7.2 Overload Protection Characteristics
61
7.2 Overload Protection Characteristics
The SERVOPACK provides a function to protect the servomotor and SERVOPACK from overloads.
• If an overload alarm occurs, remove the cause of the alarm and wait for at least one minute. Turn
ON the servomotor again after the servomotor has cooled sufficiently. If the operation of the servo-
motor is repeated within a short time, the servomotor coil may burn out.
• Use a correct combination of the SERVOPACK and servomotor.
• Overload protection characteristics are the values used when the motor attached to the aluminum
heatsink [250 mm
×
250 mm
×
6 mm (23.62 in
×
23.62 in
×
0.24 in)] at the ambient temperature of
40
°
C (104
°
F). Make sure to use the SERVOPACK in the recommended operating conditions.
The overload protection characteristics are shown below.
Note: The servomotor torque is given as a percentage of the rated torque.
Buil
t-in fun
c
ti
ons
Dynamic brake (DB)
Operated at main power OFF, servo alarm, servo OFF.
(OFF after motor stops; ON if the motor power is off.)
Regenerative processing
Optional
(If the regenerated energy is too large, install a regenerative unit.)
LED display
5 (PWE, REF, AL1, AL2, AL3)
Reference filter
Select one of eight levels with FIL switch.
Cooling method
Forced cooling (built-in fan)
SERVOPACK model SJDE-
01APA-OY
02APA-OY
04APA-OY
08APA-OY
NOTE
1000
100
10
1
100
150
200
250
300
Motor torque (%)
Time (s)
SJME-01 (100W)
Example: If the Servomotor torque is 300 %,
an overload alarm will occur in
approximately two seconds.
1000
100
10
1
100
150
200
250
300
Motor torque (%)
SJME-02 (200W) to SJME-08(750W)
Time (s)
TOEP_C710806_01A_0_0.book Seite 61 Montag, 2. Juli 2007 4:24 16