Overload Protection Characteristics - Mitsubishi MR-JE-10B Instruction Manual

10. CHARACTERISTICS
10. CHARACTERISTICS

10.1 Overload protection characteristics

An electronic thermal is built in the servo amplifier to protect the servo motor, servo amplifier and servo
motor power wires from overloads.
[AL. 50 Overload 1] occurs if overload operation performed is above the electronic thermal protection curve
shown in fig. 10.1. [AL. 51 Overload 2] occurs if the maximum current is applied continuously for several
seconds due to machine collision, etc. Use the equipment on the left-side area of the continuous or broken
line in the graph.
For the system where the unbalanced torque occurs, such as a vertical axis system, the unbalanced torque
of the machine should be kept at 70% or lower of the motor's rated torque.
This servo amplifier has a servo motor overload protection. (The servo motor overload current (full load
current) is set on the basis of 110% rated current of the servo amplifier.)
1000
100
Servo-lock
10
1
0.1
0 50 100
(Note) Load ratio [%]
HG-KN13_
Operating
150 200 250 300 320
1000
100
10
1
0.1
0 50
HG-KN23_/HG-KN43_/
HG-KN73_/HG-SN52_/
10 - 1
Operating
Servo-lock
100 150 200 250
(Note) Load ratio [%]
HG-SN102_
300 320