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This paper presents the design and test results for a dual-lane fault-tolerant PM motor for a safety critical aircraft actuator. Motor topology has been chosen to meet the system availability and reliability criterion considering principal faults that can occur within the motor including winding open circuit, line to line and phase to ground short circuits. The motor has two 3-phase windings which...
For a permanent magnet (PM) motor used in an electro-hydrostatic actuation system, fluid drag loss in the air gap can be as high as 60% of motor internal losses and affects the motor efficiency; especially at low temperatures where the viscosity of the hydraulic fluid increases significantly. A PM motor has been designed and built to assess electromagnetic, fluid drag loss and dynamic performance...
This paper discusses the design of a brushless permanent magnet motor in which the performance requirement is dominated by breakout torque. It discusses the impact of a rotor position feedback error and how it affects the machine sizing in order to overcome breakout torque requirements. It is shown that the brushless AC drive is less sensitive to the position error compared with the brushless DC drive,...
This paper considers the operation and control of a brushless AC prototype embedded aircraft generator that has been designed for use as an alternative to the emergency run air turbine. To meet the wide operating speed requirements, the generator utilizes a hybrid rotor construction comprising permanent magnet and variable reluctance sections. The constant current source characteristics of the design...
This paper describes the thermal modeling of a brushless dc motor and brake solenoid for electro-mechanical actuators developed for a prototype more electric aircraft engine. Lumped-parameter thermal circuits were modeled using a commercial package for the motor. An in-house tool was used to model the transient behavior of the solenoid, which was solved using the SimPowerSystems toolbox of Simulinkreg...
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