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Sensorless multiphase induction motor drive based on a speed observer operating with third-order field harmonics

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5 Author(s)
Mengoni, M. ; Dept. of Electr. Eng., Univ. of Bologna, Bologna, Italy ; Zarri, L. ; Tani, A. ; Serra, G.
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This paper presents an electric drive consisting of a multiphase induction motor fed by multiphase inverter. The control system is similar to that of a traditional field-oriented control for three-phase motors, but the machine state is determined by a novel sensorless observer. Since multiphase motors with M phases (M is supposed odd) have the capability of controlling the spatial harmonics of the magnetic field up to the (M-2)th order, the proposed observer excites the third-order spatial harmonic of the magnetic field to estimate the rotor speed. Experimental results are provided to show the feasibility of the electric drive.

Published in:

Energy Conversion Congress and Exposition (ECCE), 2011 IEEE

Date of Conference:

17-22 Sept. 2011