Torque Harmonic Compensation in a Synchronous Reluctance Motor

The torque behavior of a synchronous reluctance motor [including the permanent magnet (PM) assisted configuration] is deeply analyzed. An analytical model is developed, showing the dependence of the torque ripple on the rotor geometry. The results of this model allow to individuate the position of t...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2008-06, Vol.23 (2), p.466-473
Main Authors: Bianchi, N., Bolognani, S., Bon, D., Dai Pre, M.
Format: Article
Language:English
Subjects:
Analytical models
Compensation
Geometry
Harmonics
Lamination
Low torque ripple
Magnetic analysis
Motors
permanent magnet (PM) assisted synchronous reluctance machine
Prototypes
Reluctance
Reluctance motors
Ripples
Rotors
Strategy
Synchronous motors
synchronous reluctance machine
Testing
Torque
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Summary:The torque behavior of a synchronous reluctance motor [including the permanent magnet (PM) assisted configuration] is deeply analyzed. An analytical model is developed, showing the dependence of the torque ripple on the rotor geometry. The results of this model allow to individuate the position of the flux--barrier ends so as to minimize the torque ripple. In addition, the proposed strategy to minimize the ripple is not only based on a suitable choice of the flux--barrier ends, but this choice is combined with the adoption of a rotor formed by two different laminations. This strategy allows an optimal compensation of the torque harmonics so that a smooth torque is achieved. Some motor prototypes have been manufactured and tested in a suitable testing bench. The torque versus position characteristics have been measured at very low speed, to avoid a reduction of the high-order torque harmonics. The experimental results confirm the effectiveness of the proposed strategy.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2007.914357