PERSPECTIVES OF USING ELECTROMECHANICAL TRANSMISSIONS IN AGRICULTURAL TRACTORS AND SELF- PROPELLED MACHINES Simion POPESCU, Ph.D, Professor Dan CIOROIANU, Eng., Ph.D Student, Vlad POPESCU, Ph.D, Lecturer Transilvania University of Braşov, Romania Rezumat. În lucrare sunt prezentate şi analizate posibilităţile de introducere a transmisiilor electromecanice la tractoarele agricole şi maşini agricole autopropulsate, având în vedere realizările obţinute până în prezent pe plan mondial. Se prezintă scheme structurale şi cinematice de transmisii electromecanice şi se face o comparaţie între transmisiile mecanice, hidrostatice şi electromecanice sub aspect tehnic şi economic. Cuvinte cheie: tractoare, combine de cereale, transmisii electromecanice ,randamente transmisie 1. INTRODUCTION The electromechanical transmission using on agricultural tractors represent a potential of innovation and theoretical and experimental research for products releasing with a higher functional and energetic parameters. In the last ten years the performances of the used electromechanical transmission on auto vehicles were continuous improved and their production costs were permanent less. Therefore, the changing of the actual mechanical or hydro-mechanical transmission with electromechanical one represents the tendency, which has to concerning of manufacturer of tractors and auto propelled machines (self-propelled combine). In the last years appeared few of the base solutions of the electromechanical transmission and a raw of their variants. From the done analyses over the achievements and research on the international plan lead toward a tendency of continuous reducing of the production costs of the electromechanical transmission face to the electromechanical transmission of the tractors, tracks and cars (fig.1). The reason of the production costs reducing explain through the price reducing of the electrical and electronic products, through the synergic effect released through the new tendencies from mechatronic and through the simplicity of mounting technology. The eventually disadvantages which appear through the increasing of the necessary volume to fit the components on the vehicle and through the increasing in a some