In what the company says is the first of several planned extensions, Rockwell Automation has expanded the power range of its Allen-Bradley PowerFlex 755 AC drives to 700 hp (450 kW). According to Rockwell, the PowerFlex 755 AC drive’s modular design helps simplify replacement of drive components, such as cooling fans, circuit boards and major subassemblies.
This modularity also allows the drive’s converter and control pod to remain in the unit while the inverter is rolled out, so control wiring can remain connected. An additional advantage is the ability for the control pod in this drive to be mounted remotely for hassle-free access to low voltage control and diagnostics. Advanced diagnostic capabilities include indication of blown fuses and blown surge protectors. Monitoring and tracking of operating data on cooling fans, I/O relay cycles and motor run times also provides valuable data for preventive maintenance, helping to reduce unplanned downtime. The PowerFlex 755 drive comes equipped with an embedded Ethernet port and five option slots that allow users to tailor the drive to best suit their application, and now supports Rockwell Automation Integrated Motion, allowing it to be configured and controlled using motion profiles and instruction sets in an Allen-Bradley ControlLogix controller with Rockwell Software RSLogix 5000 software. According to the company, the ability to support variable frequency drives, motion drives, I/O, smart actuators and other Ethernet/IP-connected devices on a common network helps increase design flexibility, improve system performance and reduce engineering costs.