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http://dx.doi.org/10.6113/JPE.2011.11.6.824

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

Sayed-Ahmed, Ahmed (Standard Drives Group, Rockwell Automation)
Demerdash, Nabeel A.O. (Dept. of Electrical Engineering, Marquette University)
Publication Information
Journal of Power Electronics / v.11, no.6, 2011 , pp. 824-836 More about this Journal
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.
Keywords
Delta-connected motors; Fault mitigation; Fault-tolerant motor-drive systems; Robust control; Open-loop control;
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