7.2 Specifications and Ratings
7.2.6 Servomotor Overload Protection Characteristics
7
Specifications, Ratings, and Exter
nal Dimensions of SGM7G Servomotors
7-7
Notes for the Servomotor Ratings Tables
*1.
These values are for operation in combination with a SERVOPACK when the temperature of the armature wind-
ing is 20°C. These are typical values.
*2.
The rated torques are the continuous allowable torque values with an aluminum or steel heat sink of the dimen-
sions given in the table.
*3.
This does not apply to the shaft opening. Protective structure specifications apply only when the special cable is
used.
*4.
Observe the following precautions if you use a Servomotor with a Holding Brake.
•
The holding brake cannot be used to stop the Servomotor.
•
The time required to release the brake and the time required to brake depend on which discharge circuit is
used. Confirm that the operation delay time is appropriate for the actual equipment.
•
The 24-VDC power supply is not provided by Yaskawa.
*5.
The allowable shaft loads are illustrated in the following figure. Design the mechanical system so that the thrust
and radial loads applied to the Servomotor shaft end during operation do not exceed the values given in the
table.
*6.
This is the value if you combine the SGM7G-30A with the SGD7S-200A.
7.2.6
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 contin-
uous duty zone given in
Radial load
Thrust load
LF
SGM7G-03 and -05
0
50
100
150
200
250
300
10000
1000
100
10
1
SGM7G-09, -13, and -20
0
50
100
150
200
250
300
10000
1000
100
10
1
Detection time (s)
Detection time (s)
Torque reference (percent of rated torque)
(%)
Torque reference (percent of rated torque)
(%)
SGM7G-05
SGM7G-03
SGM7G-13
SGM7G-09
SGM7G-20
SGM7G-30, -44, -55, and -75
0
50
100
150
200
250
300
10000
1000
100
10
1
SGM7G-1A and -1E
0
50
100
150
200
250
300
10000
1000
100
10
1
SGM7G-30 and -55
SGM7G-75
SGM7G-44
SGM7G-1A
SGM7G-1E
Detection time (s)
Detection time (s)
Torque reference (percent of rated torque)
(%)
Torque reference (percent of rated torque)
(%)
