Determination Of Nominal Motor Size - Danfoss H1 Series Technical Information

Technical Information
H1 Bent Axis Variable Displacement Motors, Size 060/080/110/160/210/250
Technical specifications

Determination of nominal motor size

18 | © Danfoss | December 2016
Based on SI units
V • n
Q =
g
e
1000 •
v
V • p •
M = g mh
e
20 •
M • n Q • p •
P = e = e
e
9550 600
Q • 1000 •
n = e v
V
g
Where:
Q Input flow (l/min)
e
M
Output torque (N•m)
e
P Output power (kW)
e
-1
n
Speed (min )
V Motor displacement per rev. (cm
g
p
High pressure (bar)
high
p Low pressure (bar)
low
∆p
High pressure minus Low pressure (bar)
η Motor volumetric efficiency
v
η
Mechanical-hydraulic efficiency
mh
η Motor total efficiency (η
t
Based on US units
Q =
e
M =
e
t P =
e
n =
Where:
Q
e
M
e
P
e
n
3
/rev) V
g
p
high
p
low
∆p
η
v
η
mh
• η ) η
t
v mh
V • n
g
231 •
v
V • p •
g mh
2 •
V • n • p •
g t
396 000
Q • 231 •
e v
V
g
Input flow [US gal/min]
Output torque [lb•in]
Output power [hp]
Speed [rpm]
Motor displacement per rev. [in
High pressure [psi]
Low pressure [psi]
High pressure minus Low pressure [psi]
Motor volumetric efficiency
Mechanical-hydraulic efficiency
Motor total efficiency (η • η
v
11037153 | BC00000043en-US1103
3
/rev]
)
mh