the cogging force, based on the predicted spatial repartition of the no-load air gap flux density, is developed, considering 1) the case of an infinite Length Machine and 2) the case of a finite Length one. A case study, corresponding to an initial concept, is treated with the prediction of its no-load features. The study is extended to the enhancement of these features with emphasis on the effects of two influent sizing parameters, assuming an infinite Length Machine. This enables the identification of a preoptimized concept. The back-EMF and the cogging force of this latter are then predicted in the case of a finite Length Machine. A further enhancement of these features is gained, thanks to a quasicancellation of the end effect. The prediction of the back-EMF and the cogging force of the optimized T-LSM with quasi- Halbach magnetized PMs has clearly demonstrated the effectiveness of the proposed approach.

  • prediction of the air gap flux density distribution of a t lsm with quasi halbach magnetized pms application to the cogging force minimization
    International Conference on Ecological Vehicles and Renewable Energies, 2015
    Co-Authors: Mohamed Wael Zouaghi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is aimed at a dual sizing-based approach to minimize the cogging force of a tubular linear synchronous Machine (T-LSM) with quasi-Halbach magnetized PMs in the mover. The study is initiated by the prediction of the spatial repartition of the no-load air gap flux density. Then, a formulation of the cogging force, based on the predicted spatial repartition of the no-load air gap flux density, is developed, considering (i) the case of an “infinite” Length Machine and (ii) the case of a finite Length one. A case study, corresponding to an initial concept, is treated with a focus on the prediction of its spatial repartition of the no-load air gap flux density and its cogging force. With this done, the study is extended to a first cogging force reduction procedure considering the case of an “infinite” Length Machine. It consists in the investigation of the effects of two influent sizing parameters on the cogging force, that enables the identification of a pre-optimized concept. The cogging force of this latter is then predicted in the case of a finite Length Machine. The study is achieved by a second cogging force reduction procedure, consisting in a quasi-cancellation of the end effect. The prediction of the cogging force of the optimized T-LSM with quasi-Halbach magnetized PMs has clearly demonstrated the effectiveness of the proposed dual sizing-based approach.

  • An approach to reduce the cogging force in tubular linear PM synchronous Machines
    2015 Tenth International Conference on Ecological Vehicles and Renewable Energies (EVER), 2015
    Co-Authors: Amal Souissi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is aimed at an approach to reduce the cogging force in tubular linear permanent magnet synchronous Machines (T-LPMSMs). An analytic prediction of the air gap flux density distribution is developed in a first step, considering the case of slottless Machine and the case where the slotting effect is taken into consideration. The established model enables, thanks to a simple formulation, the assessment of the cogging force assuming an “infinite” Length Machine. Then, the influence of the end effect on the cogging force is investigated in the case of the real Machine. The study is extended to a cogging force reduction approach devoted to a quasi-cancellation of the end effect. It consists in a two-step procedure, such that: (i) achieving a 2π/3-shift between the armature winding flux linkages by arranging the ratio of the stator pole pitch to the mover one, and (ii) balancing the amplitudes of these flux linkages by extending the stator magnetic circuit with teeth of appropriate dimensions. The cogging force prediction of the T-LPMSM following the quasi-cancellation of its end effect highlights the effectiveness of the proposed approach.

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

  • No-load Features of T-LSMs With Quasi-Halbach Magnets: Application to Free Piston Engines
    IEEE Transactions on Energy Conversion, 2016
    Co-Authors: Mohamed Wael Zouaghi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is devoted to the prediction followed by the enhancement of the no-load features of tubular linear synchronous Machines (T-LSMs) with quasi- Halbach magnetized PMs in the mover. The study is initiated by the prediction of the spatial repartition of the no-load air gap flux density. Then, a formulation of the back-EMF and the cogging force, based on the predicted spatial repartition of the no-load air gap flux density, is developed, considering 1) the case of an infinite Length Machine and 2) the case of a finite Length one. A case study, corresponding to an initial concept, is treated with the prediction of its no-load features. The study is extended to the enhancement of these features with emphasis on the effects of two influent sizing parameters, assuming an infinite Length Machine. This enables the identification of a preoptimized concept. The back-EMF and the cogging force of this latter are then predicted in the case of a finite Length Machine. A further enhancement of these features is gained, thanks to a quasicancellation of the end effect. The prediction of the back-EMF and the cogging force of the optimized T-LSM with quasi- Halbach magnetized PMs has clearly demonstrated the effectiveness of the proposed approach.

  • prediction of the air gap flux density distribution of a t lsm with quasi halbach magnetized pms application to the cogging force minimization
    International Conference on Ecological Vehicles and Renewable Energies, 2015
    Co-Authors: Mohamed Wael Zouaghi, Imen Abdennadher, Ahmed Masmoudi
    Abstract:

    The paper is aimed at a dual sizing-based approach to minimize the cogging force of a tubular linear synchronous Machine (T-LSM) with quasi-Halbach magnetized PMs in the mover. The study is initiated by the prediction of the spatial repartition of the no-load air gap flux density. Then, a formulation of the cogging force, based on the predicted spatial repartition of the no-load air gap flux density, is developed, considering (i) the case of an “infinite” Length Machine and (ii) the case of a finite Length one. A case study, corresponding to an initial concept, is treated with a focus on the prediction of its spatial repartition of the no-load air gap flux density and its cogging force. With this done, the study is extended to a first cogging force reduction procedure considering the case of an “infinite” Length Machine. It consists in the investigation of the effects of two influent sizing parameters on the cogging force, that enables the identification of a pre-optimized concept. The cogging force of this latter is then predicted in the case of a finite Length Machine. The study is achieved by a second cogging force reduction procedure, consisting in a quasi-cancellation of the end effect. The prediction of the cogging force of the optimized T-LSM with quasi-Halbach magnetized PMs has clearly demonstrated the effectiveness of the proposed dual sizing-based approach.

Jianrong Wang - One of the best experts on this subject based on the ideXlab platform.

Liangxing Shi - One of the best experts on this subject based on the ideXlab platform.