Reduction of synchronous torques in induction machines using asymmetrical rotor slots
2012 (English)In: ICEMS 2012 - Proceedings: 15th International Conference on Electrical Machines and Systems, Institution of Electrical Engineers of Japan (IEEJ), 2012, 6401765- p.Conference paper (Refereed)
Removing the rotor skew in induction machines reduces the negative effects created by inter-bar currents. On the other hand, synchronous torques at low rotor speeds may appear, this can prevent the rotor to reach its rated speed. This paper presents a new method for the reduction of synchronous torques in unskewed induction machines. By introducing modulated rotors, having an asymmetrical rotor slot distribution, these parasitic torques can be suppressed. A simple numerical model is used to find suitable modulation coefficients for an efficient reduction of synchronous torques. This method is verified by FEM-simulations of different rotor designs. The results show that the synchronous torques can be controlled by the modulation coefficients used.
Place, publisher, year, edition, pages
Institution of Electrical Engineers of Japan (IEEJ), 2012. 6401765- p.
Synchronous Torques, Starting Torque, Modulated Rotors, Asymmetrical Rotor Slots.
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-107595ISI: 000332791700067ScopusID: 2-s2.0-84873458181ISBN: 978-488686077-4OAI: oai:DiVA.org:kth-107595DiVA: diva2:576821
15th International Conference on Electrical Machines and Systems, ICEMS 2012; Sapporo; 21 October 2012 through 24 October 2012
QC 201302202012-12-132012-12-132014-10-14Bibliographically approved