NDLI: Novel coil arrangement of an integrated displacement sensor with reduced influence of suspension fluxes for a wide gap bearingless motor

Content Provider	IEEE Xplore Digital Library
Author	Tsukada, N. Onaka, T. Asama, J. Chiba, A. Fukao, T.
Copyright Year	2009
Description	Author affiliation: Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan (Tsukada, N.; Onaka, T.; Chiba, A.) \|\| Motor Solution, Co. Ltd, 2641 Yamazaki, Noda, Chiba 278-8501, Japan (Fukao, T.) \|\| Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, 432-8561, Japan (Asama, J.)
Abstract	Displacement sensors are necessary for bearingless motors and magnetic bearings. A sensor target ring is needed in a rotor shaft, thus, the axial length has to be extended. The shaft extension is considerable when a gap length is large because a wide gap sensor needs a large diameter in a sensor head coil. To solve this problem, search coils have been installed in a stator for rotor displacement estimation. However, there is the serious interference between suspension winding current and search coils. In this paper, the interference is theoretically and experimentally investigated. Two search coil connections are compared. Sensor output characteristics of one of the proposed connection are found to be effective in the interference elimination, even though suspension windings are driven by a three-phase inverter.
Starting Page	2474
Ending Page	2480
File Size	474247
Page Count	7
File Format	PDF
ISBN	9781424428939
DOI	10.1109/ECCE.2009.5316383
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Magnetic Bearings Rotors Interference Sensor phenomena and characterization Magnetic heads Inverters Displacement Sensor Shafts Search Coil Magnetic sensors Interference elimination Stators Suspension Windings Magnetic levitation
Content Type	Text
Resource Type	Article

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