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Sensor-less vector control of induction motor at low-speed operation using modular multilevel converter
Published in Taylor and Francis
2019
Volume: 16
   
Issue: 3
Pages: 127 - 135
Abstract
Modular Multilevel Converter (MMC) is widely known as one of the most promising topologies for high power medium voltage application. However, MMC is still limited when it comes to Variable Speed Drive (VSD) applications. The reasons behind this is the large fluctuations in the submodules capacitor voltages during low-speed constant torque operation. Thus, the feasibility of sensor-less vector control of MMC based variable speed drive is considered as a difficult task. This paper proposes a novel speed observer for MMC-based VSD suitable for low-speed operation. Speed estimation is carried out by using the stator currents and the input voltages. A discrete model where the rotor parameters do not change during a short sampling time is considered. An extensive simulation is carried out for verifying the closed loop operation of the proposed speed sensor -less MMC-based VSD. © 2019, © 2019 Engineers Australia.
About the journal
JournalData powered by TypesetAustralian Journal of Electrical and Electronics Engineering
PublisherData powered by TypesetTaylor and Francis
ISSN1448837X
Open AccessNo
Concepts (4)
  •  related image
    Modular multilevel converter
  •  related image
    Induction motor
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    Speed sensor-less
  •  related image
    Low speed operations