A resolver-to-digital conversion system based on second order Butterworth low pass filter

Pengcheng Zhu; Yongsheng Huang; Jiming Zou; Yongxiang Xu

doi:10.1117/12.2619449

29 November 2021 A resolver-to-digital conversion system based on second order Butterworth low pass filter

Pengcheng Zhu, Yongsheng Huang, Jiming Zou, Yongxiang Xu

Proceedings Volume 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021); 120801R (2021) https://doi.org/10.1117/12.2619449
Event: 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 2021, Nanchang, China

Abstract

Resolvers exhibit relatively impressive ruggedness, high accuracy, strong anti-interference ability and wonderful reliability in many household and industrial applications. However, it is necessary to use Resolver-to-Digital Conversion (RDC) to get the position and speed from the resolvers, due to the analogue output of resolvers. In this paper, an RDC system with excellent performance is proposed based on frequency shifting method by using Butterworth low pass filter and type-II Angle Tracking Observer (ATO) to estimate resolver shaft angle. Because of the outstanding frequency response characteristic of Butterworth filter, lower phase delay, more sufficient bandwidth and higher accuracy can be achieve compared by traditional RC filters. Eventually, both simulations and experimental results validate the effectiveness and feasibility of the proposed method.

Citation Download Citation

Pengcheng Zhu, Yongsheng Huang, Jiming Zou, and Yongxiang Xu "A resolver-to-digital conversion system based on second order Butterworth low pass filter", Proc. SPIE 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 120801R (29 November 2021); https://doi.org/10.1117/12.2619449

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KEYWORDS

Linear filtering

Error analysis

Electronic filtering

Demodulation

Signal attenuation

Digital signal processing

Nonlinear filtering

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