Design of a five‐phase permanent‐magnet motor for the electric steering of an aircraft nose landing gear

Abstract

Recently, there has been a growing interest in reducing the number or replacing the hydraulic/pneumatic actuators utilised on aircraft with electric actuators coupled to mechanical gears, which would improve the reliability and performance. This is involved in the concept of more electric aircraft. The electrification of actuators would affect the primary and secondary flight controls, as well as the movement of flight surfaces, retraction of the landing gear, and steering of the nose landing gear, which is also considered in this study. This study considers the design of a multiphase permanent-magnet (PM) motor to be utilised for the electric steering of a commercial aircraft nose landing gear. This multiphase motor would make it possible to achieve a highly reliable actuator and, coupled with a harmonic drive, avoid the use of a multi-motor configuration. Moreover, a multiphase motor would increase the power density and efficiency of the actuator, through improving the torque ripple. The performance variation due to temperature swings is considered, and a design procedure for the PM motor is described using the worse operation case for the electric actuator. The adequate performance of the designed motor and actuator is demonstrated by means of a finite element analysis.

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

“…Considering the electrical machine, PMSMs are suitable candidates for EMAs, due to their high power density and fault-tolerance capabilities [5][6][7]. Among the fault-tolerance PMSMs proposed in literature [8][9][10], those with two separate three-phase windings (also known as dual three-phase winding PMSMs) represent an attractive choice, due to the good compromise between fault-tolerance capability and standard PEC adoption [11][12][13].…”

Modeling and Investigation of a Turboprop Hybrid Electric Propulsion System

“…(1) High power density propulsion motor: due to the high power density and high efficiency, permanent magnet motors are the most suitable motors for the application; in order to increase the reliability, this motor can be realized in multiphase configurations [26]. The use of pitch control for the management of the propulsion power, gives the possibility to keep the angular…”

“…(1) High power density propulsion motor: due to the high power density and high efficiency, permanent magnet motors are the most suitable motors for the application; in order to increase the reliability, this motor can be realized in multiphase configurations [26]. The use of pitch control for the management of the propulsion power, gives the possibility to keep the angular speed practically constant and obtain a high value of efficiency; (2) DC-DC and DC-AC converters: the power converter chain is constituted by the DC-AC converters (typically a voltage source inverter) connected to the terminals of the electric motors [27].…”

Research on a Multi-Motor Coordinated Control Strategy Based on Fuzzy Ring Network Control

“…Speed feedback control and torque compensation were used for dual motor coordinated control [23]. The centralized coordinated control (DCC) strategy with multiple subsystems [24], multiple phases motor technology [25], communication topology modules to transmit motor position information [26], the torque distribution method [27]- [32], additional speed controllers [33], the adaptive sliding mode fault-tolerant coordination (ASM-FTC) control method [34], learning adaptive robust control [35] and the hierarchical network method [36] have been used for multi-motor coordinated control.…”