Abstarct: Abstract The main objective of this research is to introduce and electromagnetic design of an axial-flux hybrid-excitation machine (AFHEM) with two rotors capable of independent motion for use in small-scale variable-speed wind energy conversion systems, along with modeling and performance evaluation. The proposed hybrid generator with a disc-shaped design consists of a stator in the center and two wound rotors on its sides, each of the rotors has the ability to rotate independently and also has the ability to be supplied separately in a wide range of amplitude and frequency through dedicated power converters. The proposed generator is designed in such a way that it is suitable for use in single-rotor and dual-rotor co-rotating and contra-rotating wind microturbines in the speed range of less than 1000 rpm. Due to the presence of a variable voltage and frequency power supply in the circuit of each rotor, the proposed system can maintain the stator voltage and frequency at constant value in both grid-connected and stand-alone states, despite the difference in the speed and direction of rotation of the rotors, without the need for a power converter in the stator circuit. The steps of the generator's dimensional and functional design and optimization process are presented in detail in this thesis, and its steady-state performance evaluation in synchronous, super-synchronous, and sub-synchronous operating conditions is described through analytical models and finite element simulations. The results indicate the desirable performance of the generator over a wide speed range, especially in super-synchronous operating conditions.