Valve-Pump Parallel Variable Mode Control for Complex Speed Regulation Processes

Table 1

System configuration.

Components	Specification
Electric motor	Power 11 kW, rated speed 1500 r/min
PVP	Axial piston pump, geometric displacement 40 mL/r, electrohydraulic control with proportional solenoid, 0–10 V input
PDV	4/3 version, direct operated, size 6, rated flow 9 L/min at bar, frequency 60 Hz, damping ratio 0.7, 0–10 V input
PRV	Pilot operated, pressure rating 25 MPa, maximum flow 200 L/min, 0–10 V input
Hydraulic motor	Speed range 0–90 r/min, displacement 468 mL/r, rated pressure 40 MPa
Rotational inertia	48 kgm^2, modular design
Encoder	2000 P/r, TTL output