More Energy Efficiency, Less Variants
Individually tailored drive concepts based on the LogiDrive system solution from NORD DRIVESYSTEMS represent an optimal compromise between energy efficiency and reduction of variants. They prove to be particularly performing in major intralogistics projects for airports and parcel centres where a large number of drive units are installed.
Conveyor belts in intralogistics installations for airports, warehouses and parcel centres are often designed for the expected maximum load and with corresponding safety factors. This often results in drives that are oversized for the application. However, in real operation, such systems achieve the maximum load only with a small proportion of the conveyed items.
As a result of such design, the drives only operate in the inefficient partial load range for most of the time. With the LogiDrive concept, NORD counteracts this trend with a specific reduction of variants using modern synchronous motors. In comparison with conventional asynchronous technology, these have an improved energy consumption performance in the partial load and partial speed ranges. Therefore, they are more energy efficient in these operating points and also keep efficiencies at a high level, even in case of overdimensioning through a reduction of variants. This results in a low total cost of ownership (TCO).
Four out of five drive variants are not required
NORD frequency inverters can control the output speed via a frequency range of 25 to 100 Hz. Thanks to their high overload capacity modern synchronous motors have a single motor type that can be used instead of different motor sizes. Dependent on the performance requirement, it is operated by its inverter with different frequencies. As an example, in a NORD project for baggage transport at an airport with 700 drive units, the number of variants could be reduced by about 80%. Eight variants of the 11 used drive configurations related to a standard system solution, the NORD LogiDrive. Proven standard solutions are tested and can be safely used.
Cost reduction thanks to standardisation
The LogiDrive systems from NORD are highly efficient, extremely easy to maintain and install thanks to plugand- play technology, and result in a considerable reduction of spare part stocks during operation. The whole concept is designed for easy planning and commissioning. The standardised geared motor variants are specially designed for intralogistics, parcel logistics and airport technology, and are particularly suitable for reducing the number of variants. The compact design saves space and the lightweight aluminium housing enables weight savings of up to 25%. LogiDrive drive units comprise an IE4 synchronous motor with rated powers of up to 5.5 kW, a 2-stage helical bevel gear unit and a NORDAC LINK frequency inverter to be installed close to the motor. With class IE4 motor efficiency and system efficiency to class IES2, the drive units achieve excellent overall efficiencies – especially in the partial load and speed range.
A range of frequency inverters meeting intralogistics requirements
The NORDAC range of frequency inverters includes new control cabinet inverters as well as decentralised frequency inverters, which have proven themselves particularly in intralogistics. Namely the NORDAC LINK Field Distribution System (FDS) raises functional ranges and interface options to a new level. These frequency inverters are available in three sizes (0.75 kW, 3.0 kW and 7.5 kW) and as motor starters. They are flexible in configuration and function, freely configurable according to requirements and applications, and compatible with all common bus systems. In combination with an energy-efficient synchronous motor and a 2-stage helical bevel gear unit they constitute the LogiDrive concept and the basis for efficient and tailor-made drive solutions in intralogistics applications.