APPLICATION OF RECEIVABLE DYNAMIC BRAKING TO INCREASE THE PRODUCTIVITY OF A LIFTING SKIP INSTALLATION

The work solves an actual technical problem — increasing the productivity of the mine skip installation by shifting the lift cycle of the skip loading. The aim of the work is to provide a theoretical and experimental study of the electric drive according to the scheme of the asynchronous valve cascade (AVK) to reduce the cycle time of the lifting skip installation. 
The task of the work is the development of an economical electric drive according to the scheme of an asynchronous valve cascade for mine skip lifting installations. To increase the productivity of the lifting installation, an automated electric drive according to the scheme of an asynchronous valve cascade is proposed. Calculated and constructed static and mechanical characteristics of the cascade for engine and regenerative braking modes. The structural diagram of the cascade is given, on the basis of which the speed diagram is constructed. Industrial tests of the electric drive according to the cascade scheme were carried out on an operating mine skip unit. It is proven that the proposed scheme will ensure a reduction in the lifting cycle time of the skip installation and an increase in productivity by 3...5 %. 
The developed electric drive system is recommended for the modernization of existing mine skip lifting installations equipped with a relay-contactor control scheme.