Dietz, Daniel ; Binder, Andreas (2021)
Operational constraints of zero-sequence current feeding in bearingless PM synchronous machines.
In: e & i Elektrotechnik und Informationstechnik, 138 (6)
doi: 10.1007/s00502-021-00902-4
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
For magnetically levitated drives with a 3-phase stator winding, one degree of freedom in the rotor motion can be controlled through a zero-sequence current. For example, an axial active magnetic bearing or a single-phase motor winding can be fed by this zero-sequence current. The zero-sequence current feeding is advantageous due to the saving of power electronic switches. This way, the 4-quadrant chopper can be replaced by connecting the coil to be fed with the star point of the 3-phase winding. The field of application for this principle is limited by non-linearities at high inverter modulation degrees since the maximum possible voltages of the zero-sequence current system and the 3-phase current system are mutually dependent. Therefore, a pulse width modulation is discussed, which prioritizes the 3-phase voltage system over the zero-sequence voltage system, in contrast to a modulation without prioritization. These two methods are evaluated by the maximum possible voltages and the voltage harmonic content. If only one of the two current systems demands high-voltage values, such as in the combination of a magnetic bearing and a motor winding, the zero-sequence current feeding is well-suited.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Dietz, Daniel ; Binder, Andreas |
| Art des Eintrags: | Bibliographie |
| Titel: | Operational constraints of zero-sequence current feeding in bearingless PM synchronous machines |
| Sprache: | Englisch |
| Publikationsjahr: | Oktober 2021 |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | e & i Elektrotechnik und Informationstechnik |
| Jahrgang/Volume einer Zeitschrift: | 138 |
| (Heft-)Nummer: | 6 |
| DOI: | 10.1007/s00502-021-00902-4 |
| URL / URN: | https://link.springer.com/article/10.1007/s00502-021-00902-4... |
| Kurzbeschreibung (Abstract): | For magnetically levitated drives with a 3-phase stator winding, one degree of freedom in the rotor motion can be controlled through a zero-sequence current. For example, an axial active magnetic bearing or a single-phase motor winding can be fed by this zero-sequence current. The zero-sequence current feeding is advantageous due to the saving of power electronic switches. This way, the 4-quadrant chopper can be replaced by connecting the coil to be fed with the star point of the 3-phase winding. The field of application for this principle is limited by non-linearities at high inverter modulation degrees since the maximum possible voltages of the zero-sequence current system and the 3-phase current system are mutually dependent. Therefore, a pulse width modulation is discussed, which prioritizes the 3-phase voltage system over the zero-sequence voltage system, in contrast to a modulation without prioritization. These two methods are evaluated by the maximum possible voltages and the voltage harmonic content. If only one of the two current systems demands high-voltage values, such as in the combination of a magnetic bearing and a motor winding, the zero-sequence current feeding is well-suited. |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektrische Energiewandlung > Elektrische Energiewandlung 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektrische Energiewandlung |
| Hinterlegungsdatum: | 03 Nov 2022 15:01 |
| Letzte Änderung: | 19 Jan 2023 16:54 |
| PPN: | 503924911 |
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