Saliency-Based Rotor Spatial Position Displacement Self-Sensing for Self-Bearing Machines

Self-bearing machines do not contain physical bearings but magnetic bearings. Both rotor rotary and spatial positions displacement are required in these types of machines to control the rotor position while it is levitating. Self-bearing machines often use external sensors for (horizontal) and (vert...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 22; no. 24; p. 9663
Main Authors Kang, Ye Gu, Fernandez, Daniel, Reigosa, David Diaz
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 09.12.2022
MDPI
Subjects
bearingless permanent magnet synchronous machines (BPMSMs)
high-frequency signal injection (HFI)
Inductance
Machinery
Magnetic bearings
Magneto-electric machines
Permeability
Position measurement
Position sensing
rotor eccentricity
rotor translational displacement
Rotors
Salience
Sensitivity analysis
Sensors
spatial position
Vertical orientation
Winding
xy-position self-sensing
rotor eccentricity
bearingless permanent magnet synchronous machines (BPMSMs)
spatial position
rotor translational displacement
xy-position self-sensing
high-frequency signal injection (HFI)
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Summary:Self-bearing machines do not contain physical bearings but magnetic bearings. Both rotor rotary and spatial positions displacement are required in these types of machines to control the rotor position while it is levitating. Self-bearing machines often use external sensors for (horizontal) and (vertical) spatial position measurement, which will result in additional cost, volume, complexity, and number of parts susceptible to failure. To overcome these issues, this paper proposes a xy-position estimation self-sensing technique based on both main- and cross-inductance variation. The proposed method estimates and position based on inductive saliency between two sets of three-phase coils. The proposed idea is applied on a combined winding self-bearing machine which does not require additional suspension force winding. No additional search coil placement for xy-position estimation is required. Therefore, the proposed algorithm can result in a compact size self-bearing machine that does not require external sensors for xy-position measurement and suspension force winding.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s22249663