Title :
Fault-tolerant PM brushless DC drive for aerospace application
Author :
Villani, M. ; Tursini, M. ; Fabri, G. ; Castellini, L.
Author_Institution :
Dept. of Electr. & Inf. Eng., Univ. of L´´Aquila, L´´Aquila, Italy
Abstract :
Reliability is a fundamental requirement in airborne equipments, it involves a particular approach of study on mission failure probabilities. Architectures robust to failure of single components like multi-phase fault-tolerant motors drives introduce in these systems an intrinsic improvement. By providing compensation for potential hardware failures, a fault-tolerant design approach may achieve reliability objectives without recourse to non-optimized redundancy or over-sizing. A fault-tolerant design approach differs from a pure design redundancy approach in that provisions are made for planned degraded modes of operation where acceptable. This study shows how a 5-phase motor is able to run at rated torque also with one or two phase open, by using suitable current commands defined as degraded modes. An experimental prototype has been arranged and tested.
Keywords :
DC motor drives; aerospace engineering; brushless DC motors; electric actuators; fault tolerance; redundancy; reliability; 5-phase motor; aerospace application; airborne equipment; fault-tolerant PM brushless DC drive; mission failure probability; multiphase fault-tolerant motor drive; nonoptimized redundancy; over-sizing; reliability; Brushless motors; Circuit faults; Fault tolerance; Fault tolerant systems; Permanent magnet motors; Rotors; Torque; AC motor drives; aerospace engineering; fault-tolerant machines; finite element analysis; permanent-magnet (PM) motors;
Conference_Titel :
Electrical Machines (ICEM), 2010 XIX International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4174-7
Electronic_ISBN :
978-1-4244-4175-4
DOI :
10.1109/ICELMACH.2010.5608295