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TOEP_C710806_01A_0_0.book Seite 61 Montag, 2. Juli 2007 4:24 16
7.2 Overload Protection Characteristics
Built-in functions
SERVOPACK model SJDE-
01APA-OY
02APA-OY
04APA-OY
08APA-OY
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)
7.2 Overload Protection Characteristics
The SERVOPACK provides a function to protect the servomotor and SERVOPACK from overloads.
NOTE
• 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 servomotor 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.
SJME-01 (100W)
1000
Example: If the Servomotor torque is 300 %,
an overload alarm will occur in
approximately two seconds.
100
Time (s)
10
1
100
150
200
250
300
Motor torque (%)
SJME-02 (200W) to SJME-08(750W)
1000
100
Time (s)
10
1
100
150
200
250
300
Motor torque (%)
Note: The servomotor torque is given as a percentage of the rated torque.
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