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Rockwell Automation announced new power ranges and motor control capabilities for its Allen-Bradley PowerFlex 6000 medium-voltage AC drives. This latest release provides a wider voltage range (2.4 to 11 kV) and provides 100 percent starting torque, leveraging sensorless vector control. The drives are designed for both variable and constant torque applications in heavy industries, providing new motor control options for compressors, pumps and fans.
The PowerFlex 6000 drive is designed to be easier to commission, use, and maintain, with standard faceplates and EtherNet/IP connectivity. The drive is a more cost-effective solution for heavy industries with higher power needs for their applications.
With an extended power range, the drive can be used for applications with output-voltage ratings up to 11 kV and motor current ratings up to 680 A, while remaining an air-cooled design. With eco-designed main cooling fans, users in Europe and other IEC-based markets can help to meet EC regulation 327 and ErP directive 2009, and help to avoid the larger footprint of a liquid-cooled drive. Internally powered cooling fans help to reduce customer-supplied control power requirements, and equipment and installation costs. A tertiary winding on the isolation transformer provides internal power for the fans.
Two new output-voltage ratings are available – 6.9 kV for North America, and 11 kV for EMEA and Australia. The full range of ratings includes 2.4, 3, 3.3, 4.16, 6, 6.3, 6.6, 6.9, 10 and 11 kV.
With optional, automatic cell bypass up to 680 A, users can help keep their operations running in case of a power cell failure and help reduce unplanned downtime. In addition, an uninterruptible power supply helps to increase system reliability, minimize downtime and mitigate potential machine damage.
Keywords: Medium-Voltage Drives, Sensorless Vector Control, Heavy Industries, Compressors, Variable Torque, Constant Torque, ARC Advisory Group.