Identification of the Synchronous Machine Inductances by Using Switching Power Converters Applied in Sensorless and Current Control

Frederik De Belie, Omar Ellabban, Philippe Lataire, Kristof Vandemergel, Jan Melkebeek

Research output: Chapter in Book/Report/Conference proceedingConference paperResearch

1 Citation (Scopus)

Abstract

This paper deals with the identi?cation of a synchronous machine parameter usefull for the purpose of
sensorless and current control. Deviations from the steady-state voltage are generated by the current
controller in order to drive the current to its desired value. In sensorless drives, voltage deviations from
steady state are used in the case the back-emf is too low to obtain an accurate rotor position estimation.
The voltage deviation applied, generates a measurable current ripple from which an estimation of the
rotor position can be made. To study the dynamic behaviour of the current controller as well as the
accuracy of the position estimator, the current response on voltage deviations from steady state is of
importance. Furthermore, it can be of interest for the controller performance to take into account the
in?uence of magnetic saturation and magnetic interaction.
This paper discusses a strategy to measure the current dependence of the machine impedance. It uses the
small voltage deviations generated during current control or sensorless control and consequently avoids
interference with the normal operation of the drive. To verify the method, experimental identifcation
of the machine impedance is conducted on a permanent-magnet machine of 3.7 kW supplied by using a
voltage-source inverter (VSI) with IGBTs. A second set of experiments is performed on a synchronous
machine of 150 kVA with rotor ?eld winding for which the stator is supplied by using a full-bridge
thyristor rectifer (FBR). The generation of voltage signals is discussed here for the VSI as well as the
FBR as these converters are often used for the power convertion in synchronous drives.
Original languageEnglish
Title of host publicationThe 13th European Conference on Power Electronics and Applications, 2009. EPE '09, 8-10 Sept. 2009
Pages1-11
Number of pages11
Publication statusPublished - 8 Sep 2009
EventFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet - Stockholm, Sweden
Duration: 21 Sep 200925 Sep 2009

Conference

ConferenceFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet
Country/TerritorySweden
CityStockholm
Period21/09/0925/09/09

Keywords

  • synchronous motor
  • <permanent magnet motor
  • <modelling
  • test bench

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