Fault-Tolerant Technique for Delta-Connected AC-Motor Drives

作者：Sayed Ahmed Ahmed^*; Mirafzal Behrooz; Demerdash Nabeel A O

来源：IEEE Transactions on Energy Conversion, 2011, 26(2): 646-653.

DOI：10.1109/TEC.2010.2088401

• Delta-connected stator windings
• ac-motor drives
• fault tolerant
• induction motor
• open-Delta
• stator failure
• stator fault mitigation
• stator unbalance
• torque pulsations
• volt-per-hertz (scalar) control method

A fault-tolerant technique for motor-drive systems is introduced in this paper. The technique is merely presented for ac motors with Delta-connected circuits in their stator windings. In this technique, the faulty phase is isolated by solid-state switches after the occurrence of a failure in one of the stator phases. Then, the fault-tolerant technique manages current-flow in the remaining healthy phases. This technique is to significantly mitigate torque pulsations, which are caused by an open-Delta configuration in the stator windings. The performance of the fault-tolerant technique was experimentally verified using a 5-hp 460-V induction motor-drive system and the results are presented in this paper.

• 出版日期2011-6