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DOK-MOTOR*-MCL********-PR05-EN-P
Rexroth IndraDyn L Ironless Linear Motors MCL
11.3
Duty cycle and feed force
11.3.1
General information
11.3.2
Determining the duty cycle
The relative duty cycle ED specifies the duty cycle percentage of the load
with respect to a total duty cycle time, including idle time. The thermal load
capacity of the motor limits the duty cycle. Capacity the motor with rated force
is possible over the entire duty cycle time. The duty cycle must be reduced at
F > F
(see
fig. 11-20 "Correlation between duty cycle and feed force" on
dN
page
145) in order to not thermally overload the motor at higher feed forces.
Fig. 11-20:
Correlation between duty cycle and feed force
Due to the linear correlation of force and current, the detection of relative duty
cycle ED
happens via the correlation:
ideal
ED
Cyclic duration factor in %
ideal
F
Effective force or rated force in N
EFF
F
Maximum feed force
MAX
Fig. 11-21:
Approximate determination of duty cycle ED
Use
fig. 11-22 "Determining the duty cycle ED" on page 145
possible relative duty cycle.
ED
Possible relative duty cycle in %
real
P
Maximum dissipated rated power loss of the motor in W (for
vN
continuous power loss see Chapter 4 "Technical Data")
P
Average motor power loss in application over a duty cycle time
AVG a
including idle time in W
Fig. 11-22:
Determining the duty cycle ED
Bosch Rexroth AG
145/193
Motor dimensioning
to determine the
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