Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 174 |
| Fachzeitschrift | Energies |
| Jahrgang | 14 |
| Ausgabenummer | 1 |
| Frühes Online-Datum | 31 Dez. 2020 |
| Publikationsstatus | Veröffentlicht - Jan. 2021 |
Abstract
Common-mode voltage, caused by a 2-level inverter, is a source of discharge currents in motor bearings. Due to the capacitive coupling, between the stator winding and the rotor, an image of the common-mode voltage is produced on the shaft—which can exceed the dielectric strength of the lubrication film of motor bearings. Accurate determination of the winding-to-rotor capacitance is necessary to predict the shaft voltage. This article proposes a novel analytical determination of the slot and the end-winding portion of the winding-to-rotor capacitance. The calculation rules, which are based on the method of image charges and the charge simulation method, take into account the continuity and the boundary conditions of the field areas. Results are validated by means of finite element method simulations. Notably, deviations are in the single-digit percentage range. Furthermore, the presented methods are simple to implement.
ASJC Scopus Sachgebiete
- Mathematik (insg.)
- Steuerung und Optimierung
- Energie (insg.)
- Energie (sonstige)
- Energie (insg.)
- Energieanlagenbau und Kraftwerkstechnik
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
- Energie (insg.)
- Feuerungstechnik
- Energie (insg.)
- Erneuerbare Energien, Nachhaltigkeit und Umwelt
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in: Energies, Jahrgang 14, Nr. 1, 174, 01.2021.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung
}
TY - JOUR
T1 - Analytical Determination of the Slot and the End-Winding Portion of the Winding-to-Rotor Capacitance for the Prediction of Shaft Voltage in Electrical Machines
AU - Stockbrügger, Jan Ole
AU - Ponick, Bernd
N1 - Funding Information: Funding: This research was funded by BMWi/AiF—Bundesministerium für Wirtschaft und En-ergie/Arbeitsgemeinschaft industrieller Forschungsvereinigungen grant number 20496 N.
PY - 2021/1
Y1 - 2021/1
N2 - Common-mode voltage, caused by a 2-level inverter, is a source of discharge currents in motor bearings. Due to the capacitive coupling, between the stator winding and the rotor, an image of the common-mode voltage is produced on the shaft—which can exceed the dielectric strength of the lubrication film of motor bearings. Accurate determination of the winding-to-rotor capacitance is necessary to predict the shaft voltage. This article proposes a novel analytical determination of the slot and the end-winding portion of the winding-to-rotor capacitance. The calculation rules, which are based on the method of image charges and the charge simulation method, take into account the continuity and the boundary conditions of the field areas. Results are validated by means of finite element method simulations. Notably, deviations are in the single-digit percentage range. Furthermore, the presented methods are simple to implement.
AB - Common-mode voltage, caused by a 2-level inverter, is a source of discharge currents in motor bearings. Due to the capacitive coupling, between the stator winding and the rotor, an image of the common-mode voltage is produced on the shaft—which can exceed the dielectric strength of the lubrication film of motor bearings. Accurate determination of the winding-to-rotor capacitance is necessary to predict the shaft voltage. This article proposes a novel analytical determination of the slot and the end-winding portion of the winding-to-rotor capacitance. The calculation rules, which are based on the method of image charges and the charge simulation method, take into account the continuity and the boundary conditions of the field areas. Results are validated by means of finite element method simulations. Notably, deviations are in the single-digit percentage range. Furthermore, the presented methods are simple to implement.
KW - winding-to-rotor capacitance
KW - shaft voltage
KW - EDM currents
KW - traction motor
KW - Shaft voltage
KW - Winding-to-rotor capacitance
KW - Traction motor
UR - http://www.scopus.com/inward/record.url?scp=85106202453&partnerID=8YFLogxK
U2 - 10.3390/en14010174
DO - 10.3390/en14010174
M3 - Article
VL - 14
JO - Energies
JF - Energies
SN - 1996-1073
IS - 1
M1 - 174
ER -