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High-Accuracy All-Digital Resolver-to-Digital Conversion.

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Title: High-Accuracy All-Digital Resolver-to-Digital Conversion.
Authors: Bergas-Jan?, Joan1, Ferrater-Sim?n, Coia1, Gross, Gabriel1, Ram?rez-Pisco, Rodrigo1, Galceran-Arellano, Samuel1, Rull-Duran, Joan2
Source: IEEE Transactions on Industrial Electronics. Dec2011, Vol. 59 Issue 1, p326-333. 8p.
Subjects: Analog-to-digital converters, Phase detectors, Electric filters, Computer software, Statistical sampling, Cost analysis, Simulation methods & models, Signal processing, Phase-locked loops, Digital signal processing
Abstract: In this paper, a high-accuracy all-digital resolverto-digital (R/D) converter is presented. The two basic components of a conventional tracking R/D converter, the phase detector and the loop filter, are software implemented by frequency-shifting techniques and a decoupled double synchronous reference frame-based phase-locked loop (DSRF-PLL). This PLL allows the simultaneous extraction of the angular position and speed of the rotatory resolver, even in the presence of gain and phase errors in the resolver. In order to increase accuracy and to minimize the time lag of the whole system, oversampling methods and downsampling finite-impulse response digital filters are introduced. Finally, DSP implementation issues, like the use of techniques to synchronize the resolver output signals with the excitation one, are discussed. Using these combined techniques and a standard DSP with a 12-bit analog-to-digital converter, resolutions of up to 14 bits can be achieved with a computation cost of about 13% of the total (100 MIPs). The paper presents the main techniques, simulation, and experimental results. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Industrial Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: In this paper, a high-accuracy all-digital resolverto-digital (R/D) converter is presented. The two basic components of a conventional tracking R/D converter, the phase detector and the loop filter, are software implemented by frequency-shifting techniques and a decoupled double synchronous reference frame-based phase-locked loop (DSRF-PLL). This PLL allows the simultaneous extraction of the angular position and speed of the rotatory resolver, even in the presence of gain and phase errors in the resolver. In order to increase accuracy and to minimize the time lag of the whole system, oversampling methods and downsampling finite-impulse response digital filters are introduced. Finally, DSP implementation issues, like the use of techniques to synchronize the resolver output signals with the excitation one, are discussed. Using these combined techniques and a standard DSP with a 12-bit analog-to-digital converter, resolutions of up to 14 bits can be achieved with a computation cost of about 13% of the total (100 MIPs). The paper presents the main techniques, simulation, and experimental results. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of IEEE Transactions on Industrial Electronics is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1109/TIE.2011.2143370
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      – SubjectFull: Phase detectors
        Type: general
      – SubjectFull: Electric filters
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      – SubjectFull: Computer software
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      – SubjectFull: Statistical sampling
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      – SubjectFull: Cost analysis
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      – SubjectFull: Simulation methods & models
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      – SubjectFull: Signal processing
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      – SubjectFull: Phase-locked loops
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      – SubjectFull: Digital signal processing
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      – TitleFull: High-Accuracy All-Digital Resolver-to-Digital Conversion.
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              Text: Dec2011
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