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Utaikaifa, Kasem (2011) Torque ripple reduction in DTC of singlephase opencircuit fault PM brushless. In: (2011) Proceedings 2nd International Conference on Engineering and Industries.


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This paper presents a strategy to reduce torque ripple in direct torque control (DTC) of threephase permanent magnet brushless (PMBL) motor having a winding opencircuit fault. An extra inverter leg is employed to supply voltage to motor neutral point during post fault operation. The zerovoltage vectors are utilized to reduce the torque ripple. Mathematic model of nonsinusoidal backEMF PMBL motor is developed in which stator flux linkages and developed torque of the faulty motor are presented in a series function. To avoid the difficulty in variable estimation approximated models of stator flux linkages and developed torque based on fundamental component are established. Design of the proposed DTC is also described. The computer simulation shows that torque ripple can be reduced by the proposed method where zerovoltage vectors are utilized in the control scheme. Performances of the system with and without zerovoltage vectors in the scheme are presented and then validated by comparing with measured signals.

Item Type: Conference or Workshop Item (Lecture)
Subjects: Engineering > Electrical and Energy Engineering
Divisions: Research Center > Research Support Office
Depositing User: Miss Niramol Sudkhanung
Date Deposited: 19 Oct 2016 04:01
Last Modified: 19 Oct 2016 04:01
URI: http://eprints.utcc.ac.th/id/eprint/5747

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