Product category:
Motors and Variable speed drives
News Release from: Rockwell Automation | Subject: PowerFlex 700L
Edited by the Processingtalk Editorial
Team on 15 August 2007
Liquid-cooled AC drive delivers full
flexibility
Combining high-power performance with a space-saving design, the new Allen-Bradley PowerFlex 700L liquid-cooled drive from Rockwell Automation delivers unrivalled application versatility
With high-performance, energy-efficient liquid-cooled technology, the PowerFlex 700L allows installation in conditions where air-cooled drives may increase climatic control costs or where they simply could not operate, such as dusty locations Potential applications include HVAC/chillers, pumping applications such as water/wastewater, oil field machinery, marine propulsion, forming and stamping, log carriages, lathes, mining, centrifuges and many others
This article was originally published on Processingtalk on 13 Aug 2008 at 8.00am (UK)
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Thanks to its liquid cooling, PowerFlex 700L also requires far less floor space than conventional air-cooled drives, which further increases the versatility for many applications.
Unlike other liquid-cooled drives, which require a coolant line to each Insulated Gate Bipolar Transistor (IGBT) power transistor, the PowerFlex 700L features a single cooling input and output to the IGBTs.
This proprietary liquid-cooled heatsink greatly increases power density resulting in a drive that is up to 65% smaller compared with similar power-rated air-cooled drives.
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The simplified coolant system makes it easier for users to integrate the drive coolant supply with existing systems, such as recycled plant water, or if required, to incorporate a water-to-air heat exchanger loop to dissipate drive heat into the air.
Available in power ranges from 150 to 860kW, the PowerFlex 700L features IGBTs instead of diodes in its AC to DC converter section.
This provides the drive with an active rectifier that allows regenerated energy - commonly occurring in high-power applications such as presses and centrifuges - to be safely returned to the power system, thereby boosting energy efficiency.
Regenerative energy is actively modulated to avoid harmonic disturbances, making the drive one of the quietest in the industry.
The active rectifier technology of the PowerFlex 700L reduces power line harmonics to levels below IEEE 519 and CE requirements without installing additional hardware.
The active rectifier provides PowerFlex 700L with the ability to boost and regulate the drive DC bus voltage, minimising the effects of input voltage disturbances and power line dips - helping to protect sensitive processes.
This technology also provides a power line voltage boost that enables the drive to control a single voltage motor on both 480 and 380V power lines.
This flexibility is particularly beneficial to OEMs building machines for the international market.
Unbeatable versatility and energy-efficiency makes PowerFlex 700L a cool choice for top performance in many applications. Request a free brochure from Rockwell Automation ...
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