Posted to News on 9th Mar 2008, 16:13
'Rightsize' modular drives deliver cost-effective functionality
Lenze is launching the new L-force 8400 range of frequency inverters that enable customers to select the modules and functions they require to create a cost-effective tailored 'Rightsize' drive. Initially available as single-phase models up to 2.2kW and three-phase up to 11kW, the range will rapidly expand into higher powers. As the inverters are part of the Lenze L-force portfolio, easy integration into Lenze control systems is assured.
The modular approach initially covers three designs. The Baseline is the entry-level model (0.25-2.2kW single-phase, 0.37-3.0kW three-phase) in terms of functionality and drive behaviour. This modern and all-purpose frequency inverter is said to be the inverter of choice when handling drive tasks with steady movement, as is the case with conveyor drives, pumps, blower and fans.
Next is the StateLine (0.25-2.2kW single-phase, 0.37-11kW three-phase), which is suitable for drive applications without speed feedback. It is expected to be used for machines and equipment that require networking across fieldbus systems. With integrated brake control, integrated PID, flying restart circuit and further features, the StateLine variant is useful for controlled movement.
When used in machines in which the inverter's mains supply is frequently switched on and off, the StateLine benefits from an integrated self-protection function that prevents the inverter from being damaged as a result of being switched on and off too frequently. This reduces the cost of incorporating additional monitoring functions within the machine.
The HighLine version (0.25-2.2kW single-phase, 0.37-11kW three-phase) - see photo - includes added functionality for more complex tasks. In particular, software is built in for positioning and indexing.
Plug-in memory module
All three versions have the same dimensions and fixings to aid panel design. Furthermore, all three feature a pluggable memory module that holds all the parameter settings. This feature enables programming to be carried out off-line, software to be updated easily, and it makes exchanging an inverter a simple task.
L-force engineer software at the entry level is free of charge and customers can opt for more powerful versions if they need the extra functionality. CANopen is integrated and other pluggable fieldbus modules are offered as optional extras for communicating on fieldbuses such as Profibus, Profinet, Ethernet Powerlink and EtherCAT.
Many more cost-saving features are available with the 8400 inverters such as Safe Torque Off (SIL3 to IEC 61508), operation with IT mains, integral RFI filter, and RoHS-compliance. Performance is claimed to be 'second to none', with 200 per cent overload capacity, very fast response, S-ramps and a 45degC ambient rating without derating. The modularity of the 8400 range, and the ability to match the drive to the need, leads to a 'Rightsize' selection that saves costs and optimises performance.
