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Low-frequency signal-injection method for speed sensorless vector control of induction motors

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Leppänen, Veli-Matti
dc.date.accessioned 2012-02-10T09:10:20Z
dc.date.available 2012-02-10T09:10:20Z
dc.date.issued 2003-12-17
dc.identifier.isbn 951-22-6851-5
dc.identifier.issn 1456-0445
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2147
dc.description.abstract A new method for the speed sensorless vector control of induction motors at low speeds is presented. The method overcomes the well-known low-speed limitations of conventional methods based on an ideal motor model, yet without relying on a more detailed motor model or parasitic effects. To overcome the low-speed limitations, the ideal motor model is augmented with mechanical dynamics. The response of the electromechanical system to a low-frequency ac current signal injected into the stator winding depends on the direction of the signal relative to the rotor flux direction. Based on this dependency, a new algorithm for rotor flux angle estimation, applicable when the total moment of inertia is not too high, is developed. The estimation method tolerates any low-speed operation point, including zero stator frequency, which is validated by simulations and experiments. The robustness of the method against errors in motor parameter estimates is shown both theoretically and experimentally. The algorithm is also combined with a full-order flux observer, yielding fast dynamics in addition to steady-state stability at low speeds. en
dc.format.extent 70, [78]
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.ispartofseries Institute of Intelligent Power Electronics publications en
dc.relation.ispartofseries 7 en
dc.relation.haspart Leppänen V.-M. and Luomi J., 2001. Estimating the back-EMF of an induction motor. Proceedings of the 9th European Conference on Power Electronics and Applications (EPE 2001). Graz, Austria, 27-29 August 2001, on CD-ROM.
dc.relation.haspart Leppänen V.-M. and Luomi J., 2002. Effect of equation of motion on low-frequency impedance of induction motors – an approach for rotor flux angle estimation. Proceedings of the 10th Power Electronics and Motion Control Conference (EPE-PEMC 2002). Cavtat & Dubrovnik, Croatia, 9-11 September 2002, on CD-ROM.
dc.relation.haspart Leppänen V.-M. and Luomi J., 2002. A tracking controller for a speed sensorless induction machine drive. Proceedings of the 2002 Nordic Workshop on Power and Industrial Electronics (NORPIE 2002). Stockholm, Sweden, 12-14 August 2002, on CD-ROM.
dc.relation.haspart Leppänen V.-M. and Luomi J., 2002. Rotor flux angle tracking controller for sensorless induction motor drives. Conference Record of the 2002 IEEE Industry Applications Conference (IAS 2002). Pittsburgh, PA, USA, 13-18 October 2002, Vol. 2, pages 856-863.
dc.relation.haspart Leppänen V.-M. and Luomi J., 2002. Speed sensorless induction machine control for zero speed and frequency. Conference Record of the 28th Annual Conference of the IEEE Industrial Electronics Society (IECON'02). Sevilla, Spain, 5-8 November 2002, pages 400-405.
dc.relation.haspart Leppänen V.-M. and Luomi J., 2003. Observer using low-frequency injection for sensorless induction motor control – parameter sensitivity analysis. Conference Record of the IEEE International Electric Machines and Drives Conference (IEMDC 2003). Madison, WI, USA, 1-4 June 2003, pages 609-616.
dc.relation.haspart Leppänen V.-M., 2003. Low-frequency injection-based speed sensorless control of induction motors – applicability and implementation aspects. Proceedings of the 10th European Conference on Power Electronics and Applications (EPE 2003). Toulouse, France, 2-4 September 2003, on CD-ROM.
dc.relation.haspart Hinkkanen M., Leppänen V.-M. and Luomi J., 2003. Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors. Conference Record of the 2003 IEEE Industry Applications Conference (IAS 2003). Salt Lake City, UT, USA, 12-16 October 2003, pages 1150-1156.
dc.relation.haspart Kereszty T., Leppänen V.-M. and Luomi J., 2003. Sensorless control of surface magnet synchronous motors at low speeds using low-frequency signal injection. Conference Record of the 29th Annual Conference of the IEEE Industrial Electronics Society (IECON'03). Roanoke, VA, USA, 2-6 November 2003, pages 1239-1243.
dc.subject.other Electrical engineering en
dc.title Low-frequency signal-injection method for speed sensorless vector control of induction motors en
dc.type G5 Artikkeliväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Electrical and Communications Engineering en
dc.contributor.department Sähkö- ja tietoliikennetekniikan osasto fi
dc.subject.keyword induction motor en
dc.subject.keyword sensorless control en
dc.subject.keyword rotor flux angle estimation en
dc.subject.keyword full-order flux observer en
dc.identifier.urn urn:nbn:fi:tkk-001154
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en
dc.contributor.lab Power Electronics Laboratory en
dc.contributor.lab Tehoelektroniikan laboratorio fi


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