4.2 Specifications and Ratings
4.2.5 Servomotor Overload Protection Characteristics
4-8
4.2.5
Servomotor Overload Protection Characteristics
The overload detection level is set for hot start conditions with a Servomotor surrounding air tem-
perature of 40
°
C.
Note: The above overload protection characteristics do not mean that you can perform continuous duty operation
with an output of 100% or higher.
Use the Servomotor so that the effective torque remains within the continuous duty zone given in
During operation, the gear generates the loss at the gear mechanism and oil seal. The loss
depends on the torque and motor speed conditions. The temperature rise depends on the loss
and heat dissipation conditions. For the heat dissipation conditions, always refer to the following
table and check the gear and motor temperatures with the actual equipment. If the temperature
is too high, implement the following measures.
•
Decrease the load ratio.
•
Change the heat dissipation conditions.
•
Use forced-air cooling for the motor with a cooling fan or other means.
Important
•
A: 250 mm
×
250 mm
×
6 mm, aluminum plate
•
B: 300 mm
×
300 mm
×
12 mm, aluminum plate
•
C: 350 mm
×
350 mm
×
12 mm, aluminum plate
Model
Heat Sink Size
1/5
1/9 or 1/11
1/21
1/33
SGM7J-A5
A
SGM7J-01
B
SGM7J-C2
SGM7J-02
SGM7J-04
SGM7J-06
C
SGM7J-08
0
50
100
150
200
250
300
350
10000
1000
100
10
1
Detection time (s)
Motor speed of
10 min
-1
or higher
Motor speed of
less than 10 min
-1
Torque reference (percent of rated torque)
(%)
