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Influence of Neutral Line to the Optimal Drive Current of PMAC Motors

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7 Author(s)
Bi, C. ; Data Storage Institute, A-STAR,, Singapore ; Aung, N.L.H. ; Soh, C.S. ; Jiang, Q.
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The optimal drive current can reduce both the torque ripple and power loss in driving the permanent magnetic (PM) AC motor. This paper presents an analytical model for calculating the optimal drive current of the PMAC motor with surface mount PM rotor. Both the motors with and without the neutral line are analyzed. Theoretical analysis shows that, when the back-emf of the windings contains triple order harmonics, the neutral line of the motor can let the optimal drive current be different from the one without the neutral line, and it can also make the optimal drive current be more effective in the loss and torque ripple reduction. Two spindle motors are used in the analysis to show the influences of the optimal model presented.

Published in:

Magnetics, IEEE Transactions on  (Volume:49 ,  Issue: 6 )

Date of Publication:

June 2013

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