Introduction (mechanical power parameters, driving mechanism components, direction of power flow through a driving mechanism). Working device: basic demands and working resistance characteristic. Representing and surveying drive operation. Steady-state and transitive regimes of drive system operation. Defining the duration of transitive operating regimes. Standardised operating regimes of electric motor drives. Electric motors: types, rated parameters, characteristics, the field of intended use, mechanical characteristics. Altering the velocity of an electric motor drive and braking. Selection and verification of an electric motor for standardised operating regimes. Mechanical power transmitting devices: classification, basic characteristics (gear ratio, degree of utilisation, self braking etc.) relevant for the integration into the driving system of working machine. Relevant parameters for selection of a mechanical power transmitting device in the manufacturer’s catalogue. Examples of electric motor driving systems of typical working machines: adjusting and integration of driving system components, basic demands for control systems. Simulation of a machine driving system operation.