Determination of nominal motor size
Based on SI units
Based on US units
V
g
• n
1000 •
v
Q
e
=
V
g
• p •
mh
20 •
M
e
=
Q
e
• p •
t
600
=
M
e
• n
9550
P
e
=
n = Q
e
• 1000 •
v
V
g
V
g
• n
231 •
v
Q
e
=
V
g
• p •
mh
2 •
M
e
=
V
g
• n • p •
t
396 000
P
e
=
n = Q
e
• 231 •
v
V
g
Where:
Q
e
Input flow (l/min)
M
e
Output torque (N•m)
P
e
Output power (kW)
n
Speed (min
-1
)
V
g
Motor displacement per rev. (cm
3
/rev)
p
high
High pressure (bar)
p
low
Low pressure (bar)
∆p
High pressure minus Low pressure (bar)
η
v
Motor volumetric efficiency
η
mh
Mechanical-hydraulic efficiency
η
t
Motor total efficiency (η
v
• η
mh
)
Where:
Q
e
Input flow [US gal/min]
M
e
Output torque [lb•in]
P
e
Output power [hp]
n
Speed [rpm]
V
g
Motor displacement per rev. [in
3
/rev]
p
high
High pressure [psi]
p
low
Low pressure [psi]
∆p
High pressure minus Low pressure [psi]
η
v
Motor volumetric efficiency
η
mh
Mechanical-hydraulic efficiency
η
t
Motor total efficiency (η
v
• η
mh
)
Technical Information
H1 Bent Axis Variable Displacement Motors, Size 060/080/110/160/210/250
Technical specifications
18 |
©
Danfoss | December 2016
11037153 | BC00000043en-US1103
