Allen-Bradley PowerFlex 755 AC drives to 900 kW

Rockwell Automation has extended the power range of its Allen-Bradley PowerFlex 755 AC drives to 900 kW and added 690 V ratings. The new drives are suitable for a variety of heavy industrial applications and provide users with increased application flexibility, advanced diagnostics and a common DC bus option.

The common DC bus option allows users to connect the AC drive to a common DC bus configuration, which takes advantage of different drive cycles to share energy. In this configuration, a DC bus acts as a common energy source that feeds energy from a generating load to a motoring load. Managing energy from a shared source increases overall system performance and reduces losses - ultimately improving the application’s energy efficiency.

This latest frame size includes an embedded ethernet port and five option slots, so users can tailor it to their application. Option modules include I/O, feedback, safety, additional communications and an auxiliary power supply. A convenient rollout design allows easy access to the drive for fast installation and maintenance. The drive’s converter and control pod can remain in the unit while the inverter is rolled out, so control wiring can remain connected.

In addition to the extended power range, a firmware upgrade for all PowerFlex 755 drives will include interior permanent magnet motor control and a ‘stop dwell’ feature to help prevent a motor from coasting to a stop.