Magnetically Geared Pseudo Direct Drive for Safety Critical Applications

This paper presents an investigation into the electromagnetic design and performance of a fault-tolerant (FT) magnetically geared pseudo-direct-drive (PDD) electrical machine for primary flight control surface electromechanical actuation. It is shown that a large number of combinations of high-speed...

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Bibliographic Details
Published inIEEE transactions on industry applications Vol. 55; no. 2; pp. 1239 - 1249
Main Authors Dragan, Radu Stefan, Clark, Richard E., Hussain, Essam Khalaf, Atallah, Kais, Odavic, Milijana
Format Journal Article
LanguageEnglish
Published New York IEEE 01.03.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Actuation
Actuators
Aerospace
brushless machine
Control surfaces
Fault tolerance
Fault tolerant systems
Flight control
Gears
magnetic gear (MG)
Product design
Rotors
Safety critical
Stator windings
Torque
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Summary:This paper presents an investigation into the electromagnetic design and performance of a fault-tolerant (FT) magnetically geared pseudo-direct-drive (PDD) electrical machine for primary flight control surface electromechanical actuation. It is shown that a large number of combinations of high-speed rotor pole pairs, pole-piece numbers, and stator slot numbers exist, for which a duplex three-phase FT configuration can be realized. Furthermore, in addition to facilitating a lower mass solution, it is also shown that a PDD presents a significantly lower inertia referred to the screw when compared to direct-drive or mechanically geared motor solutions. The findings are validated on a prototype PDD, which has been designed and built to meet the requirements of a primary control surface electromechanical actuator.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2018.2873511