Simulation of wave propagation effects in machine windings

Gersem, Herbert De; Henze, O.; Weiland, Thomas; Binder, A.

doi:10.1108/03321641011007948

Cited by 18 publications

(13 citation statements)

References 7 publications

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“…As the displacement current density is not neglected entirely, effects of resonance can still be observed [11]. Therefore, in the context of applications in the quasi-stationary limit (1) where capacitive effects become relevant [15], the Darwin model seems to be well suited as an alternative to the full hyperbolic set of equations.…”

Section: A the Darwin Modelmentioning

confidence: 98%

Time domain methods for slowly varying fields

Koch

Weiland

2010

2010 URSI International Symposium on Electromagnetic Theory

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In a wide range of practical applications in electrical engineering, quasi-stationary approximations are applicable to the full set of the Maxwell equations. Based on the respective subsets for the specific approximation, different formulations in terms of field quantities and potentials can be derived. According to the resulting type of partial differential equation, appropriate methods for the time-integration process required for the numerical solution need to be chosen. The paper gives a short overview of existing strategies, whereas a selected method is used to simulate a complex model as an example.

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Section: A the Darwin Modelmentioning

confidence: 98%

Time domain methods for slowly varying fields

Koch

Weiland

2010

2010 URSI International Symposium on Electromagnetic Theory

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“…Next to the IIBC context, research on EMI behavior and computation of other parasitic effects, such as additional losses, has significantly motivated work on the modeling of i CM and of the HF behavior of the machine. From the myriad of papers on this topic, (Magdun et al, 2007;Mirafzal et al, 2007;Mirafzal, Skibinski, Tallam, 2009;Weens et al, 2009;De Gersem et al, 2010;Zare, 2010) might be taken as examples. Considering the scope of this paper, these findings allow to better take advantage of the modeling techniques of IIBCs themselves, by providing information on one of the most important parameters of influence, the HF CM current i CM .…”

Section: Hf CM Current and Machine Impedancementioning

confidence: 98%

Thousands of hits: on inverter-induced bearing currents, related work, and the literature

Mütze

2011

Elektrotech. Inftech.

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A. Mü tze OVE Today, a search for bearing currents in databases on engineering literature may return hundreds or (depending on the database and any additional filter used) thousands of hits. The degree to which the identified papers address the bearing current topic itself varies. Often, the term is used (as it is common with key words) to reflect the wider context and the topicality of the work that is presented, e.g. a discussion of a new filter topology. Without claiming completeness, this paper provides an overview of the various aspects that have been addressed in literature related to the bearing current topic.Tausende von Treffern: Ü ber umrichterbedingte Lagerströ me, zugehö rige Themen und die Literatur.Eine einfache Suche unter dem Stichwort "Lagerströ me in einer Datenbank fü r Ingenieursliteratur kann zu hunderten oder (abhä ngig von der Datenbank und zusä tzlich verwendeten Filtern) tausenden von Treffern fü hren. Das Ausmaß, mit dem die identifizierten Publikationen das Lagerstromthema behandeln, variiert. Oft wird der Begriff (wie es fü r Stichwö rter ü blich ist) verwendet, um den weiteren Zusammenhang und die Aktualitä t des in der jeweiligen Publikation behandelten Themas, wie z. B. eine neue Filtertopologie, widerzuspiegeln. Dieser Beitrag gibt einen Ü berblick ü ber die verschiedenen mit dem Lagerstromthema in Verbindung stehenden Aspekte, die in der Literatur behandelt werde.

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“…Presented approach gives better numerical stability of algorithm, versus this presented in [9]. Decomposition (8) allows to decouple telegraph equations in the following way:…”

Section: Transmission Line Methodsmentioning

confidence: 99%

“…The frequency of excitation current when using FRA Presented research is based on the conception presented by [9]. Each turn from …”

Section: Transmission Line Methodsmentioning

confidence: 99%

Wave Phenomena in High-Voltage Windings of Transformers

Banaszak

2014

Acta Phys. Pol. A

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Determination of mechanical condition of transformer active part can be performed utilizing frequency response of the windings. Many computing models were developed to evaluate behavior of the winding in wide frequency range using dierent numerical methods. Most of them utilizes nite elements, assuming axial symmetry, if possible.In other cases we need to use a three-dimensional model, which results in a signicant reduction in the accuracy of modeling the geometry of the system, as well as the penetration of electromagnetic eld into conductors. From a practical point of view, using computer of average performance, the windings can be modeled with at most 10 turns.From this reason mixed models are proposed, where the electric parameters of the winding are concentrated in the substitute RLC elements. Such models are known as lumped parameter models. Since the parameters of real winding are distributed, the question arises concerning the necessity of taking into account wave phenomena in them. The method allowing this is known as transmission line method. Measurements of frequency response are used in industry. There are still many problems with interpretation of test results. Computer modeling may be a helpful tool allowing to understand relation between the geometry of a winding and its frequency response. To fulll this, models should give similar response as a real measurement. The paper describes a modied transmission line method used for modeling of a transformer winding's frequency response. There is described the model, its parameters, and exemplary solution compared to test data.

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Simulation of wave propagation effects in machine windings

Cited by 18 publications

References 7 publications

Time domain methods for slowly varying fields

Time domain methods for slowly varying fields

Thousands of hits: on inverter-induced bearing currents, related work, and the literature

Wave Phenomena in High-Voltage Windings of Transformers

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