This project was divided into 4 stages. In the first one a study of the experimental modules of some frequency converters is carried out. In the second the converter was designed and the respective calculations were made. In the third one the experimental module was built (construction of the design of the frequency-voltage converter by applying a generator and an encoder that allow the rpm analysis of an engine). In the last one, the theoretical and practical values of the motor were analyzed for validation and to determine its transfer equation.