Merging Electrical & Hydraulic Systems for Improved VSD Pump Efficiency

Eaton increases energy efficiency with variable speed drive hydraulic pump solutions

Filtration Separation, June 10, 2015. Image credit: ABB

The fully integrated electro-hydraulic system is widely scalable. It comprises a broad range of vane and piston pumps, filters, frequency inverters, control and switch gear as well as Eaton’s innovative SmartWire-DT intelligent wiring technology.

Combining the power density and proven performance of Eaton’s pump systems with the smart control functionality of VSDs, the system can achieve power-on-demand in a more energy efficient way than a conventional system with proportional valve technology. Instead of operating constantly at 1500 RPM or 1800 RPM (depending on region), Eaton’s variable speed drive pumps can be controlled to match the load requirements of the current duty cycle via intelligent control – as a result energy waste can be eliminated.

The entire hydraulic power unit, which is controlled by Eaton’s HMI/PLCs, can allow for a high degree of scalability as they come with an Ethernet interface and also communicate with the common fieldbus systems as well as SmartWire-DT. With SmartWire-DT integrated, the HMI/PLC connects motor protection or pilot devices without conventional point-to-point wiring. Thus, the effort and time for wiring a machine is reduced by up to 85%.

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