Allen-Bradley 900 kW PowerFlex 755 AC drives

Rockwell Automation has extended the power range of its Allen-Bradley PowerFlex 755 AC drives to 900 kW and added 600/690 V ratings. The new drives, designed for use in heavy industrial processes, provide users with increased flexibility, advanced diagnostics and a common DC bus option.

The PowerFlex 755 is designed for applications ranging from simple variable speed and variable torque control to demanding systems requiring constant torque control. Applications include fans, pumps, mixers, compressors, conveyors and extruders. Like other PowerFlex 755 drives, this latest frame size includes an embedded ethernet port and five option slots so that users can tailor it to their requirements. Optional modules include I/O feedback, safety, additional communications and an auxiliary power supply.

A 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, ensuring that control wiring remains connected.

In addition to the extended power range, a firmware upgrade for PowerFlex 755 drives will contain Interior Magnet Motor Control, which delivers increased application flexibility and high-energy efficiency. Also, a stop dwell feature helps prevent a motor from coasting to a stop; it allows users to preconfigure the motor to perform a controlled stop to help protect valuable motor investments.