NORD DRIVESYSTEMS has introduced a modular drive system combining decentralized frequency inverters with asynchronous IE3 and synchronous IE5+ motors, addressing integration challenges in intralogistics applications. The system centers on the NORDAC ON (0.37-3.7 kW, wall or motor mounting) and NORDAC LINK (0.37-7.5 kW, wall mounting) frequency inverters, which now feature identical communication and safety functionality.
Both inverters integrate onboard Ethernet with PROFINET and EtherCAT compatibility, enabling direct connection to industrial automation networks. Safety integration is achieved through PROFIsafe or FSoE protocols, with an extended functional safety package including STO and SS1-t (SIL3/PLe), plus SS1-r, SLS, SMS, and SSM (SIL2/PLd). Safe digital inputs and outputs allow direct connection of fail-safe peripherals such as emergency stops and photoelectric sensors without additional safety relays.
Encoderless Motor Control
The system of NORD employs CFC open-loop injection control for synchronous IE5+ motors, eliminating encoder requirements while maintaining dynamic performance. This injection-based vector control method determines rotor position by injecting current signals into the motor windings and analyzing the resulting feedback. The control method enables 150% overload capacity during start-up and supports short ramp times for dynamic acceleration requirements. Energy efficiency is optimized particularly in partial load ranges, while material and installation costs are reduced through encoder elimination.
System Architecture Benefits
The standardized functionality across both inverter variants allows system designers to select wall-mounted or motor-mounted configurations without altering communication infrastructure or safety integration. Integrated functions reduce wiring requirements compared to systems requiring separate safety modules or communication adapters. The modular approach targets intralogistics applications in e-commerce facilities, parcel distribution centers, and airport baggage handling systems where decentralized drive placement offers space advantages.
