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.
Sensorless Multiphase Induction Motor Drive Based on a Speed Observer Operating with Third-Order Field Harmonics
MENGONI, MICHELE;ZARRI, LUCA;TANI, ANGELO;SERRA, GIOVANNI;CASADEI, DOMENICO
2011
Abstract
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.File in questo prodotto:
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