4 SERVOPACK Specifications and Dimensional Drawings
4.5.1 Overload Characteristics
4-12
4.5 SERVOPACK Overload Characteristics and Allowable Load
Moment of Inertia
4.5.1 Overload Characteristics
SERVOPACKs have a built-in overload protective function that protects the SERVOPACKs and servomotors
from overload. Allowable power for the SERVOPACKs is limited by the overload protective function as shown
in the figure below.
The overload detection level is set under hot start
1
conditions at a servomotor ambient temperature of 40°C
(104°F).
Note: The overload protection characteristics of A and B in the figure are applicable when the SERVOPACK is
combined with one of the following servomotors.
A: SGMAH or SGMPH servomotor with a capacity of maximum 400 W.
B: SGMAH or SGMPH servomotors with a capacity more than 400 W and SGMGH, SGMSH, and
SGMDH servomotors.
1
Hot Start
A hot start indicates that both the SERVOPACK and the servomotor have run long enough at the rated load to be thermally
saturated.
TERMS
10000
1000
100
10
5
1
Operating time (s)
Rated torque Maximum torque
Motor torque
B
A
Approx.
Rated torque
+ Maximum torque
2
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