MOOG ELECTROHYDROSTATIC PUMP UNIT WITH INTERNAL GEAR PUMP (EPU-G)

The EPU-G, featuring a 4-quadrant internal gear pump and a high dynamic

servomotor, targets applications with flow rates below 80 l/min and pressure

levels up to 345 bar where high dynamic response and power-density are key.

Engineered for direct control via pump speed, the EPU-G is suitable for self

contained hydrostatic transmissions and can build maximum pressure at both

pump ports. It is available in sizes 13 and 20 cm3. Sizes 5 and 8 cm3 will follow.

This is adding smaller pump volumes to the existing EPU product range, which

spans from 19 to 250 cm3.

The EPU-G’s variable speed and power-on-demand operation reduce noise

emissions at partial load, significantly lowering energy consumption and

operating costs. With high dynamics, low inertia and minimal pulsation, the

EPU-G enhances overall machine performance. Its compact axial mounting

interface allows direct manifold connection without additional piping, resulting

in increased system stiffness, reducing actuator footprint, simplifying machine

design, and reducing setup and maintenance time.

Addressing customer needs for ease of use, modularity, electrification, energy

efficiency, robustness, serviceability and sustainability, the EPU-G’s compact

design and reduced complexity make it easy to handle and integrate without

requiring extensive hydraulic expertise. Moog provides an end-to-end product

offering and supports customers in the transition from conventional hydraulic

or electromechanical to electrohydrostatic actuation from system design to

implementation.

ADVANTAGES

• No min. speed: Allows 0 rpm, easy close-looped control for a limited period

of time

• High dynamics: Increases machine performance, position/ pressure/ force

control

• 4-quadrant operation: eliminates the need for a control valve; helps realize

close-looped control

• Predefined range and combinations:

Simplifies maintenance and spare parts storage

• Manifold interface enables direct mounting, less piping, compact actuator

design

• High Efficiency: Ensures thermal stability, reduced losses

APPLICATIONS

• Applications with distinctive rapid and force movement / maximum utilization

of drive power i.e. medium and large size presses

• Steam, water and gas turbines

• Solar panel adjustment

• Process flaps and valves

• Commercial and municipal vehicles

• Construction and mobile machinery

• Active motion/bogie control (e.g. tilt trains)

• Chipboard and paper presses

• Food industry