Sensorless PMSM drive with DC-link current measurement

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Date
2007-09-23
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Language
en
Pages
7
2371-2377
Series
Conference record of the 2007 IEEE Industry Applications Conference Forty-Second IAS Annual Meeting (IAS'07)
Abstract
The paper proposes a motion-sensorless control method for permanent magnet synchronous motor drives when only the DC-link current is measured instead of the motor phase currents. A two-phase pulse-width modulation method is used, allowing the DC-link current to be sampled twice in a switching period at uniform intervals during active voltage vectors. A method is proposed for obtaining the current feedback for vector control, and an adaptive observer is used for estimating the rotor speed and position. The estimation is augmented with a high- frequency signal injection method at low speeds; a modified high- frequency excitation voltage is proposed for better performance. The proposed method enables stable operation of the permanent magnet synchronous motor drive in a wide speed range and under various loads. The effectiveness of the proposed method is demonstrated both by simulations and laboratory experiments.
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Keywords
DC-Link current measurement, permanent magnet synchronous machine, sensorless control, signal injection, DC-link current measurement
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Citation
Piippo , A , Suomela , K , Hinkkanen , M & Luomi , J 2007 , Sensorless PMSM drive with DC-link current measurement . in Conference record of the 2007 IEEE Industry Applications Conference Forty-Second IAS Annual Meeting (IAS'07) . pp. 2371-2377 , IEEE Industry Applications Society Annual Meeting , New Orleans, LA , United States , 23/09/2007 . https://doi.org/10.1109/07IAS.2007.358