The Experts below are selected from a list of 2037 Experts worldwide ranked by ideXlab platform

Pablo Sanchezpuertas - One of the best experts on this subject based on the ideXlab platform.

  • pseudoscalar Pole contribution to the g_ mu 2 a rational approach
    Physical Review D, 2017
    Co-Authors: Pere Masjuan, Pablo Sanchezpuertas
    Abstract:

    We employ a mathematical framework based on rational approximants in order to calculate the pseudoscalar-Pole Piece of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon, $a_{\mu}^{\textrm{HLbL};P}$. The method is systematic and data based, profiting from over 13 different collaborations, and able to ascribe, for the first time, a systematic uncertainty which provides for the model independence. As a result, we obtain $a_{\mu}^{\textrm{HLbL};P}=94.3(5.3) \times10^{-11}$, which uncertainty is well below the one foreseen at future experiments measuring the $(g_{\mu}-2)$.

  • pseudoscalar Pole contribution to the g μ 2 a rational approach
    Physical Review D, 2017
    Co-Authors: Pere Masjuan, Pablo Sanchezpuertas
    Abstract:

    We employ a mathematical framework based on rational approximants in order to calculate the pseudoscalar-Pole Piece of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon, ${a}_{\ensuremath{\mu}}^{\mathrm{HLbL};P}$. The method is systematic and data based, profiting from over 13 different collaborations, and able to ascribe, for the first time, a systematic uncertainty which provides for the model independence. As a result, we obtain ${a}_{\ensuremath{\mu}}^{\mathrm{HLbL};P}=94.3(5.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}11}$, whose uncertainty is well below the one foreseen at future experiments measuring the $({g}_{\ensuremath{\mu}}\ensuremath{-}2)$.

Desmedt Michiel - One of the best experts on this subject based on the ideXlab platform.

  • Electromechanical dynamics analysis of Pole-Piece rotors in pseudo direct-drive wind turbine generators
    'Institute of Electrical and Electronics Engineers (IEEE)', 2020
    Co-Authors: Desmedt Michiel, Dong J., Wani F.m., Bauer P., Polinder H.
    Abstract:

    This paper analyses the electromechanical dynamics of the Pole-Piece rotors in a pseudo direct-drive wind turbine generator. The investigated generator has a rated power of 10 MW and was designed in the INNWIND.EU project. One way coupled finite element analysis (FEA) was used to calculate the rotor dynamic defections caused by electromagnetic forces in the air gap. Results show that the deflection exceeds the air gap length which is not mechanically feasible. To solve the problem, three structural modifications are proposed and tested in FEA to reduce the Pole Piece deflection significantly. The results of the three solutions are compared to idenfity the most promising one. It shows that a ribbed rotor Piece topology is the most suitable option because it achieves a reasonable tradeoff between the torque generation and mechanical deflection.

  • Electromechanical dynamics analysis of Pole-Piece rotors in pseudo direct-drive wind turbine generators
    'Institute of Electrical and Electronics Engineers (IEEE)', 2020
    Co-Authors: Desmedt Michiel, Dong J., Wani F.m., Bauer P., Polinder H.
    Abstract:

    This paper analyses the electromechanical dynamics of the Pole-Piece rotors in a pseudo direct-drive wind turbine generator. The investigated generator has a rated power of 10 MW and was designed in the INNWIND.EU project. One way coupled finite element analysis (FEA) was used to calculate the rotor dynamic defections caused by electromagnetic forces in the air gap. Results show that the deflection exceeds the air gap length which is not mechanically feasible. To solve the problem, three structural modifications are proposed and tested in FEA to reduce the Pole Piece deflection significantly. The results of the three solutions are compared to idenfity the most promising one. It shows that a ribbed rotor Piece topology is the most suitable option because it achieves a reasonable tradeoff between the torque generation and mechanical deflection.DC systems, Energy conversion & StorageTransport Engineering and Logistic

  • Electromechanical dynamics analysis of Pole-Piece rotors in pseudo direct-drive wind turbine generators
    'Institute of Electrical and Electronics Engineers (IEEE)', 2020
    Co-Authors: Desmedt Michiel, Dong J., Wani F.m., Bauer P., Polinder H.
    Abstract:

    This paper analyses the electromechanical dynamics of the Pole-Piece rotors in a pseudo direct-drive wind turbine generator. The investigated generator has a rated power of 10 MW and was designed in the INNWIND.EU project. One way coupled finite element analysis (FEA) was used to calculate the rotor dynamic defections caused by electromagnetic forces in the air gap. Results show that the deflection exceeds the air gap length which is not mechanically feasible. To solve the problem, three structural modifications are proposed and tested in FEA to reduce the Pole Piece deflection significantly. The results of the three solutions are compared to idenfity the most promising one. It shows that a ribbed rotor Piece topology is the most suitable option because it achieves a reasonable tradeoff between the torque generation and mechanical deflection.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.DC systems, Energy conversion & StorageTransport Engineering and Logistic

  • Dynamical electromechanical analysis of Pole-Piece rotors in pseudo direct-drive machines
    'Norwegian University of Science and Technology (NTNU) Library', 2019
    Co-Authors: Desmedt Michiel
    Abstract:

    Wind energy has shown to be a great renewable energy source, with a possible penetration of 20% by 2040. In order to increase its competitiveness with fossil fuels, the LCOE should decrease further than it already has. Increasing the power rating of wind turbines has proven to be an effective way to achieve this. However, this results in impractical large nacelles which are hard to install offshore. Reducing the size can be done with a gearbox, but due to the gearbox being a high-risk component of offshore wind turbines, wind turbine manufacturers have moved to direct-drive topologies. The pseudo direct-drive topology, where a magnetic gear and direct-drive machine are combined, has shown great potential reducing the size of the generator while keeping the reliability of a direct-drive machine. However, due to the introduction of an extra rotor for the magnetic gearing, the mechanical complexity increases. Focusing on a particular 10 MW design, large deflections in this extra rotor of up to five times the air gap length have been observed during nominal operation. Simple modifications have been investigated, resulting in deflections of less than 1 mm. Each modification was then compared to identify the most promising one

  • Dynamical electromechanical analysis of Pole-Piece rotors in pseudo direct-drive machines: Taking the next step towards tomorrow’s wind turbines
    2019
    Co-Authors: Desmedt Michiel
    Abstract:

    Wind energy has shown to be a great renewable energy source, with a possible penetration of 20 % by 2040. In order to increase its competitiveness with fossil fuels, the LCOE should decrease further than it already has. Increasing the power rating of wind turbines has proven to be an effective way to achieve this. However, this results in impractical large nacelles which are hard to install offshore. Reducing the size can be done with a gearbox, but due to the gearbox being a high-risk component of offshore wind turbines, wind turbine manufacturers have moved to direct-drive topologies. The pseudo direct-drive topology, where a magnetic gear and direct-drive machine are combined, has shown great potential reducing the size of the generator while keeping the reliability of a direct-drive machine. However, due to the introduction of an extra rotor for the magnetic gearing, the mechanical complexity increases. Focusing on a particular 10 MW design, large deflections in this extra rotor of up to five times the air gap length have been observed during nominal operation. Simple modifications have been investigated, resulting in deflections of less than 1 mm. Each modification was then compared to identify the most promising one.European Wind Energy Masters (EWEM

Pere Masjuan - One of the best experts on this subject based on the ideXlab platform.

  • pseudoscalar Pole contribution to the g_ mu 2 a rational approach
    Physical Review D, 2017
    Co-Authors: Pere Masjuan, Pablo Sanchezpuertas
    Abstract:

    We employ a mathematical framework based on rational approximants in order to calculate the pseudoscalar-Pole Piece of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon, $a_{\mu}^{\textrm{HLbL};P}$. The method is systematic and data based, profiting from over 13 different collaborations, and able to ascribe, for the first time, a systematic uncertainty which provides for the model independence. As a result, we obtain $a_{\mu}^{\textrm{HLbL};P}=94.3(5.3) \times10^{-11}$, which uncertainty is well below the one foreseen at future experiments measuring the $(g_{\mu}-2)$.

  • pseudoscalar Pole contribution to the g μ 2 a rational approach
    Physical Review D, 2017
    Co-Authors: Pere Masjuan, Pablo Sanchezpuertas
    Abstract:

    We employ a mathematical framework based on rational approximants in order to calculate the pseudoscalar-Pole Piece of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon, ${a}_{\ensuremath{\mu}}^{\mathrm{HLbL};P}$. The method is systematic and data based, profiting from over 13 different collaborations, and able to ascribe, for the first time, a systematic uncertainty which provides for the model independence. As a result, we obtain ${a}_{\ensuremath{\mu}}^{\mathrm{HLbL};P}=94.3(5.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}11}$, whose uncertainty is well below the one foreseen at future experiments measuring the $({g}_{\ensuremath{\mu}}\ensuremath{-}2)$.

Mohd Firdaus Mohd Ab Halim - One of the best experts on this subject based on the ideXlab platform.

  • torque density design optimization of rotating Pole Piece concentric magnetic gear
    Arabian Journal for Science and Engineering, 2021
    Co-Authors: Mohd Firdaus Mohd Ab Halim, R N F K R Othman, Erwan Sulaiman, R Aziz, A A Rahman
    Abstract:

    Concentric magnetic gear (CMG) can achieve a torque density of more than 150 kN m/m3 through several modifications of the original structure and the removal of material volume. However, the complexity of such a system may be impractical to assemble and realize. CMG with an alternative condition where the Pole Piece acts as the outer rotor can deliver higher torque instead of outer Pole pair on the same structure. This unconventional condition was known since CMG inception, but it inherits the problem similar to the reluctance machine of high torque ripple. In this paper, a considerably high torque density rotating Pole Piece magnetic gear is proposed. Several Pole pair combinations were evaluated that could yield the highest torque density at lower torque ripple. The best Pole pair combination was then optimized through the width reduction of three elements, namely the Pole Piece, the inner yoke and the outer yoke. By enhancing the structure with the best Pole pair combination, the highest torque density achieved was 364.5 kNm/m3. At the same time, the torque ripple was ably kept at below 15%. Unlike other complex structures that yield high torque density, the proposed structure is simpler, easier to assemble and hence should be more cost effective to be produced.

  • flux modulated rotating Pole Piece magnetic gear
    International Journal of Power Electronics and Drive Systems (IJPEDS), 2020
    Co-Authors: Mohd Firdaus Mohd Ab Halim
    Abstract:

    In this paper, the CMG is re-condition so that the Pole Piece act as the outer rotor instead of surface mount PM. This magnetic coupling of the CMG is similar to the conventional CMG which uses harmonic to transfer the torque and speed from the inner rotor to the outer rotor. The working principle of the proposed CMG is derived analytically and simulated using finite element software. For this recondition, the PM at the outer section become stationary hence, retaining sleeve can be remove. The proposed MG produced 18% higher average torque than the conventional MG with drawback in torque ripple. The proposed CMG also produce higher gear ratio than the same Pole pair of conventional CMG.

  • flux modulated rotating Pole Piece magnetic gear
    International Journal of Power Electronics and Drive Systems (IJPEDS), 2020
    Co-Authors: Mohd Firdaus Mohd Ab Halim, Erwan Bin Sulaiman, R N F K R Othman
    Abstract:

    In this paper, the CMG is re-condition so that the Pole Piece act as the outer rotor instead of surface mount PM. This magnetic coupling of the CMG is similar to the conventional CMG which uses harmonic to transfer the torque and speed from the inner rotor to the outer rotor. The working principle of the proposed CMG is derived analytically and simulated using finite element software. For this recondition, the PM at the outer section become stationary hence, retaining sleeve can be removing. The proposed MG produced 18% higher average torque than the conventional MG with drawback in torque ripple. The proposed CMG also produce higher gear ratio than the same Pole pair of conventional CMG.

Polinder H. - One of the best experts on this subject based on the ideXlab platform.

  • Electromechanical dynamics analysis of Pole-Piece rotors in pseudo direct-drive wind turbine generators
    'Institute of Electrical and Electronics Engineers (IEEE)', 2020
    Co-Authors: Desmedt Michiel, Dong J., Wani F.m., Bauer P., Polinder H.
    Abstract:

    This paper analyses the electromechanical dynamics of the Pole-Piece rotors in a pseudo direct-drive wind turbine generator. The investigated generator has a rated power of 10 MW and was designed in the INNWIND.EU project. One way coupled finite element analysis (FEA) was used to calculate the rotor dynamic defections caused by electromagnetic forces in the air gap. Results show that the deflection exceeds the air gap length which is not mechanically feasible. To solve the problem, three structural modifications are proposed and tested in FEA to reduce the Pole Piece deflection significantly. The results of the three solutions are compared to idenfity the most promising one. It shows that a ribbed rotor Piece topology is the most suitable option because it achieves a reasonable tradeoff between the torque generation and mechanical deflection.

  • Electromechanical dynamics analysis of Pole-Piece rotors in pseudo direct-drive wind turbine generators
    'Institute of Electrical and Electronics Engineers (IEEE)', 2020
    Co-Authors: Desmedt Michiel, Dong J., Wani F.m., Bauer P., Polinder H.
    Abstract:

    This paper analyses the electromechanical dynamics of the Pole-Piece rotors in a pseudo direct-drive wind turbine generator. The investigated generator has a rated power of 10 MW and was designed in the INNWIND.EU project. One way coupled finite element analysis (FEA) was used to calculate the rotor dynamic defections caused by electromagnetic forces in the air gap. Results show that the deflection exceeds the air gap length which is not mechanically feasible. To solve the problem, three structural modifications are proposed and tested in FEA to reduce the Pole Piece deflection significantly. The results of the three solutions are compared to idenfity the most promising one. It shows that a ribbed rotor Piece topology is the most suitable option because it achieves a reasonable tradeoff between the torque generation and mechanical deflection.DC systems, Energy conversion & StorageTransport Engineering and Logistic

  • Electromechanical dynamics analysis of Pole-Piece rotors in pseudo direct-drive wind turbine generators
    'Institute of Electrical and Electronics Engineers (IEEE)', 2020
    Co-Authors: Desmedt Michiel, Dong J., Wani F.m., Bauer P., Polinder H.
    Abstract:

    This paper analyses the electromechanical dynamics of the Pole-Piece rotors in a pseudo direct-drive wind turbine generator. The investigated generator has a rated power of 10 MW and was designed in the INNWIND.EU project. One way coupled finite element analysis (FEA) was used to calculate the rotor dynamic defections caused by electromagnetic forces in the air gap. Results show that the deflection exceeds the air gap length which is not mechanically feasible. To solve the problem, three structural modifications are proposed and tested in FEA to reduce the Pole Piece deflection significantly. The results of the three solutions are compared to idenfity the most promising one. It shows that a ribbed rotor Piece topology is the most suitable option because it achieves a reasonable tradeoff between the torque generation and mechanical deflection.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.DC systems, Energy conversion & StorageTransport Engineering and Logistic

  • Magnet and device for magnetic density separation
    European Patent Office, 2014
    Co-Authors: Polinder H., Rem P.c.
    Abstract:

    A planar magnet for magnetic density separation, comprising an array of Pole Pieces succeeding in longitudinal direction of a mounting plane, each Pole Piece having a body extending transversely along the mounting plane with a substantially constant cross section that includes a top segment that is curved to distribute the magnetic field associated with the top surface of the Pole Piece such that its strength transverse to the mounting plane is substantially uniformly distributed in planes parallel to the mounting plane, the curved top segments having a width (w) in longitudinal direction of the mounting plane and a maximum height (h) transverse to the mounting plane, wherein the top segments of successive Pole Pieces are unequal in height and/or width.Electrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc