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Among renewable energies the solution of utilizing wind energy conversion systems is now in a growing trend. A valid choice for operation of such systems may be the use of the induction machine. This study presents modeling and simulation of a stand-alone induction drive with application to a small wind turbine generator system. The model of the induction machine is written in terms of fluxes as state variables and is used to design an estimator model that can provide the correct feedback signals for the vector control of a wind energy conversion system. The estimation of magnetic flux and electromagnetic torque is based on stator currents and stator voltages. Simulation results are provided indicating good estimator design and operation.