A dynamic model for saturated induction machines with closed rotor slots and deep bars

This paper deals with a dynamic model for three-phase induction machines equipped with closed rotor slots and deep rotor bars. The thin bridges closing the rotor slots saturate highly as a function of the rotor current. The impedance of the rotor bars also varies much as a function of the rotor current frequency. An extended dynamic model, which takes into account the slot-bridge saturation and the deep-bar effect, is developed. The model extensions can be plugged into a standard machine model and parametrized easily. The proposed model can be applied to time-domain simulations, real-time control, and identification. The model is validated by means of finite-element analysis and experiments using a four-pole 5.6-kW induction machine. The results show that the accuracy of the proposed model is superior to the standard model, particularly under transient excitation typically used in standstill self-commissioning tests of induction motor drives.

Keywords

Closed rotor slots, Deep-bar effect, Dynamic model, Induction motor, Magnetic saturation, Standstill identification

DOI

10.1109/TEC.2019.2950810

Citation

Mölsä, E, Saarakkala, S E, Hinkkanen, M, Arkkio, A & Routimo, M 2020, ' A dynamic model for saturated induction machines with closed rotor slots and deep bars ', IEEE Transactions on Energy Conversion, vol. 35, no. 1, 8889405, pp. 157-165 . https://doi.org/10.1109/TEC.2019.2950810

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201911156249

Collections

[article-cris] Sähkötekniikan korkeakoulu / ELEC

Show all metadata

A dynamic model for saturated induction machines with closed rotor slots and deep bars

Access rights

URL

Journal Title

Journal ISSN

Volume Title

Authors

Date

Department

Major/Subject

Mcode

Degree programme

Language

Pages

Series

Abstract

Description

Keywords

Other note

DOI

Citation

Permanent link to this item

Collections