A novel direct torque control scheme for a sensorless five-phase induction motor drive

Zheng, L. and Fletcher, J.E. and Williams, B.W. and He, X. (2011) A novel direct torque control scheme for a sensorless five-phase induction motor drive. IEEE Transactions on Industrial Electronics, 58 (2). pp. 503-513. ISSN 0278-0046

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Abstract

Direct torque control is a variable-structure control strategy with simplicity, fast response, and tolerance to motor parameter variation, which provides direct control of stator flux and electromagnetic torque by optimally selecting the inverter states in each sampling period. For five-phase drives, the increased number of voltage vectors offers greater flexibility in optimizing the selection of the inverter states, thereby accomplishing more precise control of the stator flux and torque. Nevertheless, the large number of inverter states means that a more elaborate and complex selection criterion is needed. The following two aspects, which are not issues for three-phase drives, are taken into account in designing switching-table-based direct torque control for five-phase drives. First, the low-frequency harmonic currents due to the auxiliary vector plane need to be eliminated. Second, full utilization of the dc-link voltage is desired. A novel switching-table-based direct torque controller fulfilling these objectives is proposed and is combined with a speed-adaptive variable-structure observer. Experimental results substantiate the effectiveness of the proposed sensorless direct torque controller.

Creators(s): Zheng, L., Fletcher, J.E., Williams, B.W. and He, X.;
Item type:Article
ID code:14674
Keywords:direct torque control scheme , industrial electronics, sensors, motor drives, Electrical engineering. Electronics Nuclear engineering, Control and Systems Engineering, Computer Science Applications, Electrical and Electronic Engineering
Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
Department:Faculty of Engineering > Electronic and Electrical Engineering
Depositing user: Strathprints Administrator
Date deposited:01 Jun 2011 13:14
Last modified:25 Sep 2020 03:54
URI:https://strathprints.strath.ac.uk/id/eprint/14674
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