Variable-speed drive solutions

Intelligent power adjustment instead of constant full load

Conventional hydraulic drives often run continuously at their rated speed, with excess energy being converted into heat without being utilised. This is where HYDAC variable-speed drive (VSD) solutions come into play: A frequency converter regulates the speed of the electric motor precisely according to the current requirements of the hydraulic consumer. During load pauses, the speed is reduced to zero. This not only saves a huge amount of energy, but also protects the oil and all the mechanical components of your system.

Symbiosis between hydraulics and electronics

The technical superiority of variable-speed hydraulic systems lies in the perfectly co-ordinated combination of hydraulic pump, synchronous or asynchronous motor and an intelligent drive controller with integrated HYDAC software. This makes it possible to simplify the hydraulic installation with switching valves instead of control valves. This software has pre-configured hydraulic functions (e.g. pressure control, positioning or flow setting), which can dramatically simplify the hydraulic system.

The hydraulics are reduced to their key strengths: Building up power. The weakness of hydraulics: Energy-intensive control through variable displacement pumps and control valves is transferred to the electrical side with energy-saving effect.

This leads to efficiency at several levels: Reduction of power & cooling requirements, tank & oil volume as well as material & weight.

Another key benefit: The reduced average speed significantly reduces the noise level of the system.

Sustainability as a business case

For project managers, buyers and plant managers, DVA technology is a key way to reduce total cost of ownership (TCO) and simplify system complexity. In many cases, switching from conventional hydraulic systems with variable displacement pumps and control valves to variable-speed hydraulics is cost-neutral because many other components such as cooling, pressure filtration and control valves are no longer needed and the tank volume can be significantly reduced. In addition, HYDAC DVA solutions help companies achieve their CO₂ goals and fulfil ISO 50001 certifications. We supply the drive solutions either as a pre-assembled kit for integration into your existing machine (retrofit) or as the heart of a new HYDAC hydraulic system.