5.2 Specifications and Ratings
5.2.5 Torque-Motor Speed Characteristics of the SGM7A-15 to -70
5-8
5.2.5
Torque-Motor Speed Characteristics
of the SGM7A-15 to -70
*
A single-phase power input can be used in combination with the SGD7S-120A
A008.
Note: 1. These values are for operation in combination with a SERVOPACK when the temperature of the armature
winding is 20
°
C. These are typical values.
2. The characteristics in the intermittent duty zone depend on the power supply voltage.
3. If the effective torque is within the allowable range for the rated torque, the Servomotor can be used within
the intermittent duty zone.
4. If you use a Servomotor Main Circuit Cable that exceeds 20 m, the intermittent duty zone in the torque-
motor speed characteristics will become smaller because the voltage drop increases.
Notes for the Ratings of Servomotors without Gears
*1.
These values are for operation in combination with a SERVOPACK when the temperature of the armature wind-
ing is 100
°
C. The values for other items are at 20
°
C. These are typical values.
*2.
The rated torques are the continuous allowable torque values at a surrounding air temperature of 40
°
C with an
aluminum heat sink of the dimensions 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.
To externally connect a dynamic brake resistor, select hardware option specification 020 for the SERVOPACK.
However,you cannot externally connect a dynamic brake resistor if you use the following SERVOPACKs (maxi-
mum applicable motor capacity: 400 W).
•
SGD7S-R70
A020 to -2R8
A020
•
SGD7W-1R6A20A020 to -2R8A20A020
•
SGD7C-1R6AMAA020 to -2R8MAA020
*6.
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.
*7.
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.
*8.
If the heat sink is 250 mm
×
250 mm
×
6 mm, the rated output is 550 W and the rated torque is 1.75 N·m.
Refer to the following section for details.
5.2.10 Servomotor Heat Dissipation Conditions
*9.
For the SGM7A-25A or SGM7A-50A, the maximum motor speed for the continuous duty zone is 5,000 min
-1
.
Use the Servomotor within the continuous duty zone for the average motor speed and effective torque.
A :
B :
SGM7A-15A
*
SGM7A-20A
A
B
SGM7A-25A
A
B
SGM7A-30A
A
B
A
B
Continuous duty zone
Torque (N·m)
Torque (N·m)
Torque (N·m)
Torque (N·m)
Intermittent duty zone
7000
6000
5000
4000
3000
2000
1000
0
0 5 10 15 20
Motor speed (min
-1
)
7000
6000
5000
4000
3000
2000
1000
0
0 5 10 15 20
Motor speed (min
-1
)
7000
6000
5000
4000
3000
2000
1000
0
Motor speed (min
-1
)
7000
6000
5000
4000
3000
2000
1000
0
0 10 20 30 40
Motor speed (min
-1
)
0 7.5 15 22.5 30
SGM7A-40A
A
B
0
10
20
30
40
15
30
45
60
15
30
45
60
0
1000
2000
3000
4000
5000
6000
7000
SGM7A-50A
A
B
0
0
1000
2000
3000
4000
5000
6000
7000
SGM7A-70A
A
B
0
0
1000
2000
3000
4000
5000
6000
7000
Torque (N·m)
Motor speed (min
-1
)
Torque (N·m)
Motor speed (min
-1
)
Torque (N·m)
Motor speed (min
-1
)
(solid lines): With three-phase 200-V or single-phase 230-V input
(dotted lines): With single-phase 200-V input
LF
Radial load
Thrust load
