Danfoss PVE 4 Series, Техническая информация

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PVHC control
PVHC characteristic
0
400 200 600
1
2
1200
800
1000 1400
Current in mA
3
4
5
6
Spool stroke, mm
7
1600
400 200 600
1200
800
1000
1400 1600
200
100
300 600
400
500 700 800
200
100
300 600 400 500
700 800
@ 12V
@ 24V
V310 000.A
Ideal curve
Hysteresis
280/560 mA 500/1000 mA 280/560 mA 500/1000 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 PVEA Series 4 PVEH Series 4
PVES voltage, position diagram PVEA voltage, position diagram PVEH voltage, position diagram
Technical Information PVE, Series 4 for PVG 32/100/120 and PVHC
PVE control
520L0553 • Rev GD • Jan 2014
31