Abstract
Paper deals with the use of an induction machine in the role of a generator. Such an operational mode is called a self-excited induction generator SEIG. It does not require an external power source to create the excitation field, as is the case with traditional synchronous generators. Therefore, it is widely used in power plants with renewable energy as a primary source (wind, water, etc). However, in terms of possible regulation and control of the electrical properties, the excitation process is extremely important. A mathematical model and simulation in Matlab are introduced. The excitation process was experimentally investigated in the laboratory of electric drives and the results are correlated with the expectations.