Control of Open-Loop PWM Delta-Connected Motor-Drive Systems under One Phase Failure Condition

Ahmed Sayed-Ahmed; Nabeel A. O. Demerdash

Control of Open-Loop PWM Delta-Connected Motor-Drive Systems under One Phase Failure Condition

Ahmed Sayed-Ahmed

Nabeel A. O. Demerdash

Vol. 11, No. 6, pp. 824-836, Nov. 2011

10.6113/JPE.2011.11.6.824

Delta-connected motors

Fault mitigation

Fault-tolerant motor-drive systems

Robust control

Open-loop control

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Abstract

A new fault-tolerant control topology for open-loop motor-drive systems with Delta-connected stator windings is introduced in this paper. This new control topology enables the operation of a three-phase induction machine as a two-phase machine fed by a three-phase inverter upon a failure in one of the motor phases. This topology utilizes the “open-Delta” configuration to independently control the current in each of the two remaining healthy phases. This new control technique leads to the alleviation of any torque pulsations resulting from the consequences of the asymmetrical conditions associated with this class of faults.

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Cite this article

[IEEE Style]

A. Sayed-Ahmed and N. A. O. Demerdash, "Control of Open-Loop PWM Delta-Connected Motor-Drive Systems under One Phase Failure Condition," Journal of Power Electronics, vol. 11, no. 6, pp. 824-836, 2011. DOI: 10.6113/JPE.2011.11.6.824.

[ACM Style]

Ahmed Sayed-Ahmed and Nabeel A. O. Demerdash. 2011. Control of Open-Loop PWM Delta-Connected Motor-Drive Systems under One Phase Failure Condition. Journal of Power Electronics, 11, 6, (2011), 824-836. DOI: 10.6113/JPE.2011.11.6.824.