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Hybrid solutions for decentralised control concepts (D526)

29 March 2016

Nord Drivesystems will demonstrate two smart control solutions for synchronous and asynchronous motors utilising SK 200E series frequency inverters.

These are technological leaders in the field of decentralised drive electronics due to their integrated positioning function, high overload capacity and large power range (0.25kW to 22kW). 

The flexibility of these drive units is demonstrated in large systems with a central automation concept. They can be controlled via a field bus or Industrial Ethernet, but can also be disconnected from the central control system by means of a switch, for example for maintenance purposes. In this case, the PLC which is integrated in the frequency inverter takes over and carries out other functions such as positioning. In this way, even in case of an unscheduled, sudden disconnection from the higher level control system, an SK 200E can keep important process stages in operation autonomously in order to limit interruptions to production.

Thanks to the PLC functionality, applications close to the drive unit, which are normally assigned to the central machine control system, including sequence control can be completely implemented in the drive unit. A second exhibit shows a drive unit which can, for example be used for pumps. This detects blockages and responds to these independently by attempting to free the blockage by changing the speed and direction of rotation. If the drive unit is able to free the blockage, it then resumes normal operation. Otherwise, it sends an error message to the control level. In customer applications this could for instance, enable a bypass.

Nord Drivesystems will be also be showcasing a large fully functional conveyor technology demonstration rig that brings together a selection of its geared motors and decentralised frequency inverters and starters that are well proven for materials handling applications in packaging machinery and logistics industries such as baggage handling.

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