Deriszadeh, AdelKarabasoglu, OrkunOzturk, Salih Baris2024-05-252024-05-25201951755-45351755-454310.1049/iet-pel.2019.00582-s2.0-85072672676https://doi.org/10.1049/iet-pel.2019.0058https://hdl.handle.net/20.500.14517/1376Ozturk, Salih B/0000-0001-8322-4066; Deriszadeh, Adel/0000-0002-9100-1978An 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.eninfo:eu-repo/semantics/closedAccessrotorssynchronous generatorspower electronicsmachine controlstartingbrushless machinesturbinesaerospace componentsaircraft controlelectric current controltransient analysisbrushless wound-rotor synchronous starter generatorexcitation systemexcitation modeexcitertransient modesmain generatorexcitation currentgenerator field currentaircraft applicationsengine start-up processaircraft turbineself-sustaining speedpower electronicscontrol methodoptimum operating point detectionseamless transient control strategyseamless transitionsArticleQ3Q2121128732883WOS:000487805700018