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High-Power Drives

Rockwell Automation has extended the power range of its PowerFlex 755 AC drives to 1,350 hp (900 kW) and added 600/690 V ratings. The new drives, well-suited for a variety of heavy industrial applications, provide users with increased application flexibility, advanced diagnostics and a common DC bus option. 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. In addition to the extended power range, a firmware upgrade for all PowerFlex 755 drives will contain features and benefits such as an interior permanent magnet motor control and a “Stop Dwell” feature.

Rockwell Automation Inc.,