Formal derivation of direct torque control for induction motors using the singular perturbation method

Z. Sorchini, P. T. Krein

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

Abstract

Direct torque control (DTC) is an induction motor control technique that has been successful because it explicitly considers the inverter stage and uses few machine parameters, while being more robust to parameter uncertainty than field oriented control (FOC). This paper presents a formal derivation of DTC based on the singular perturbation method (SPM). The derivation elaborates a link between DTC and feedback linearization and presents an explicit relationship between DTC performance and machine characteristics. It is shown that DTC can be considered a special case of a continuous-time feedback law under quantization of the flux angle and the flux magnitude and torque errors. In addition, the feedback law from which DTC is derived is shown to have equivalent performance and similar information requirements as DTC, while being more robust to parameter uncertainty than FOC. From the analysis, it is shown that low-leakage machines are expected to perform better under both DTC and the SPM controller. The derivation does not require space vector concepts; therefore the traditional link between DTC and space vectors is shown not to be a fundamental one.

Original languageEnglish (US)
Title of host publication36th IEEE Power Electronics Specialists Conference 2005
Pages2422-2428
Number of pages7
DOIs
StatePublished - Dec 1 2005

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
Volume2005
ISSN (Print)0275-9306

ASJC Scopus subject areas

  • Modeling and Simulation
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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    Sorchini, Z., & Krein, P. T. (2005). Formal derivation of direct torque control for induction motors using the singular perturbation method. In 36th IEEE Power Electronics Specialists Conference 2005 (pp. 2422-2428). [1581972] (PESC Record - IEEE Annual Power Electronics Specialists Conference; Vol. 2005). https://doi.org/10.1109/PESC.2005.1581972