09 August 2011
The new version 3.0 of the Lenze Drive Solutions Designer (DSD) is able to analyse motion profiles from simple point-to-point to complex cam profiles or dynamic reversing. Multiple axes can be evaluated on the same timescale using inverter drives, servo drives or a mixture of both. The energy cost at each element of the drive, for example the inverter, the motor, the gearbox can be analysed, making energy consumption from the different system elements more transparent. Large amounts of energy are often wasted with oversized drives, as designers will tend to overspecify to add service factors. The result can be excessive inertias and motors running inefficiently at partial loads. The Lenze DSD 3.0 makes it easier to accurately size the drive. The DSD 3.0 also makes it possible to determine and analyse the total energy requirement including lifetime costs with screen graphics showing the losses at each element in the drive train. Calculating the energy effects from connecting the DC bus across a series of drives is also a simple task for the optimization software. The DC bus shares the energy and one result may be that supply components can be dimensioned smaller reducing both energy consumption and purchase cost. In a typical application the system would be used to compare the running costs of IE1 and IE2 motors, and evaluate the extra savings from Lenze VFC eco software that is standard in series 8400 inverters. Similarly, it is possible to calculate the cost savings from adding a mains regeneration unit that recycles braking energy. A more complex example of drive optimisation is to compare the performance of an inverter-based to a servo-based drive system in a positioning application.
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