Flux compensated direct torque control of induction motor drives for low speed operation

Kuo Kai Shyu, Li Jen Shang, Hwang Zhi Chen, Ko Wen Jwo

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Speed control of direct torque controlled (DTC) induction motor drives depends on effectively establishing the stator flux. However, it becomes difficult when the motor operates in the low speed region, because the voltage drop on the stator resistance is comparable with the input stator voltage. Therefore, this study proposes an easy but effective way to compensate the voltage drop on the stator resistance so that the stator flux can be constructed without identifying the stator resistance as done by most authors. As a result, motor torque is constructed due to the effective stator flux compensation, which makes the DTC applicable to induction motor drives in the low speed region. Moreover, a fixed-point digital signal processor (DSP)-based hardware experimental system is built to demonstrate the effectiveness of the proposed control method.

Original languageEnglish
Pages (from-to)1608-1613
Number of pages6
JournalIEEE Transactions on Power Electronics
Volume19
Issue number6
DOIs
StatePublished - Nov 2004

Keywords

  • Direct torque control (DTC)
  • Induction motor
  • Low speed

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