A contribution to the modeling of three phase transformers using reluctances

Elleuch, M.; Poloujadoff, M.

doi:10.1109/20.486517

Cited by 53 publications

(28 citation statements)

References 37 publications

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“…The equation (6) indicate that the material has different saturation level along the radius direction, and it is not possible to extract an explicit equivalent length directly as done in (4).…”

Section: Discussionmentioning

confidence: 99%

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Permeance based modelling of the core corners considering magnetic material nonlinearity

Luo

Dujić

2015

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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Abstract-Lumped magnetic circuit provides possibility for fast transient simulation of magnetic component together with power electronics circuit. The simplified geometry representation however is not able to completely reflect the real field distribution, especially when material nonlinearity is included. To model electrical characteristic of the magnetic components closer to the reality, special treatment is needed to determine geometrical parameters of the lumped representation. In this paper, modeling of the curved areas (e.g. core corners) based on permeances is presented and compared with FEM simulations.

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Section: Discussionmentioning

confidence: 99%

“…These three parameters will be transformed into a reluctance or permeance value during simulation, as shown in [6] for a three leg transformer core. In this case, unique cross-section area and magnetic path length was assigned to both corner and straight limb of one core leg.…”

Section: Introductionmentioning

confidence: 99%

Permeance based modelling of the core corners considering magnetic material nonlinearity

Luo

Dujić

2015

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

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“…The use of analog and, next, digital machines for solving thermal networks enabled significant increase in the number of nodes [4][5][6][7][8][9][10][11][12]. When creating these models the simplifi-R. Krok cation was used which relies on assuming that the temperature distribution in streams of the cooling media flowing in ducts was linear along their length.…”

Section: Thermal Network In Calculations Of the Temperature Distribumentioning

confidence: 99%

Electric mine motor thermal models aiding design and setting thermal protections

Krok¹

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The paper presents original modified thermal networks for calculations of the temperature field in induction mine motors under steady and transient conditions aiding design and setting thermal protections. They can be used for location of the hottest places in motor elements in order to place in them sensors for temperature measurements. They can be also applied to determining the equivalent thermal constants of windings needed when setting microprocessor thermal protections.

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“…Most of the approaches are based on the electrical equivalent circuit [5,[7][8][9] or magnetic equivalent circuit [10][11][12][13]. The sympathetic inrush current has also been analyzed in a few references [14][15][16].…”

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confidence: 99%

Analysis of Sympathetic Inrush Phenomena in Transformers Using Coupled Field-Circuit Approach

Kumbhar

Kulkarni

2007

2007 IEEE Power Engineering Society General Meeting

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Abstract-Sympathetic inrush current phenomenon occurs when a transformer is switched on in a power system network containing other transformers which are already energized. In this paper, the phenomenon of sympathetic inrush current is investigated using nonlinear-transient field-circuit coupled finite element formulation. The cases of the transformers connected in parallel and in series have been considered. The results obtained for a 31.5 MVA, three-phase transformer are presented and discussed in detail. This work also includes the investigation of parameters affecting the magnitude and duration of sympathetic inrush phenomenon, such as series resistance, switching-on angle, residual flux density and load conditions. These analyses provide a sound theoretical basis for a thorough understanding of the phenomenon.Index Terms-Sympathetic inrush phenomenon, finite element method, field-circuit coupling, nonlinear transient.

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A contribution to the modeling of three phase transformers using reluctances

Cited by 53 publications

References 37 publications

Permeance based modelling of the core corners considering magnetic material nonlinearity

Permeance based modelling of the core corners considering magnetic material nonlinearity

Electric mine motor thermal models aiding design and setting thermal protections

Analysis of Sympathetic Inrush Phenomena in Transformers Using Coupled Field-Circuit Approach

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