Bosch Rexroth launches off-the-shelf variable frequency drives

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Bosch Rexroth launches off-the-shelf variable frequency drivesBosch Rexroth is unveiling its new EFC 3600 series variable frequency drives for general automation, materials handling, pumps, fans and conveyors. Although the company is better known for providing tailored systems, the EFC 3600 series, which will be available from The Inverter Drive Supermarket, marks Rexroth's first foray into an off-the-shelf product range.

Featuring both a Proportional Integral Derivative (PID) and a sequence control system, the EFC 3600 series allows energy-efficient operation of equipment and machinery at their optimal operating point. The in-built control systems also enable load-dependant adjustment of the voltage and frequency curve, thereby extending motor service life.

A high intermittent overload capacity of up to 200 per cent, as well as high initial torque of up to 150 per cent, means that the new drives can be adapted for a wide range of uses including both heavy-duty and energy-saving applications.

Initially designed for applications in the 370W to 4kW range, the EFC 3600 drives also feature integrated brake choppers and mains filters to reduce the need for additional components. Despite being highly functional, the easy-to-use removable control panel and compact design provide for quick and easy installation and configuration.

Speaking about the launch, Bosch Rexroth Automation Specialist Paul Streatfield says: "The new EFC 3600 series marks the first time that we have entered into the low-cost, high-volume drives and controls market. This has been made possible by advances in technology, which mean that we can now provide intelligent drives that can be adapted for a wide range of applications.

"Our experiences at the higher end of the market have helped us create a series of variable frequency drives that, as well as reducing energy usage and prolonging operational efficiency, are quick and easy to install. All of this comes with the added reassurance of being a Rexroth product, meaning they can be considered highly reliable and able to deliver optimal functionality as standard."

The new EFC 3600 series of variable frequency drives is available from

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