A Resolver Angle Estimator Based on Its Excitation Signal

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Author Ben-Brahim, L. en_US
Author Benammar, M. en_US
Author Alhamadi, M.A. en_US
Available date 2009-12-27T10:25:59Z en_US
Publication Date 2009 en_US
Publication Name IEEE Transactions on Industrial Electronics
Citation Ben-Brahim, L.; Benammar, M.; Alhamadi, M.A., "A Resolver Angle Estimator Based on Its Excitation Signal," Industrial Electronics, IEEE Transactions on , vol.56, no.2, pp.574,580, Feb. 2009 en_US
URI http://dx.doi.org/10.1109/TIE.2008.2002719 en_US
URI http://hdl.handle.net/10576/10495 en_US
Abstract A resolver generates a pair of signals proportional to the sine and cosine of the angular position of its shaft. A new low-cost method for converting the amplitudes of these sine/cosine transducer signals into a measure of the input angle without using lookup tables is proposed. The new method takes advantage of the components used to operate the resolver, the excitation (carrier) signal in particular. This is a feedforward method based on comparing the amplitudes of the resolver signals to those of the excitation signal together with another shifted by π. A simple method is then used to estimate the shaft angle through this comparison technique. The poor precision of comparison of the signals around their highly nonlinear peak regions is avoided by using a simple technique that relies only on the alternating pseudolinear segments of the signals. This results in a better overall accuracy of the converter. Beside simplicity of implementation, the proposed scheme offers the advantage of robustness to amplitude fluctuation of the transducer excitation signal. © 2009 IEEE. en_US
Language en en_US
Publisher IEEE en_US
Subject Estimator en_US
Subject Lookup table (LUT) en_US
Subject Position sensors en_US
Subject Resolver converter en_US
Title A Resolver Angle Estimator Based on Its Excitation Signal en_US
Type Article en_US

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