Dc-link current and torque ripple optimized self-sensing control of interior permanent-magnet synchronous machines

To minimize the ripple on the dc-link current and torque due to carrier signal injections, conventional saliency-based self-sensing control schemes using voltage and current carrier signals for interior permanent magnet synchronous machines (IPMSMs) are optimized in this paper. Acoustic noise and efficiency of the self-sensing drive can also be enhanced. Carrier signal oriented coordinates are introduced to model the high frequency behavior of IPMSMs and are used for the analysis and the signal processing of proposed methods. Moreover, stability issues are discussed in this study. Experimental results on a commercial high voltage inverter confirm the applicability of the proposed methods.

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