Sensorless PMSM drive with DC-link current measurement

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.

Keywords

DC-Link current measurement, permanent magnet synchronous machine, sensorless control, signal injection, DC-link current measurement

DOI

10.1109/07IAS.2007.358

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

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https://urn.fi/URN:NBN:fi:aalto-201609294519

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[article-cris] Sähkötekniikan korkeakoulu / ELEC

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Sensorless PMSM drive with DC-link current measurement

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