692
− maintain the desired battery status by recording on-line actual battery capacity,
− improve operator’s safety by interacting with the battery management application.
2.6 Power supply system of roadheading mining machines
Roadheading machines are commonly used in the Polish coal mining industry, for activities
related to proper maintenance of the false floor in the roadway workings. They are self-running machines on a track electro-hydraulic drive chassis. During drilling, a hydraulic pump,
driven by an electric motor, powered by a drop-down cable is connected to the mine power
network. The disadvantage of this solution consists in a limited mobility and an exposure
of the cable to mechanical damages, so research work has been undertaken by KOMAG
(Polnik 2018) in cooperation with the mining machinery manufacturer HYDROTECH S.A.
to develop a drive system powered by batteries cell.
In order to increase machine operational availability, it is planned to power the machine
with electricity through so-called electric hybrids. It is a system based on wired network
power from the mine network and additionally on independent power supply from cell batteries. The machine works on battery power. When the battery is discharged, it is possible to
supply the machine from the mine network, thus continuing the work while simultaneously
charging the battery cells.
During the tests, a correct operation of the battery charging and discharging module as
well as the control and safety system were checked. In the result of these tests, no irregularities
were found. The current when charging cell batteries is 30 A, allowing to charge the battery in
about 3 hours, which fulfils technical and technological assumptions. The combined control
and safety system guarantees that every irregularity, created in the power module model is
detected and blocked by the developed security system. When the power module model did not
confirm a connection of the mobile machine’s electrical motor during testing, only the output
voltage and communication of the power electronic converter were verified during the tests.
2.7 Remote control mining system
Mining operations are deployed with sophisticated industrial controls and sensors for safety
and operational efficiency. These sites must work around the clock to be operationally efficient
and productive and must experience minimal downtime due to communication failures. At
severe environmental conditions underground, the networking of mining areas requires rugged, anti-vibration specifications of devices to ensure complete control of loading operations
while transferring data securely. KOMAG developed Bluester to meet these requirements.
The Bluester system (Fig. 3) is designed to control mining machines such as: locomotives,
suspended monorails, hoists. It has two important functions to improve the operator’s work
and improve safety: wireless control and control of security procedures application. The
combination of these two functions in one device is an innovative solution.
Figure 3. A view of Bluester system (Juszczyk et al. 2015).
− maintain the desired battery status by recording on-line actual battery capacity,
− improve operator’s safety by interacting with the battery management application.
2.6 Power supply system of roadheading mining machines
Roadheading machines are commonly used in the Polish coal mining industry, for activities
related to proper maintenance of the false floor in the roadway workings. They are self-running machines on a track electro-hydraulic drive chassis. During drilling, a hydraulic pump,
driven by an electric motor, powered by a drop-down cable is connected to the mine power
network. The disadvantage of this solution consists in a limited mobility and an exposure
of the cable to mechanical damages, so research work has been undertaken by KOMAG
(Polnik 2018) in cooperation with the mining machinery manufacturer HYDROTECH S.A.
to develop a drive system powered by batteries cell.
In order to increase machine operational availability, it is planned to power the machine
with electricity through so-called electric hybrids. It is a system based on wired network
power from the mine network and additionally on independent power supply from cell batteries. The machine works on battery power. When the battery is discharged, it is possible to
supply the machine from the mine network, thus continuing the work while simultaneously
charging the battery cells.
During the tests, a correct operation of the battery charging and discharging module as
well as the control and safety system were checked. In the result of these tests, no irregularities
were found. The current when charging cell batteries is 30 A, allowing to charge the battery in
about 3 hours, which fulfils technical and technological assumptions. The combined control
and safety system guarantees that every irregularity, created in the power module model is
detected and blocked by the developed security system. When the power module model did not
confirm a connection of the mobile machine’s electrical motor during testing, only the output
voltage and communication of the power electronic converter were verified during the tests.
2.7 Remote control mining system
Mining operations are deployed with sophisticated industrial controls and sensors for safety
and operational efficiency. These sites must work around the clock to be operationally efficient
and productive and must experience minimal downtime due to communication failures. At
severe environmental conditions underground, the networking of mining areas requires rugged, anti-vibration specifications of devices to ensure complete control of loading operations
while transferring data securely. KOMAG developed Bluester to meet these requirements.
The Bluester system (Fig. 3) is designed to control mining machines such as: locomotives,
suspended monorails, hoists. It has two important functions to improve the operator’s work
and improve safety: wireless control and control of security procedures application. The
combination of these two functions in one device is an innovative solution.
Figure 3. A view of Bluester system (Juszczyk et al. 2015).