A general method for the frequency domain FE modeling of rotating electromagnetic devices

Gyselinck, Johan; Vandevelde, Lieven; Dular, Patrick; Geuzaine, Christophe; Legros, W.

doi:10.1109/tmag.2003.810381

Cited by 20 publications

(7 citation statements)

References 5 publications

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“…The rotor saliency, along with the rotor slots and rotor currents, induce additional time frequencies into the stator fields [23]. The multi-harmonic FEA [24], in which several frequencies are considered rather than a single frequency, may give promising results, although with increased computation cost. The following approach utilizes single-frequency time-harmonic FEA because it can easily be implemented and because it minimizes the computational burden.…”

Section: Fe-aided Steady State Torque Approximationmentioning

confidence: 99%

FE-Aided Synchronization Analysis of Line-Start Synchronous Reluctance Motors

et al. 2021

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Since line-start synchronous permanent magnet motors (LSPMs) entered the market, they have attracted research interest toward counterpart induction motors of low power-ratings. This paper reports an investigation of line-start synchronous reluctance motors (LS-SynRMs). LS-SynRMs has not been investigated as much as LSPMs have. A motor needs to maximize rotor saliency to achieve high efficiency and a high power-factor. This results in complicated rotor geometry because the rotor cage and multiple flux barriers share the same rotor space. This paper provides an approximate method based on steady state torque analysis by which to estimate the critical inertia of a LS-SynRM. A finite element analysis (FEA)-aided analytical approach to the approximation of steady state torque is proposed to replace the more typical approach based on equivalent circuit parameters. The critical inertia resulting from the proposed method is compared to the results obtained using the FEA.

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Section: Fe-aided Steady State Torque Approximationmentioning

confidence: 99%

FE-Aided Synchronization Analysis of Line-Start Synchronous Reluctance Motors

et al. 2021

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“…The contributions of the elements of Ω mb read, e.g. for i ∈Ω st and j ∈Ω rt ,Equation 15Since the relation between the coordinate systems ( x , y ) and ( x ′, y ′) and the overlap of the supports of two spatial FE shape functions α i ( x , y ) and α j ( x ′, y ′) depend on the velocity and time, the contributions of elements of Ω mb to the stiffness matrix result in a full coupling between all harmonics (Gyselinck et al , 2003). The combined system of equations is:Equation 16…”

Section: Moving‐band Techniquementioning

confidence: 99%

Comparison of sliding‐surface and moving‐band techniques in frequency‐domain finite‐element models of rotating machines

Gersem

Gyselinck²,

Dular

et al. 2004

COMPEL

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The sliding‐surface and moving‐band techniques are introduced in frequency‐domain finite element formulations to model the solid‐body motion of the rotors in an cylindrical machine. Both techniques are compared concerning their feasibility and computational efficiency. A frequency‐domain model of a capacitor motor is equipped with a sliding surface and compared to a transient model with moving band. This example illustrates the advantages of frequency‐domain simulation over transient simulation for the simulation of steady‐state working conditions of electrical machines.

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“…The working principles of electromagnetic devices rely on magnetic/electric and electric/magnetic energy conversions [1]. A large amount of energy is converted in applications, including power transformers, quasi-static converters and electric motors.…”

Section: -Introductionmentioning

confidence: 99%

Anomalous fractional magnetic field diffusion through cross-section of a massive toroidal ferromagnetic core

Ducharne

Tsafack

Deffo

et al. 2021

Communications in Nonlinear Science and Numerical Simulation

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Toroidal massive ferromagnetic cores are used in a wide range of electromagnetic applications, such as current sensors, inductances, static converters and filters. Growing interest exists in the industrial field with regards simulation tools to reduce experimental campaigns and improve product knowledge and performance. Accurate simulation results require a consideration of precise electromagnetic laws, such as the exact non-linear magnetic behavior of toroidal magnetic cores. Under the influence of an external surface magnetic field that was created by a surrounding coil, the local magnetic state through a ferromagnetic core cross-section was ruled by a combination of magnetic domain kinetics and external magnetic field diffusion. Conventional methods to simulate magnetic behavior are based on a separation of magnetic contributions, where microscopic Eddy currents from domain wall motions and macroscopic currents from external magnetic field variations are considered separately. This separation is artificial, because both loss mechanisms occur simultaneously and interact. In this study, an alternative solution was proposed through the resolution of a two-dimensional anomalous fractional magnetic field diffusion. The fractional order constitutes an additional degree of freedom in the simulation scheme, which can be identified by comparison with the experimental results. By adjusting this order, accurate local and global simulation results can be obtained on a broad frequency bandwidth and allow for the precise prediction of the dynamic magnetic behavior of a toroidal massive magnetic core.

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A general method for the frequency domain FE modeling of rotating electromagnetic devices

Cited by 20 publications

References 5 publications

FE-Aided Synchronization Analysis of Line-Start Synchronous Reluctance Motors

FE-Aided Synchronization Analysis of Line-Start Synchronous Reluctance Motors

Comparison of sliding‐surface and moving‐band techniques in frequency‐domain finite‐element models of rotating machines

Anomalous fractional magnetic field diffusion through cross-section of a massive toroidal ferromagnetic core

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