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Improvement of dynamic performance for the direct torque controlled induction motor system fed by a three-level inverter

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3 Author(s)
Hongmei Li ; Dept. of Electr. Eng., Hefei Univ. of Technol., Hefei, China ; Jian Wang ; Xiaochen Wang

Higher dv/dt and neutral point voltage floating often occur at the common three-level inverter, therefore, the modified modulate strategy is first studied for an induction motor system (IM) fed by a three-level inverter to implement direct torque control (DTC), and then the SIMULINK model is set up for the direct torque controlled induction motor system fed by the modified three-level inverter's modulate strategy. Simulation results show that the modified modulate strategy can not only overcome the shortage of neutral point voltage floating and higher dv/dt in the common three-level inverter, but also reduce the torque ripple, therefore, improve the dynamic performance of a direct torque controlled IM system markedly.

Published in:

Industrial Electronics and Applications (ICIEA), 2010 the 5th IEEE Conference on

Date of Conference:

15-17 June 2010

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