Stator reference frame approach for DC injection-based stator resistance estimation in electric drives
2015 (English)In: 2015 IEEE 11th International Conference on Power Electronics and Drive Systems, IEEE , 2015, Vol. Volume 2015, 867-872 p.Conference paper (Refereed)
This work discusses an online stator resistance estimation method for synchronous machines. Multiple improvements are provided with respect to a similar method already been used for induction machines. The method is based on the temporary injection of a DC voltage in the machine phases during normal operation. The stator resistance estimation is obtained by means of the Ohm's law. The proposed scheme works entirely in the stator fixed reference frame, without the need of any machine parameter. The selection of the DC injection level is discussed, as well as the countermeasures for reducing the spurious harmonics appearing in the currents and the torque when the machine is speed- and current-regulated. In particular, minimum electric loss and minimum torque ripple due to the injection is achieved. Moreover, as an alternative to conventional low-pass filtering of the measured signals, it is shown that the resistance estimation can be obtained by averaging the signals over few electric periods. Experiments prove the validity of the proposed approach.
Place, publisher, year, edition, pages
IEEE , 2015. Vol. Volume 2015, 867-872 p.
electric drives, harmonics suppression, stators, synchronous machines, torque control
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-185832DOI: 10.1109/PEDS.2015.7203391ScopusID: 2-s2.0-84952038944ISBN: 978-147994403-3OAI: oai:DiVA.org:kth-185832DiVA: diva2:924335
11th IEEE International Conference on Power Electronics and Drive Systems, PEDS 2015, Sydney, Australia, 9 June 2015 through 12 June 2015
QC 201604292016-04-282016-04-282016-04-29Bibliographically approved