### Abstract

One of the main advantages of multiphase induction machines is their higher fault-tolerant capability. Under phase(s) loss, the machine currents can be optimally controlled to satisfy certain optimization criteria. In this paper, a simple open loop controller based on the conventional V/f control scheme of a five-phase induction machine is introduced which can ensure equal phase currents and minimum torque ripples under one phase open. The presented approach can be extended to any number of phases with any number of open phases. The fundamental dq components of the stator voltage are decided as in conventional V/f control. The measured currents are decomposed to their sequence components. The fundamental sequence is used to calculate the optimum reference third sequence current components that ensure equal stator currents under phase(s) open. The third sequence stator voltage components, that ensure equal remaining phase currents, are obtained using Proportional-Resonant (PR) controllers. The input errors of these controllers represent the difference between the actual third sequence current components and its optimum reference values. A prototype five-phase machine is used for experimental verification.

Original language | English |
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Title of host publication | 2013 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013 |

Pages | 1170-1176 |

Number of pages | 7 |

DOIs | |

Publication status | Published - 2013 |

Event | 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013 - Long Beach, CA, United States Duration: 17 Mar 2013 → 21 Mar 2013 |

### Other

Other | 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013 |
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Country | United States |

City | Long Beach, CA |

Period | 17/3/13 → 21/3/13 |

### Fingerprint

### ASJC Scopus subject areas

- Electrical and Electronic Engineering

### Cite this

*2013 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013*(pp. 1170-1176). [6520447] https://doi.org/10.1109/APEC.2013.6520447

**Open loop V/f control of multiphase induction machine under open-circuit phase faults.** / Morsy, Ahmed S.; Abdel-Khalik, Ayman; Abbas, Ahmed; Ahmed, Shehab; Massoud, Ahmed.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*2013 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013.*, 6520447, pp. 1170-1176, 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013, Long Beach, CA, United States, 17/3/13. https://doi.org/10.1109/APEC.2013.6520447

}

TY - GEN

T1 - Open loop V/f control of multiphase induction machine under open-circuit phase faults

AU - Morsy, Ahmed S.

AU - Abdel-Khalik, Ayman

AU - Abbas, Ahmed

AU - Ahmed, Shehab

AU - Massoud, Ahmed

PY - 2013

Y1 - 2013

N2 - One of the main advantages of multiphase induction machines is their higher fault-tolerant capability. Under phase(s) loss, the machine currents can be optimally controlled to satisfy certain optimization criteria. In this paper, a simple open loop controller based on the conventional V/f control scheme of a five-phase induction machine is introduced which can ensure equal phase currents and minimum torque ripples under one phase open. The presented approach can be extended to any number of phases with any number of open phases. The fundamental dq components of the stator voltage are decided as in conventional V/f control. The measured currents are decomposed to their sequence components. The fundamental sequence is used to calculate the optimum reference third sequence current components that ensure equal stator currents under phase(s) open. The third sequence stator voltage components, that ensure equal remaining phase currents, are obtained using Proportional-Resonant (PR) controllers. The input errors of these controllers represent the difference between the actual third sequence current components and its optimum reference values. A prototype five-phase machine is used for experimental verification.

AB - One of the main advantages of multiphase induction machines is their higher fault-tolerant capability. Under phase(s) loss, the machine currents can be optimally controlled to satisfy certain optimization criteria. In this paper, a simple open loop controller based on the conventional V/f control scheme of a five-phase induction machine is introduced which can ensure equal phase currents and minimum torque ripples under one phase open. The presented approach can be extended to any number of phases with any number of open phases. The fundamental dq components of the stator voltage are decided as in conventional V/f control. The measured currents are decomposed to their sequence components. The fundamental sequence is used to calculate the optimum reference third sequence current components that ensure equal stator currents under phase(s) open. The third sequence stator voltage components, that ensure equal remaining phase currents, are obtained using Proportional-Resonant (PR) controllers. The input errors of these controllers represent the difference between the actual third sequence current components and its optimum reference values. A prototype five-phase machine is used for experimental verification.

UR - http://www.scopus.com/inward/record.url?scp=84879349919&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879349919&partnerID=8YFLogxK

U2 - 10.1109/APEC.2013.6520447

DO - 10.1109/APEC.2013.6520447

M3 - Conference contribution

AN - SCOPUS:84879349919

SN - 9781467343541

SP - 1170

EP - 1176

BT - 2013 28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013

ER -