Abstract
In electrical machines, various harmonic forces of both
mechanical and electromagnetic origin are acting on the
machine rotor. Typically, the main forces of the
mechanical origin are mass unbalance forces synchronous
with the rotor rotation frequency and its multiples and
sub-multiples. Forces of the electromagnetic origin are
induced by rotating magnetic fields in the air-gap
between the stator and rotor of the machine. The fields
may be originated, for instance, from the stator or rotor
slotting (higher harmonics), eccentric rotor motion,
saturation of magnetic materials or unipolar flux
(two-pole machines). The harmonic forces exerted on the
rotor may induce flexural rotor vibration with increased
bearing wear. In its extreme, the flexural rotor bending
modes may couple with the electromechanical system and
induce rotordynamic instability. In this paper, flexural
rotor vibration is considered in a two-pole cage
induction machine equipped with a built-in force
actuator. Previously, such a construction has mainly been
used for rotor levitation in self-bearing machines. An
analytical model for actuator-rotor system with flexural
rotor vibration is considered. By using the force
actuator, a special emphasize is put on control of the
rotor rotation harmonic vibration components. Analytical
formulations with experimental results by using a 30 kW
two-pole cage induction machine are provided.
Original language | English |
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Title of host publication | Proceedings of the 16th International Congress on Sound and Vibration, ICSV16 |
Place of Publication | Kraków |
ISBN (Electronic) | 9788360716717 |
Publication status | Published - 2009 |
MoE publication type | A4 Article in a conference publication |
Event | 16th International Congress on Sound and Vibration, ICSV16 - Krakow, Poland Duration: 5 Jul 2009 → 9 Jul 2009 |
Conference
Conference | 16th International Congress on Sound and Vibration, ICSV16 |
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Abbreviated title | ICSV16 |
Country/Territory | Poland |
City | Krakow |
Period | 5/07/09 → 9/07/09 |