Numerical models for rotor cage induction machines using finite element method

Boualem, Benali; Piriou, F.

doi:10.1109/20.717751

Cited by 24 publications

(9 citation statements)

References 9 publications

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“…In the remeshing approach [36], a new discretization mesh with a possibly new number of nodes has to be generated whenever the device components change their positions. Whereas in the sliding mesh approach [13], which is particularly popular for handling rotational movement, the unknown variables that are located on the interfaces between the moving objects are permutated upon components rotation. Finally, in the coupled boundary elements finite elements method BEM-FEM, a group of boundary matrices have to be recalculated whenever the device components change their positions.…”

Section: Updating the Electromagnetic Field Equations According To Thmentioning

confidence: 99%

Model-Order Reduction of Moving Nonlinear Electromagnetic Devices

et al. 2008

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This dissertation delivers a contribution to the field of order reduction of large-scale nonlinear models of electromagnetic devices. In particular, it enables applying model order reduction techniques to an important class of electromagnetic devices that contain moving components and materials with nonlinear magnetic properties. Such devices include among others rotating electrical machines, electromagnetic valves, electromagnetic solenoids, and electromechanical relays.The presented methods exploits the trajectory piecewise linear (TPWL) approach in approximating the nonlinear dependency of materials properties on the applied magnetic field. Additionally, the model nonlinearity that is caused by the movement of the device components is handled using a novel approach that updates the electromagnetic (EM) field model permanently according to the new components positions.The order of the large-scale electromagnetic field model is reduced by approximating the original electromagnetic field distribution by a linear combination of few virtual field distributions that are found using the proper orthogonal decomposition (POD) approach.The challenge of selecting the number and the position of the linearization points in the TPWL model is tackled using a new approach that considers the change in the magnetic properties of the device materials among all the simulated state-vectors.The new presented methods are extended to enable generating parametric reduced order models of moving nonlinear EM devices. Such models enable a fast and accurate prediction of the behavior of the EM device and its variations that result from changing the values of its design parameters. Additionally, several algorithms for generating an optimal reduction subspace of the parametric model are presented and compared.Finally, an approach for overcoming the challenge of generating reduced order models of EM devices while considering the strong influence of their power electronics driving circuits is introduced and applied to the example of a rotating electrical machine coupled to a power electronics driving circuit.The new methods presented in this work are validated by applying them on the examples of three industrial devices. An electrical transformer, an electromagnetic valve, and a rotating electrical machine. DEDICATIONTo my parents, my wife, and my daughter. ACKNOWLEDGMENTS

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Section: Updating the Electromagnetic Field Equations According To Thmentioning

confidence: 99%

Model-Order Reduction of Moving Nonlinear Electromagnetic Devices

et al. 2008

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“…Most of the induction motors in practice have skewed rotor bars because their use implies a number of advantages (apart from elimination of stator and rotor locking) such as reductions in asynchronous torque harmonics, oscillating torques, stray load losses, etc. To model these skewed slot rotor bars, normally a complicated 3D approach is required (Boualem and Piriou, 1998;Kometani et al, 2000). Owing to the reduction in the complexity of computation, it is highly desirable that a 2D approach should be extended to study the motor with skewed rotor bars.…”

Section: Rotating Machinesmentioning

confidence: 99%

Applications of coupled field formulations to electrical machinery

Kumbhar

Kulkarni

Escarela‐Perez

et al. 2007

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -This paper aims to give a perspective about the variety of techniques which are available and are being further developed in the area of coupled field formulations, with selective bibliography and practical examples, to help postgraduate students, researchers and designers working in design or analysis of electrical machinery. Design/methodology/approach -This paper reviews the recent trends in coupled field formulations. The use of these formulations for designing and non-destructive testing of electrical machinery is described, followed by their classifications, solutions and applications. Their advantages and shortcomings are discussed. Findings -The paper gives an overview of research, development and applications of coupled field formulations for electrical machinery based on more than 160 references. All landmark papers are classified. Practical engineering case studies are given which illustrate wide applicability of coupled field formulations. Research limitations/implications -Problems which continue to pose challenges to researchers are enumerated and the advantages of using the coupled-field formulation are pointed out. Practical implications -This paper gives a detailed description of the application of the coupled field formulation method to the analysis of problems that are present in different electrical machines. Examples of analysis of generators and transformers with this formulation are presented. The application examples give guidelines for its use in other analyses. Originality/value -The coupled-field formulation is used in the analysis of rotational machines and transformers where reference data are available and comparisons with other methods are performed and the advantages are justified. This paper serves as a guide for the ongoing research on coupled problems in electrical machinery.

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“…Furthermore, the modelling of a movement requires either remeshing or ad-hoc techniques. Without being exhaustive, it is worth mentioning: the hybrid finite-element boundary-element (FE-BE) approaches [1], the sliding mesh techniques (rotating machines) [2] or the mortar FE approaches [3].…”

Section: Introductionmentioning

confidence: 99%

POD-Based Reduced-Order Model of an Eddy-Current Levitation Problem

Hasan

Montier

Henneron

et al. 2018

Scientific Computing in Electrical Engineering

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The accurate and efficient treatment of eddy-current problems with movement is still a challenge. Very few works applying reduced-order models are available in the literature. In this paper, we propose a proper-orthogonal-decomposition reduced-order model to handle these kind of motional problems. A classical magnetodynamic finite element formulation based on the magnetic vector potential is used as reference and to build up the reduced models. Two approaches are proposed. The TEAM workshop problem 28 is chosen as a test case for validation. Results are compared in terms of accuracy and computational cost.

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Numerical models for rotor cage induction machines using finite element method

Cited by 24 publications

References 9 publications

Model-Order Reduction of Moving Nonlinear Electromagnetic Devices

Model-Order Reduction of Moving Nonlinear Electromagnetic Devices

Applications of coupled field formulations to electrical machinery

POD-Based Reduced-Order Model of an Eddy-Current Levitation Problem

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