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A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control

Wang, Shuo; Kang, Jinsong; Degano, Michele; Buticchi, Giampaolo

Authors

Shuo Wang

Jinsong Kang

Giampaolo Buticchi



Abstract

—In this paper, a cost-effective and highly accurate resolver-to-digital conversion (RDC) method is presented. The core of the idea is to apply a third-order rational fraction polynomial approximation (TRFPA) for the conversion of sinusoidal signals into the pseudo linear signals, which are extended to the range 0-360° in four quadrants. Then, the polynomial least squares method (PLSM) is used to achieve compensation to acquire the final angles. The presented method shows better performance in terms of accuracy and rapidity compared with the commercial available techniques in simulation results. This paper describes the implementation details of the proposed method and the way to incorporate it in digital signal processor (DSP) based permanent magnet synchronous motor (PMSM) drive system. Experimental tests under different conditions are carried out to verify the effectiveness for the proposed method. The obtained maximum error is about 0.0014° over 0-360° , which can usually be ignored in most industrial applications. Index Terms—Arc tangent function, Analog processing circuits, Pseudo linear signals, Resolver-to-digital conversion (RDC), Third-order rational fraction polynomial approximation (TRFPA).

Journal Article Type Article
Publication Date Dec 7, 2018
Journal IEEE Transactions on Industrial Electronics
Print ISSN 0278-0046
Electronic ISSN 1557-9948
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 66
Issue 8
Pages 6383-6392
APA6 Citation Wang, S., Kang, J., Degano, M., & Buticchi, G. (2018). A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control. IEEE Transactions on Industrial Electronics, 66(8), 6383-6392. https://doi.org/10.1109/TIE.2018.2884209
DOI https://doi.org/10.1109/TIE.2018.2884209
Keywords Control and Systems Engineering; Electrical and Electronic Engineering
Publisher URL https://ieeexplore.ieee.org/document/8566179
Additional Information © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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