Efficient Parallel 3-D Computation of Electrical Machines With Elmer

Keränen, Janne; Pippuri, Jenni; Malinen, Mika; Ruokolainen, Juha; Råback, Peter; Lyly, Mikko; Tammi, Kari

doi:10.1109/tmag.2014.2356256

Cited by 29 publications

(12 citation statements)

References 5 publications

(3 reference statements)

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“…Elmer is an open-source FEM software package, which can solve partial differential equations for multi-physics simulations [23,28]. In Elmer, based on the Maxwell equations, the 2-D magnetic system is described as [29,30]:…”

Section: -D Finite-element Model Of Bsrmmentioning

confidence: 99%

Multi-Physics Multi-Objective Optimal Design of Bearingless Switched Reluctance Motor Based on Finite-Element Method

et al. 2019

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The bearingless switched reluctance motor (BSRM) integrates the switched reluctance motor (SRM) with the magnetic bearings, which avoids mechanical bearings-loss and makes it promising in high-speed applications. In this paper, a comprehensive framework for the multi-physics multi-objective optimal design of BSRMs based on finite-element method (FEM) is proposed. At first, the 2-D electromagnetic model of a fabricated initial design prototype is built and solved by the open-source FEM software, Elmer. The iron loss model in Elmer based on the Fourier series is modified by a transient iron loss model with less computation time. Besides, a simplified lumped-parameter (LP) thermal model of the BSRM is applied to estimate the temperature rise of BSRM in the steady state. Then, the comprehensive framework for the multi-physics multi-objective optimal design of BSRMs based on FEM is proposed. The objectives, constraints, and decision variables for optimization are determined. The multi-objective genetic particle swarm optimizer is utilized to obtain the Pareto front of optimization. The electromagnetic performance of the final optimal design is compared with the initial design. Comparison results show that the average electromagnetic torque and the efficiency are significantly enhanced.

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Section: -D Finite-element Model Of Bsrmmentioning

confidence: 99%

Multi-Physics Multi-Objective Optimal Design of Bearingless Switched Reluctance Motor Based on Finite-Element Method

et al. 2019

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“…Several formulations for 3-D electromagnetic modelling are summarized in [6]. In this paper, the AV-A formulation is used for the 3-D simulation with open source FEM software ELMER which is also applied in [7,8]. The formulation can be derived by means of a magnetic vector potential A (B = ∇×A) and an electric scalar potential…”

Section: A Electromagnetic Analysismentioning

confidence: 99%

Simulation of an Induction Motor’s Rotor After Connection

et al. 2017

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Transients have proven to be a specially demanding operation mode for rotor cages in induction motors. The combination of thermal and mechanical stresses causes damage in weak points of the secondary circuit of these machines. A 3D multiphysics computation may shed some light into the conditions under faults such as broken bars develop whilst taking into account phenomena as interbar currents. With the aim of reducing the computational cost involved, this work carries out a 3D simulation of just the rotor during the first 2.5 cycles after a direct-on-line connection, being the tangential component of the magnetic vector potential mapped on its iron surface from the results obtained by 2D locked rotor FE simulation. The results provide an insight into the skin effect and mechanical loads in the cage, a magnetic coupling between the end ring and the shaft as well as the limitations of the weakly coupled magnetoelastic analysis.

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“…Nevertheless, the computation time of FEM within control loop is far longer than simulating with a state space model, because of the large sparse system of equations. There is an obvious solution to this problem, namely the parallelization of finite element method [6], [7], [11], [12], [13] in order to speed-up the computations. One of the possibilities is the Domain Decomposition Method (DDM) [6], [7], [13], [14], [15], [16], [17].…”

Section: Fig 1 Block Diagram Of the Switched Reluctance Drive Systemmentioning

confidence: 99%

Finite element analysis of switched reluctance motor with rotor position based control

Marcsa¹,

Kuczmann²

2016

Pollack Periodica

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This research presents a field-circuit coupled parallel finite element model of a switched reluctance motor embedded in a simple closed loop control system. The parallel numerical model is based on the Schur-complement method coupled with an iterative solver. The used control system is the rotor position based control, which is applied to the FEM model. The results and parallel performance of the voltage driven finite element model are compared with the results from the current driven model. Moreover, the results of the start-up of the loaded motor show why the model accuracy is important in the control loop.

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Efficient Parallel 3-D Computation of Electrical Machines With Elmer

Cited by 29 publications

References 5 publications

Multi-Physics Multi-Objective Optimal Design of Bearingless Switched Reluctance Motor Based on Finite-Element Method

Multi-Physics Multi-Objective Optimal Design of Bearingless Switched Reluctance Motor Based on Finite-Element Method

Simulation of an Induction Motor’s Rotor After Connection

Finite element analysis of switched reluctance motor with rotor position based control

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