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Implementation Issues in Voltage Zero Sequence-Based Encoderless Techniques

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5 Author(s)
Consoli, A. ; Dept. of Electr., Electron. & Syst. Eng. (DIEES), Univ. of Catania, Catania ; Scarcella, G. ; Scelba, G. ; Royak, S.
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Recent articles demonstrate that sensorless drives for induction motors can operate at zero-electrical and mechanical frequencies with the aid of high-frequency signal injection techniques and processing the zero-sequence voltage signals. The paper presents some practical implementation issues affecting the performance of such a technique and shows how to improve the quality of the estimated angle. All the assessments are experimentally proved and have a general value that can be extended to other sensorless techniques injecting high-frequency signal.

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Industry Applications, IEEE Transactions on  (Volume:44 ,  Issue: 1 )