Bosch Rexroth A6VM series 71 - HA Control: Pressure Increase and Characteristic Curves; HA1: Minimum Pressure Increase Operation; HA2: Pressure Increase Operation

Bosch Rexroth Corp., RE-A 91610/12.2015
18 A6VM series 71 | Axial piston variable motor
HA – Automatic high-pressure related control
HA1 with minimum pressure increase, positive control
An operating pressure increase of Δp ≤approx.145psi
(10bar) results in an increase in displacement from V
g min
towards V
g max
.
Beginning of control, setting range
1150 to 5100psi (80 to
350bar)
Please state the desired beginning of control in plain text
when ordering, e. g.: beginning of control at 4350psi
(300bar).
▼ Characteristic curve HA1
5800 (400)
5100 (350)
4350 (300)
3600 (250)
2900 (200)
2200 (150)
1450 (100)
1150 (80)
725 (50)
0
V
g min
V
g max
V
g
/ V
g max
0 0.2 0.4 0.6 0.8 1.0
Pressure increase Δp≤approx. 145psi (10bar)
Operating pressure p [psi (bar)]
Beginning of control
setting range
Displacement
▼ Circuit diagram HA1
B
A
M
1
T
2
T
1
V
g min
V
g max
G
U
X
HA2 with pressure increase, positive control
An operating pressure increase of Δp ≤approx.1450psi
(100bar) results in an increase in displacement from V
g min
to V
g max
.
Beginning of control, setting range
1150 to 5100psi (80 to
350bar)
Please state the desired beginning of control in plain text
when ordering, e. g.: beginning of control at 2900psi
(200bar)
▼ Characteristic curve HA2
6500 (450)
5800 (400)
5100 (350)
4350 (300)
3600 (250)
2900 (200)
2200 (150)
1450 (100)
1150 (80)
725 (50)
0
V
g min
V
g max
V
g
/ V
g max
0 0.2 0.4 0.6 0.8 1.0
Pressure increase Δp≤approx. 1450psi (100bar)
Operating pressure p [psi (bar)]
Beginning of control
setting range
Displacement
▼ Circuit diagram HA2
B
A
M
1
T
2
T
1
G
X
V
g min
V
g max
U