Servomotor Heat Dissipation Conditions; Applications Where The Surrounding Air Temperature Of The Servomotor Exceeds 40°C - YASKAWA E Series Product Manual

4.2.8

Servomotor Heat Dissipation Conditions

The Servomotor ratings are the continuous allowable values at a surrounding air temperature of
40°C when a heat sink is installed on the Servomotor. If the Servomotor is mounted on a small
device component, the Servomotor temperature may rise considerably because the surface for heat
dissipation becomes smaller. Refer to the following graphs for the relation between the heat sink
size and derating rate.
When using Servomotors with derating, change the overload warning and overload alarm detection
timing in advance based on the overload detection level of the motor. Refer to the following section
for the overload detection level of the motor.
4.2.5 Servomotor Overload Protection Characteristics on page 4-8
Note: The derating rates are applicable only when the average motor speed is less than or equal to the rated motor
speed. If the average motor speed exceeds the rated motor speed, consult with your Yaskawa representa-
tive.
The actual temperature rise depends on how the heat sink (i.e., the Servomotor mounting sec-
tion) is attached to the installation surface, what material is used for the Servomotor mounting
section, and the motor speed. Always check the Servomotor temperature with the actual equip-
Important
ment.
120
SGM7J-A5 and -01
100
80
60
40
20
0 50 100
Heat sink size (mm)
4.2.9 Applications Where the Surrounding Air Temperature of
the Servomotor Exceeds 40°C
The Servomotor ratings are the continuous allowable values at a surrounding air temperature of
40°C. If you use a Servomotor at a surrounding air temperature that exceeds 40°C (60°C max.),
apply a suitable derating rate from the following graphs.
When using Servomotors with derating, change the overload warning and overload alarm detection
timing in advance based on the overload detection level of the motor. Refer to the following section
for the overload detection level of the motor.
4.2.5 Servomotor Overload Protection Characteristics on page 4-8
Note: 1. Use the combination of the SERVOPACK and Servomotor so that the derating conditions are satisfied for
both the SERVOPACK and Servomotor.
2. The derating rates are applicable only when the average motor speed is less than or equal to the rated
motor speed. If the average motor speed exceeds the rated motor speed, consult with your Yaskawa rep-
resentative.
120
100
80
60
SGM7J-A5
40
20
0
0 10 20 30
Surrounding air temperature (°C)
120
SGM7J-02 and -04
100
80
SGM7J-C2
60
40
20
150 200 250 300 0 50
Heat sink size (mm)
120
SGM7J-01 and -C2
100
80
60
SGM7J-06 and -08
40
20
0
40 50 60 70 0 10 20
Surrounding air temperature (°C)
4.2.8 Servomotor Heat Dissipation Conditions
120
100
80
SGM7J-06
60
40
20
100 150 200 250 300 0 50
SGM7J-02 and -04
30 40 50 60 70
4.2 Specifications and Ratings
SGM7J-08
100 150 200 250 300
Heat sink size (mm)
4
4-11