Hydraulic machinery

Electrical engineering

Physics

Geology

Control engineering

Finite element method

Torque

Aerospace engineering

Automotive engineering

Organic chemistry

Compensation (psychology)

Dual (grammatical number)

Structural engineering

Literature

Psychoanalysis

Engineering

Actuator

Psychology

Power (physics)

Seismology

Aerospace

Fault (geology)

Chemistry

Landing gear

Computer science

Phase (matter)

Quantum mechanics

Reliability (semiconductor)

Mechanical engineering

Thermodynamics

On modern rotorcraft, electro-mechanical actuators (EMAs) are progressively replacing the bulky and more expensive hydraulic and/or pneumatic systems. Although the migration towards alternative actuation solutions, reliability remains a key requirement for aerospace applications. Fault-tolerant electrical machines are often employed for ensuring the demanded reliability level. In this paper, the design of a dual three-phase winding permanent magnet synchronous machine (PMSM) for helicopter nose landing gear extension/retraction EMA is addressed. Finite element (FE) simulations are used for evaluating the PMSM performance in both healthy and faulty conditions. The compensation strategy implemented on the healthy three-phase winding, while the second one is completely shorted, is also discussed. Finally, a purposely built dual three-phase winding PMSM model is implemented in Dymola environment, where the extension/retraction EMA is simulated. Hence, EMA behaviour under both healthy and faulty conditions is analysed.

Design of Fault-Tolerant Dual Three-Phase Winding PMSM for Helicopter Landing Gear EMA