061-11 Lohr, 2011-06-28

Variable-speed pressure and flow control system Sytronix DFEn 5000

The Sytronix DFEn 5000

The Sytronix DFEn 5000 closed-loop control system is available for series A10 and A4, making it suitable for use in a wide range of applications.

Closed-loop control system for energy-efficient system solution

The Rexroth Sytronix variable-speed pump drives comprise a comprehensive modular system of pumps, controller and motors as well as software depending on the cycle characteristics and configuration, the variable-speed pump drives can reduce energy consumption in the most varied applications by 30 to 80 percent. The Sytronix DFEn 5000 variable-speed pump system is a member of this product family. It is based on the proven DFE pressure and flow control system. In combination with a frequency converter, the system provides a dynamic and very economical solution for controlling oil volume and pressure.

The Sytronix DFEn 5000 closed-loop control system consists of a variable displacement axial piston pump driven by a standard asynchronous motor with frequency converter. Digital on-board electronics calculate the optimum speed for the entire drive system. The destroking of the variable displacement pump lowers the flow rate and reduces the engine load. The optimum speed for maintaining pressure is between 300 and 400 1/min depending on the pressure. With machines that work on cyclical basis, a teach-in process can be used to bring the system back up to speed just in time before an increase in flow rate.

With non-cyclical machines, a contact can be closed to raise the speed to the required minimum shortly before an increase in flow rate is required, for instance in case of a batch change. That way, the full dynamic of the control pump is available as and when needed. The control system is available for the pump series A10 and A4, making it suitable for use in a wide range of applications and also retrofittable.

Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the Rexroth brand name, the company supplies more than 500,000 customers with tailored solutions for driving, controlling, and moving. Bosch Rexroth is a partner for Mobile Applications, Machinery Applications and Engineering, Factory Automation and Renewable Energies. The company provides customized solutions tailored to the needs and specifications of each individual market. As The Drive & Control Company, Bosch Rexroth develops, produces, and sells components and systems in over 80 countries. As part of the Bosch Group, Bosch Rexroth and its 34,900 associates generated approximately 5.1 billion euros in revenue in 2010.

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The Bosch Group is a leading global supplier of technology and services. In the areas of automotive and industrial technology, consumer goods, and building technology, some 285,000 associates generated sales of 47.3 billion euros in fiscal 2010. The Bosch Group comprises Robert Bosch GmbH and its more than 350 subsidiaries and regional companies in over 60 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. Bosch spent 3.8 billion euros for research and development in 2010, and applied for over 3,800 patents worldwide. With all its products and services, Bosch enhances the quality of life by providing solutions which are both innovative and beneficial.

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