Details
| Original language | English |
|---|---|
| Article number | 358 |
| Journal | ENERGIES |
| Volume | 15 |
| Issue number | 1 |
| Publication status | Published - 4 Jan 2022 |
Abstract
This article describes a practical method for predicting the distribution of electric potential inside an electrical machine’s winding based on design data. It broadens the understanding of winding impedance in terms of inter-winding behavior and allows to properly design an electrical machine’s insulation system during the development phase. The predictions are made based on an frequency-dependent equivalent circuit of the electrical machine which is validated by measurements in the time domain and the frequency domain. Element parameters for the equivalent circuit are derived from two-dimensional field simulations. The results demonstrate a non-uniform potential distribution and demonstrate that the potential difference between individual turns and between turns and the stator core exceeds the expected values. The findings also show a link between winding impedance and potential oscillations inside the winding. Additionally, the article provides an overview of the chronological progression of turn-based models and shows how asynchronous multiprocessing is used to accelerate the solution process of the equivalent circuit.
Keywords
- Differential mode, Electrical machine, Frequency inverter, Frequency response, HF impedance, HF lumped parameter model, HF modeling, Insulation stress, Potential distribution, Random-wound, Voltage stress, Wide-bandgap
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Fuel Technology
- Energy(all)
- Energy Engineering and Power Technology
- Energy(all)
- Energy (miscellaneous)
- Mathematics(all)
- Control and Optimization
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: ENERGIES, Vol. 15, No. 1, 358, 04.01.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Method to Predict the Non-Uniform Potential Distribution in Random Electrical Machine Windings under Pulse Voltage Stress
AU - Hoffmann, Alexander
AU - Ponick, Bernd
N1 - Funding Information: Funding: This research was funded by the Federal Ministry for Economic Affairs and Energy (BMWi) based on a decision by the German Bundestag and DLR Projektträger (DLR-PT) under grant number Speed4E 01MY17003B.
PY - 2022/1/4
Y1 - 2022/1/4
N2 - This article describes a practical method for predicting the distribution of electric potential inside an electrical machine’s winding based on design data. It broadens the understanding of winding impedance in terms of inter-winding behavior and allows to properly design an electrical machine’s insulation system during the development phase. The predictions are made based on an frequency-dependent equivalent circuit of the electrical machine which is validated by measurements in the time domain and the frequency domain. Element parameters for the equivalent circuit are derived from two-dimensional field simulations. The results demonstrate a non-uniform potential distribution and demonstrate that the potential difference between individual turns and between turns and the stator core exceeds the expected values. The findings also show a link between winding impedance and potential oscillations inside the winding. Additionally, the article provides an overview of the chronological progression of turn-based models and shows how asynchronous multiprocessing is used to accelerate the solution process of the equivalent circuit.
AB - This article describes a practical method for predicting the distribution of electric potential inside an electrical machine’s winding based on design data. It broadens the understanding of winding impedance in terms of inter-winding behavior and allows to properly design an electrical machine’s insulation system during the development phase. The predictions are made based on an frequency-dependent equivalent circuit of the electrical machine which is validated by measurements in the time domain and the frequency domain. Element parameters for the equivalent circuit are derived from two-dimensional field simulations. The results demonstrate a non-uniform potential distribution and demonstrate that the potential difference between individual turns and between turns and the stator core exceeds the expected values. The findings also show a link between winding impedance and potential oscillations inside the winding. Additionally, the article provides an overview of the chronological progression of turn-based models and shows how asynchronous multiprocessing is used to accelerate the solution process of the equivalent circuit.
KW - Differential mode
KW - Electrical machine
KW - Frequency inverter
KW - Frequency response
KW - HF impedance
KW - HF lumped parameter model
KW - HF modeling
KW - Insulation stress
KW - Potential distribution
KW - Random-wound
KW - Voltage stress
KW - Wide-bandgap
UR - http://www.scopus.com/inward/record.url?scp=85122212770&partnerID=8YFLogxK
U2 - 10.3390/en15010358
DO - 10.3390/en15010358
M3 - Article
AN - SCOPUS:85122212770
VL - 15
JO - ENERGIES
JF - ENERGIES
SN - 1996-1073
IS - 1
M1 - 358
ER -