Efficient, Controllable, Digital
Digital Displacement Technology is based on a simple fundamental idea: Only use the cylinders that are required to meet the demand.
Through development of this concept, Digital Displacement hydraulic machines represent a true leap forward in hydraulic machine control and energy efficiency. Adopting the radial piston format and providing each piston with its own individually controlled solenoid valve, idle losses are minimised and high bandwidth control is available through switching on the cylinders on a cycle by cycle basis.
Digital Displacement introduces a new concept to hydraulic pump control in the form of true pressurised idle. With the shaft spinning and no demand to produce flow, all pistons are isolated from any line pressure and therefor incur minimal losses. From the idle state, full flow can be achieved within 30ms independantly of working pressure.
This noise is pervasive and excludes hydraulics from some application areas such automotive or noise critital production or test environments.
Digital Displacement pumps don’t contain a port plate and compression energy in the cylinder is fully recovered before the low pressure valve poppet opens.
- Digital Displacement reduces losses by approximately 90% in comparison to a similarly sized axial piston pump
- 30ms response time to demand, independent of pressure
- Low investment in prime mover – induction motor plus soft starter / DOL
- Reduction in fluid cooling requirement