72
1018854 8/2018
V03
Actuator selection
CanisDrive-25A-50
Illustration 72.1
Tentatively select a required actuator based upon load conditions.
FHA-25C-50 meets the tentative selection requirements from
catalogue value (see rating table)
Calculation of the
duty factor
n
2
= 40 rpm < n
max
= 112 rpm
J
L
= 1.3 kgm
2
< 3J
out
= 3.19 kgm
2
ED = 0.1 + 0.1 + 0.1 · 100 %
1.3
ED = 23 %
Calculate required acceleration torque (T
1
)
T
rms
= 38.8 Nm
n
av
= 6 rpm
T
1
= 5 +
2π
·
(1.3 + 0.86) · 40
= 103.8 Nm
60 0.1
Confirm: Is the required acceleration torque less than
the maximum output torque of the actuator?
Check according to the performance characteristics
T
rms
and n
av
are inside the continuous duty zone
T
1
= 103.8 Nm < T
max
= 127 Nm
Yes
Confirm final selection
Calculate effective torque (T
rms
)
T
1
= 103.8 Nm
T
2
= T
L
= 5 Nm
T
3
= T
L
- (T
1
- T
L
) = - 93.8 Nm
103.8
2
· 0.1 + 5
2
· 0.1 + (-93.8)
2
· 0.1
Calculation of the average speed
n
av
= 6 rpm
No
n
av
=
40
2
. 0.1 + 40 . 0.1 + 40 . 0.1
2
1.3
Output speed [rpm]
Output t
orque [Nm]
0 20 40 60 80 100 120
140
120
100
80
60
40
20
0
T
rms
= 38.8 Nm
n
av
= 6 rpm
T
1
= 103.8 Nm
n
2
= 40 rpm
T
rms
= 1.3 = 38.8 Nm
