Pvhc Control; Pve Hysteresis - Danfoss PVE Series 4 Technical Information

Technical Information
PVE control
PVE, Series 4 for PVG 32/100/120 and PVHC

PVHC control

PVHC characteristic
500/1000 mA 280/560 mA
PVHC current response and hysteresis @ 25 bar Pp, 21 ctS, 25 °C. The PVHC control is done by dual Pulse
Width Modulated (PVM) high current supply 100-400 Hz PWM control signals.
The PVHC does not have fault monitoring and internal closed loop control of the spool.
The PVHC has high hysteresis. The hysteresis is affected by viscosity, friction, flow forces, dither frequency
and modulation frequency.
The spool position will shift when conditions are changed e.g. temperature change.
For PVG controlled by PVHC hysteresis is influenced by lever (PVM).

PVE hysteresis

The controllability of the PVE depends on the solenoid valve bridge and the electronic capacity of the
module. Hysteresis is a measurement on spool position precision and repeatability. Hysteresis is not a
description of position maintaining.
PVES Series 4
PVES voltage, position diagram
520L0553 • Rev GD • Jan 2014
Spool stroke, mm
7
6
5
4
3
2
1
0
280/560 mA 500/1000 mA
PVEA Series 4
PVEA voltage, position diagram
Ideal curve
Hysteresis
Current in mA
@ 12V
@ 24V
V310 000.A
PVEH Series 4
PVEH voltage, position diagram
31