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Vol. 160, Issue 12, December 2013, pp. 556-562




Fault-Tolerant Algorithm Based on Decoupled Space-Vector for Dual Three-Level Inverter-Fed Induction Motor Drive
Di WU, Liangcheng SU, Xiaojie WU, Peng DAI

School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, 221008, China
E-mail: diablowudy@163.com


Received: 18 September 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems


Abstract: The dual inverter topology has the advantages of higher output voltage; more output levels and well tolerance performance. In this paper, a five-level SVPWM method with fault-tolerant control was proposed for dual three-level Inverter-fed Induction motor drive. In order to meets system requirement, decoupling space-vector ideological is used. A simplified algorithm is suggested to calculate the corresponding switching times, which only use the three-phase voltages and switching period. Also this scheme does not employ any look-up table, thus obviating the need for the sector identification. In order to improve the harmonic characteristics of output voltage and current, the balance control factor was regulated properly. The simulation and experimental results show that by using the proposed method, the fault-tolerant requirement can be met, running time of program reduced and the harmonics performance of output voltage and current improved effectively.


Keywords: Open-end winding induction motor, Dual inverter-fed topology, Fault-tolerant algorithm, Simplified algorithm, Quasi circular locus.


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