DRIVE FOR ELECTRIC accountability mechanisms

摘要

The invention relates to the field of controlled electric drive and may be used in electric drives of mechanisms responsible continuous, process conditions which do not allow unscheduled stoppages during short power disturbances. Task - to improve the reliability of smooth operation of the actuator. The problem is solved in that the known frequency converter is further provided with a reversible voltage three-phase bridge rectifier 12 which comprises a six-transistor diode keys 13, 14, 15, 16, 17, 18 and a filter capacitor 19 connected to the positive and negative terminals of the rectifier 12. When this three-phase terminals of said rectifier 12, connected to the secondary winding of the booster transformer 7, its positive and negative terminals connected to respective terminals of the capacitive filter 3 and the controlled rectifier inputs 12 n dklyucheny to the output control unit 11. The inventive device improves the reliability of smooth operation of the drive mechanisms responsible for oscillations to voltage supply inputs due to the expansion of the control range, as in the downward and upward of the input voltage of the main and backup rectifier ensuring their uniform loading current with high accuracy. This allows the inverter voltage power simultaneously from the primary and backup rectifier, both in the working and emergency modes. Furthermore, the inventive frequency converter can reduce resource consumption actuator by reducing the amount of booster transformers and voltage regulators. 4 yl.