Transmission-line modelling of wave propagation effects in machine windings

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

doi:10.1109/epepemc.2008.4635621

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…Gersem et al . [73] proposed a low‐mesh resolution HF approximation finite‐element stator winding machine model. To reduce computational requirement and mesh resolution while getting accurate results, approximations were made where the conductors are assumed to act like flux barriers at HF.…”

Section: Hf Machine Modelsmentioning

confidence: 99%

Electric drive systems with long feeder cables

Xie

Vakil

Gerada

2019

IET Electric Power Applications

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Electric drive systems with long feeder cables connecting inverter and machine are used for oil exploration, mining, remote operated vehicles, industrial, and aerospace applications. Though this topology has the advantage of providing a better operating environment and easier serviceability for the inverter if the machine is located in an inhospitable and inaccessible environment, it does come with its own drawbacks. Steep-fronted switched voltages and cable-machine surge impedance mismatch can lead to high-amplitude, high-frequency (HF) voltage oscillations along the feeder cable, at the machine terminals, and throughout the machine's stator windings. These effects can cause high-electromagnetic interference, corona discharge, insulation failure in the feeder cable and machine's stator windings, common-mode, differential-mode, and bearing currents. This study discusses the HF issues relating to electric drive systems with long cable feeders. HF models for feeder cable and machine to analyse these phenomena are presented. The effects on long feeder cable loading on inverter switching characteristics are discussed. Methods to mitigate high-amplitude and HF oscillations in such systems are shown.

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Section: Hf Machine Modelsmentioning

confidence: 99%

Electric drive systems with long feeder cables

Xie

Vakil

Gerada

2019

IET Electric Power Applications

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“…Numerous works focus on electrical machines windings modeling methods. The most used ones are based on the transmission line theory [2]- [4], the finite element (FE) method [5]- [7] and lumped parameter equivalent circuits [8]- [10]. The use of the transmission line theory is related to the wavelength at the frequency of the modeled phenomena.…”

Section: Introductionmentioning

confidence: 99%

Determination of Winding Lumped Parameter Equivalent Circuit by Means of Finite Element Method

et al. 2017

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In this paper, the finite element method is used in order to determine electrical parameters of a machine winding lumped element model. Thanks to this model, it will be possible to determine the electrical behavior of electrical machine winding fed by a power converter and thus to study the distribution of the turn-to-turn maximum voltage stress as early as the design process. The suitability of the method is validated by comparison with measurements.

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“…When a relatively long cable is applied between the power converter and the electrical machine, overvoltages turn up and may cause damage to the windings (Binder, 1994; Kaufhold et al , 2000). Numerical models of this phenomenon are typically based on transmission‐line models (TLMs) of the cable (Skibinski et al , 1998; Bolsens et al , 2003) and the machine windings (Henze et al , 2008; De Gersem et al , 2008). The parameters of the TLMs are basis on analytical formulae or obtained from field models.…”

Section: Introductionmentioning

confidence: 99%

Simulation of wave propagation effects in machine windings

Gersem

Henze²,

Weiland³

et al. 2010

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

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PurposeThe purpose of this paper is to offer a simulation method for predicting the impedance of machine windings at higher frequencies.Design/methodology/approachA transmission‐line model (TLM) is developed based on parameters calculated on the basis of electroquasistatic and magnetoquasistatic finite‐element (FE) model of the winding cross‐section.FindingsThe FE formulations for the low‐ and high‐frequency limits give acceptable results for the respective frequency ranges. An eddy‐current formulation is only accurate on a broader region when the FE mesh is sufficiently fine to resolve the skin depth.Research limitations/implicationsThe paper is restricted to frequency‐domain simulations.Practical implicationsThe results of the paper improve the understanding of higher‐frequency parasitic effects in electrical drives with long windings.Originality/valueThe paper shows the limitations of the FE methods used for determining the parameters of the TLMs and remedies to avoid these.

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Transmission-line modelling of wave propagation effects in machine windings

Cited by 7 publications

References 10 publications

Electric drive systems with long feeder cables

Electric drive systems with long feeder cables

Determination of Winding Lumped Parameter Equivalent Circuit by Means of Finite Element Method

Simulation of wave propagation effects in machine windings

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