Abstract
This article discusses the disadvantages of electric motor control systems for the running gear of mine self-propelled cars of the 5vs-15M brand used for transporting ore to conveyor transport at the Tyubegatan potash Deposit and analyzes the use of a control system with a frequency Converter. Based on the results of the analysis of the recommended possible options for the electric drive, it is advisable to conduct further studies of the electric drive based on an asynchronous motor and a power circuit of a frequency converter.
Highlights
IntroductionAt the mines of the Tyubegatan potash Deposit (Uzbekistan), wheeled self-propelled mine wagons (SPSW) are used to deliver the rock mass beaten off by a tunneling combine to ore outlets or directly to conveyor bunkers at distances of up to 200 meters
In difficult mining and technological conditions of the Tyubegatan potash salt Deposit, such as curvature, changes in slopes, as well as the lack of working platforms for maneuvers at the intersection of mine workings lead to some difficulties in controlling the movement of SPSW with existing relay-contactor control systems
The existing 5VS-15M SPSW electric drive is based on a three-speed asynchronous electric motor with a relay-contactor control system that provides a speed range of 1:3
Summary
At the mines of the Tyubegatan potash Deposit (Uzbekistan), wheeled self-propelled mine wagons (SPSW) are used to deliver the rock mass beaten off by a tunneling combine to ore outlets or directly to conveyor bunkers at distances of up to 200 meters. The existing 5VS-15M SPSW electric drive is based on a three-speed asynchronous electric motor with a relay-contactor control system that provides a speed range of 1:3. Shunting operations are performed at the I position of the switch, when the electric motor is running at a synchronous speed of 500 rpm (0.8 m / s), the driver makes direct switching on and off of the engine, up to 16 times per cycle, which causes difficulties in control, additional power consumption, overheating of the motor windings and wear of contact equipment [3]. On curved sections and structural fields, the SPSW driver performs 25 to 45 turns, switches and brakes of traction engines during loading and unloading, as well as movement from the bottom to the reloading point and back over a distance. Control of the electric drive, taking into account the reverse, is carried out by five contactors, which provides switching the speed of the engine running gear to 1500/1000/500 rpm. Reliability and smooth operation during maneuvering operations in complex mine workings, it is necessary to exclude relay-contactor control equipment and enter a new control system with the requirement of explosion safety in the existing control stations [2]
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