Industrial Hydraulics

Bosch Rexroth AG Industrial Hydraulics 109
Electronic components
Closed-loop control systems with A4VSO variable displacement
axial piston unit
< Pump sizes 125 to 355
< Infinitely variable control of flow and pressure
< Additional power limitation possible
< High reproducibility of flow and pressure due to closed control loop
< Dynamics of flow control corresponds to dynamics of control with proportional valves due
to short adjustment times of the pump
< Prevention of throttling losses due to central flow and pressure control (energy savings)
< Matching of the pressure controller to the consumer possible through parameter settings
< Integrated analogue control electronics with type SYHDFEE
< Integrated digital control electronics with CAN with type SYHDFEC
Types SYHDFE1, SYHDFEE and SYHDFEC
Pump size 125 180 250 355
Operating pressure pmax bar 350 350 350 350
Nominal flow n = 1500 min-1 qV nom L/min 187 270 375 532
Step response (swivel
angle control 100 bar)
0 to 100 %
100 to 0 %
Tu +Tg Tu +Tg ms
ms
80
70
110
80
130
130
170
180
SYHDFE1, SYHDFEE and SYHDFEC closed-loop control systems
System structure: – A4VSO variable displacement axial piston pump with proportional valve and
swivel angle transducer
– Integrated HM 16 pressure transducer or external
– Integrated electronics
Fields of application: – Presses
– Plastics processing machines
– Test benches
Detailed information:
– Type SYHDFE1:
on inquiry
– Type SYHDFEC:
on inquiry
– Type SYHDFEE:
RE 30035