Home > Rockwell Automation extends power range of Allen-Bradley PowerFlex 755 AC drives

Rockwell Automation extends power range of Allen-Bradley PowerFlex 755 AC drives

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article image New high-power drives provide users with expanded application flexibility, additional voltages and common DC bus option for energy savings

Rockwell Automation  presents a new range of high-power AC drives that provide users with expanded application flexibility, additional voltages, advanced diagnostics and a common DC bus option for energy savings.    

Rockwell Automation has extended the power range of its PowerFlex 755 AC drives to 900 kW and added 690 volt ratings for use in a variety of heavy industrial applications.  

According to Andrew Hoch, Solution Architect Power Control, Rockwell Automation, the horsepower range has been expanded and new features added to bring the benefits of the PowerFlex 755 family such as advanced diagnostics, a convenient roll-out design and control options to a broader range of motor control applications.  

He adds that the new AC drives will help heavy industrial users reduce costs through enhanced flexibility, decreased downtime and low mean time to repair.  

The common DC bus option allows users to connect the PowerFlex 755 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.   

Key features of the new PowerFlex 755 AC drives:  

  • Embedded Ethernet port and five option slots allow users to customise to specific application
  • Option modules include I/O, feedback, safety, additional communications and auxiliary power supply
  • Convenient roll-out design allows easy access to the drive for fast installation and maintenance
  • Drive’s converter and control pod can remain in the unit while the inverter is rolled out allowing control wiring to remain connected


Firmware upgrade features for all PowerFlex 755 drives:   

  • Interior Permanent Magnet Motor Control delivers increased application flexibility and high energy efficiency
  • ‘Stop Dwell’ feature helps prevent motors from coasting to a stop, allowing users to preconfigure the motor to perform a controlled stop to protect valuable motor investments


Rockwell Automation plans to release the next version of Rockwell Software RSLogix 5000 software, which will include an automatic device configuration feature, enabling Logix controllers to automatically configure the drive upon installation. Users can quickly and easily replace drives without programming, improving uptime while reducing time and money spent on installation.

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