Common-Mode Impedance Prediction of a High Frequency Hairpin Stator Winding Based on FEM and Modified Nodal Analysis

Behrendt, Cara-Nastasja; Dittmann, Jochen; Knebusch, Benjamin; Ponick, Bernd

doi:10.1109/speedam53979.2022.9841953

Cited by 14 publications

(3 citation statements)

References 17 publications

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“…With reference to the winding plan as presented in Fig. 2, it is possible to set up the multi-conductor transmission line model as explained in [16], which results in the linear equation system…”

Section: High Frequency Behaviour Of Electrical Machinesmentioning

confidence: 99%

Design of hairpin windings considering the transient potential distribution

Dittmann

England

Ponick

2023

Elektrotech. Inftech.

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With the increasing use of novel semiconductor technologies such as SiC and GaN in inverter-fed electrical machines, the switching losses of the power electronics can be reduced. However, this leads to steeper voltage gradients, resulting in a strongly nonlinear transient potential distribution along the winding of the electrical machine. As a result, the insulation system – especially the turn-to-turn insulation – is subjected to additional voltage stress. To carry out targeted dimensioning of the insulation system, it is necessary to calculate the transient potential distribution in advance. In the design of a hairpin winding, it is possible to influence the transient potential differences by employing a method called “shifting” within the winding scheme and thus to reduce the maximum potential differences that occur. On this basis, a targeted design of winding plans with hairpins can be achieved. Here, both the transient potential differences between the conductors within a slot of the stator core and the potential differences between the conductors of different phases in the end winding region of the machine are considered. Furthermore, the voltage differences between the conductors and the stator core are determined and compared for different variants. In this way, it is possible to reduce the amount of material used in the insulation system. Finally, an advantageous winding layout plan based on reduced potential differences is compared with a reference plan.

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Section: High Frequency Behaviour Of Electrical Machinesmentioning

confidence: 99%

Design of hairpin windings considering the transient potential distribution

Dittmann

England

Ponick

2023

Elektrotech. Inftech.

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“…However, as a consequence of the decreasing iron permeability with increasing frequency, the magnetic flux crosses slots, so that the couplings across a slot are not negligible at high frequencies, as [41] state. Thus, only a model such as that presented in [42], which includes all relevant inter-wire couplings, provides acceptable results for the common-mode impedance Z CM .…”

Section: Electrical Machine Modelmentioning

confidence: 99%

Electrical Bearing Damage, A Problem in the Nano- and Macro-Range

et al. 2022

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Rolling bearings face different damaging effects: Besides mechanical effects, current-induced bearing damage occurs in electrical drive systems. Therefore, it is of increasing interest to understand the differences leading to known electrical damage patterns. It is of utmost importance not to consider the harmful current passage in the machine element as an isolated phenomenon but to take into account the whole drive system consisting of the machine elements, the electric motor and the connected power electronics. This publication works toward providing an overview of the state-of-the-art of research regarding electrical bearing currents.

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“…FEM machine models have previously been proposed for the design stage [17][18][19][20][21][22][23][24][25][26]. These models are mainly based on 2D FEM simulations, which model all the strands of the coils but require high computational capabilities and long simulation durations.…”

Section: Introductionmentioning

confidence: 99%

High-Frequency Modelling of Electrical Machines for EMC Analysis

Moreno,

Egea,

Almandoz

et al. 2024

Electronics

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The trend towards electrification in mobility has led to the increased use of silicon carbide (SiC) semiconductors. These semiconductors are more efficient but also present challenges related to electromagnetic interference (EMI) due to their higher voltage derivatives. This paper introduces a new high-frequency impedance model for electrical machines. The proposed model distinguishes itself from existing approaches by being entirely derived from Finite Element Method (FEM) simulations, which include capacitances in the magnetic simulation. This approach achieves a balance between computational efficiency and high accuracy across the entire frequency spectrum, ranging from 100 Hz to 50 MHz. The model provides valuable insights during the design phase and was rigorously validated using data from 28 samples of an industrial machine.

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Common-Mode Impedance Prediction of a High Frequency Hairpin Stator Winding Based on FEM and Modified Nodal Analysis

Cited by 14 publications

References 17 publications

Design of hairpin windings considering the transient potential distribution

Design of hairpin windings considering the transient potential distribution

Electrical Bearing Damage, A Problem in the Nano- and Macro-Range

High-Frequency Modelling of Electrical Machines for EMC Analysis

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