Drive technology
TQ-Group announces its own servo inverters
The TQ Group, based in Seefeld near Munich, has announced that it will be launching its own servo inverter technology under the RoboDrive brand at the end of 2016.
The planned, universally applicable SDB-40-100 low-voltage inverter will for the first time make it possible to exploit the full dynamic potential of RoboDrive motors and thus, for example, optimize process cycle times and perfect synchronization characteristics. The inverter supports all standard sensor types and fieldbuses. In addition, TQ has paid particular attention to the fact that all axes can be synchronized in the nanosecond range, even in networks with a three-digit number of participants.
According to the manufacturer, the TQ computing module enables all control loops to be clocked at 100 kHz without exception. This would make it possible, for example, to modulate Beethoven's 9th Symphony in clear D minor using the current controller. In terms of drive technology, the control dynamics are sufficient to operate motors at speeds of up to 600,000 rpm with clean sine commutation.
The enormous speed dynamics can be seen in a speed inversion from negative to positive maximum speed, which takes place so quickly that it is not visually perceptible. This inversion means a speed change of more than 50,000 rpm in just under 10 milliseconds, so that the resulting jerk of the rotor, which weighs just 8 grams, can be felt very clearly with the human hand.
With the extraordinarily short controller clocks, TQ has taken the necessary step to make classic oscilloscopes superfluous during commissioning. In addition to the usual status variables, digital data logging also makes all internal controller variables available directly on the PC with a time resolution of 100 kHz.
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