Stober PK - Page 80

The values for fB
T
can be found in the corresponding table in this chapter.
The value for the torque of the motor at operating point M
op
with the determined average input speed n
1m*
can be found in the motor characteristic curve in the chapter [}11.3]. Note the size, nominal speed n
N
and
cooling type of the motor. The figure below shows an example of reading the torque M
op
of a motor with
convection cooling at the operating point.
[rpm]
n
1m*
n
Operating factors
Operating mode fB
op
Uniform continuous operation 1.00
Cyclic operation 1.00
Reversing load cyclic operation 1.00
Run time fB
t
Daily runtime ≤ 8 h 1.00
Daily runtime ≤ 16 h 1.15
Daily runtime ≤ 24 h 1.20
Cyclic operation fB
ZB
≤ 1000 load changes/hour (LW/h) 1.00
> 1000 load changes/hour (LW/h) 1.15
Temperature fB
T
Motor cooling Surrounding temperature
Motor with forced ventilation ≤ 20 °C
≤ 30 °C
≤ 40 °C
0.9
1.0
1.15
Motor with convection cooling ≤ 20 °C
≤ 30 °C
≤ 40 °C
1.0
1.1
1.25
Notes
• The maximum permitted gear unit temperature (see the "Other product features" chapter) must not be
exceeded. Doing so may result in damage to the geared motor.
• For braking from full speed (for example when the power fails or when setting up the machine), note
the permitted gear unit torques (M
2acc
, M
2NOT
) in the selection tables.
4.6 Project configuration 4 PHQplanetary geared motors
80