Option Mhca - Hydraulic Proportional Control - Danfoss H1 Series Technical Information

Technical Information
H1 Bent Axis Variable Displacement Motors, Size 060/080/110/160/210/250
Controls – nomenclature, description
Option MHCA – hydraulic proportional control
70 | © Danfoss | December 2016
MH – hydraulic proportional non-pressurized = min. displacement
CA – without Pressure Compensator Over Ride / without Brake Pressure Defeat
Hydraulic schematic
MA L2
A
B
MB
Where:
A, B
Main pressure lines
L1, L2 Drain lines
M4, M5
Gauge port servo pressure
MA, MB Gauge port system pressure
X1
Control pressure port
N Speed sensor (optional)
Displacement (%) versus Input Command (bar)
100%
80%
60%
MH
40%
20%
0%
1
2
3
1 = Control ramp, 100% - 20% (14 bar [203 psi])
2 = Control ramp, 100% - 0% (17.5 bar [254 psi])
3 = Control start setting range
Grey area = Intended to be used for zero degree capability.
Control start setting range (pressure above case pressure)
p (possible settings per MMC.- adjustable)
start
P
max allowable
N
n
X1
X1
max
min
L1
M4 M5
P005905
MH
2 to 30 bar [29 to 435 psi]
Control start setting + 50 bar [725 psi]
Option MHCA
Hydraulic actuator X1
Non-pressurized = min. displacement.
Full-pressurized = max. displacement.
32°
6°
bar
P005 903
11037153 | BC00000043en-US1103