Abstract
As a result of the executed researches of the generating modes of the thyristor electric drive for the ground ropeways, winches of drilling rigs and other equipment with the sign-variable moment of loading was determined that the mode of recuperative braking could be realized only in case of great and average values of the electromotor speed in difference from the electric drive of a direct current in case of power supply from an ideal source of a direct current.The technical solution which excludes unstable operation modes in the countercurrent mode at small speeds was offered and it automatically provides a choice of the necessary generating mode of a recuperation or a countercurrent.Theoretical researches of the emergency braking modes connected to blackout, the need of implementation of which is caused by safety regulations which impose strict requirements to the brake way length of the main mining equipment were executed.The technical solution on the basis of the dynamic braking system with the shunting diode connected parallel to the engine drive winding is developed that allows to use the energy accumulated in the drive winding for implementation of the mode of emergency braking.