Adel DeriszadehOrkun KarabasogluSalih Baris OzturkDeriszadeh, AdelOzturk, Salih BarisKarabasoglu, Orkun2025-10-06201917554535, 175545431755-45351755-454310.1049/iet-pel.2019.00582-s2.0-85072672676https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072672676&doi=10.1049%2Fiet-pel.2019.0058&partnerID=40&md5=c6f9de5b908b1e314f2e7d09512f091chttps://gcris.yasar.edu.tr/handle/123456789/9377https://doi.org/10.1049/iet-pel.2019.0058An analytical model of excitation system of brushless wound-rotor synchronous starter generator for aircraft applications is developed and presented in this study. During engine start-up process the starter generator operates as a motor to start the aircraft turbine and to assist it up to the self-sustaining speed. On the basis of rotation speed of the starter generator in the engine start-up process there are three excitation modes for the exciter and two transient modes for the field current of the main generator (MG). In this study for each excitation mode the relationship between the excitation current (field current of the exciter) and the field current of MG is investigated by taking into account the influence of power electronic parts. This study also proposes a control method for the generator field current in all excitation modes which can detect optimum operating points for transition between excitation modes. Furthermore a seamless transient control strategy is proposed for the transient modes of the generator field current. Simulation and experimental results are provided to demonstrate the feasibility of the proposed solution. © 2019 Elsevier B.V. All rights reserved.Englishinfo:eu-repo/semantics/closedAccessAc Generator Motors, Aircraft, Engines, Starters, Synchronous Generators, Aircraft Applications, Aircraft Turbines, Excitation Currents, Excitation System, Operating Points, Seamless Transition, Starter Generators, Transient Controls, Power QualityAC generator motors, Aircraft, Engines, Starters, Synchronous generators, Aircraft applications, Aircraft turbines, Excitation currents, Excitation system, Operating points, Seamless transition, Starter generators, Transient controls, Power qualityMachine ControlExcitation SystemExcitation ModeAircraft TurbineAircraft ControlSeamless Transient Control StrategyElectric Current ControlPower ElectronicsSynchronous GeneratorsMain GeneratorBrushless MachinesExciterAircraft ApplicationsRotorsTurbinesExcitation CurrentSelf-Sustaining SpeedOptimum Operating Point DetectionGenerator Field CurrentSeamless TransitionsAerospace ComponentsTransient ModesControl MethodTransient AnalysisStartingEngine Start-up ProcessBrushless Wound-Rotor Synchronous Starter GeneratorArticle