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Variable-structure torque control of induction motors using space vector modulation

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Abstract

Compared with field orient control (FOC), direct torque control (DTC) is known to provide fast and robust response for induction motors. However, while offering high dynamic performance, classical DTC produces notable torque, flux, and current ripples, and operates with a variable inverter switching frequency. In this paper, a novel torque control scheme for induction motors is proposed. The stator flux and the electrical torque are directly controlled by variable-structure controllers, and stator voltage vectors calculated by the variable-structure controllers are applied to the motor by means of space vector modulation. The proposed scheme therefore provides smooth, fast and robust regulations of the electrical torque and the stator flux. Moreover, the implementation of the scheme is simple. Theoretical analysis shows the asymptotical convergence of electrical torque and stator flux tracking. Simulation and experimental results are provided to evaluate the performance of the proposed scheme.

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Authors and Affiliations

  1. Dept. of Automation, Tsinghua University, 100084, Bei**g, P. R. China

    Wang Huangang, Xu Wenli, Yang Geng & Li Jian

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  1. Wang Huangang
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  2. Xu Wenli
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  3. Yang Geng
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  4. Li Jian
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Correspondence to Wang Huangang.

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Huangang, W., Wenli, X., Geng, Y. et al. Variable-structure torque control of induction motors using space vector modulation. Electr Eng 87, 93–102 (2005). https://doi.org/10.1007/s00202-003-0224-0

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  • DOI: https://doi.org/10.1007/s00202-003-0224-0

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