Whereas Koch's DC management systems are mainly used for peak shaving of voltage on the DC bus of servo and frequency inverters, there is now also the possibility of basing this also on current. An additional box on the Pxt modules is then attached to connection terminals, along with current measurement sensors for the three phases.
Additional load peaks are then not absorbed by increasing the load on the grid, but are provided by the active Pxt modules.
Now machines and devices that have been explained to the maximum peak load can be scaled much lower. This saves on more expensive connections, heavier switchgear and larger drive components. Standard rated current limits of, say, 32 or 63A may now be sufficient.
This assembly is available the size of a shoebox in 20A continuous at 2kJ of energy to multiples of 100As and Mega Joules of energy housed in a large control cabinet.
The function can be visualized in real time via the PxtTerminal tool, which is used for any parameterization and monitoring of the Pxt DC management system.
Optionally equipped with EtherCAT, PxtMX also enables integration into a fieldbus network.
When upgrading existing machines to a higher production rate or when machines are connected to weak power grids, the Pxt system in combination with the PxtMX module immediately proves its value.
