Adaptive online rotor resistance identification for bearingless induction motors

doi:10.16511/j.cnki.qhdxxb.2015.22.007

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Abstract Bearingless induction motors always suffer from the influence of rotor resistance variations. An adaptive online rotor resistance identification method is developed here based on an observer of the suspension force commands. This study analyzes the influence of the rotor resistance variation on the air-gap flux identification. Real-time online identification of the rotor resistance is based on observations of the suspension force commands, which utilizes the principle that the suspension force commands are sensitive to the air-gap flux in the torque windings. Tests of a bearingless induction motor show that the peak-peak displacements of the rotor are reduced by 60% by this adaptive online rotor resistance identification method.

Keywords bearingless induction motor rotor field orientation rotor resistance identification suspension control

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TM346

Issue Date: 15 October 2015

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	ZHAN Lixin
	ZHOU Kai

Cite this article:

ZHAN Lixin,ZHOU Kai. Adaptive online rotor resistance identification for bearingless induction motors[J]. Journal of Tsinghua University(Science and Technology), 2015, 55(10): 1072-1078.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2015.22.007 OR http://jst.tsinghuajournals.com/EN/Y2015/V55/I10/1072

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