Mitsubishi Electric MELSERVO-J4 Instruction Manual page 139

8. CHARACTERISTICS
The following graphs show overload protection characteristics.
1000
100
Servo-lock
10
1
0.1
0 50 100
(Note 1, 2) Load ratio [%]
Characteristics a
1000
100
Servo-lock
10
1
0.1
0 50 100
(Note 1, 2) Load ratio [%]
Characteristics c
Note 1. If operation that generates torque more than 100% of the rating is performed with an abnormally high frequency in a servo
motor stop status (servo-lock status) or in a 30 r/min or less low-speed operation status, the servo amplifier may malfunction
regardless of the electronic thermal protection.
2. The operation time at the load ratio of 300% to 400% applies when the maximum torque of HG-JR servo motor is increased to
400%.
Operating
150 200 250 300 350
Operating
150 200 250 300 350
Fig. 8.1 Electronic thermal protection characteristics
1000
100
Servo-lock
10
1
0.1
400 0 50 100
Characteristics b
10000
1000
100
Servo-lock
10
400
1
0 50
Characteristics d
8 - 2
Operating
150 200 250
300
(Note 1, 2) Load ratio [%]
Operating
100 150 200
(Note 1) Load ratio [%]
350 400
250 300