DC drive governed via Siemens Simoreg converter Detailed description of mathematical model of separately excited DC motor, by which dynamic behavior of such system is fully described is a part of this masters thesis. Simulation data is gat- hered on basis of carrying out measurements and experiments, and are used for parametrisation of current and angular velocity of the motor via magnitude and symmetrical optimum. Simula- tions of nonregulated and regulated and measurements for DC motor are made, whose results are then compared. Regulation device Siemens Simoreg operation is functionally described, and technical documentation is made. Using the simulations and measurements, conclusions are made why to govern the operation of one DC motor.