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

Wang, Shuo and Kang, Jinsong and Degano, Michele and Buticchi, Giampaolo (2018) A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control. IEEE Transactions on Industrial Electronics . p. 1. ISSN 1557-9948

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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

Item Type: Article
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.
Keywords: Arc tangent function; Analog processing circuits; Pseudo linear signals; Resolver-to-digital conversion (RDC); Third-order rational fraction polynomial approximation (TRFPA).
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > School of Aerospace
University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: https://doi.org/10.1109/TIE.2018.2884209
Depositing User: QIU, Lulu
Date Deposited: 07 Jan 2019 13:15
Last Modified: 07 Jan 2019 13:15
URI: http://eprints.nottingham.ac.uk/id/eprint/55837

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