10 CHARACTERISTICS
10.1 Overload protection characteristics
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10
10
CHARACTERISTICS
For the characteristics of the linear servo motor and the direct drive motor, refer to the following.
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 the
following section. [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-hand side area of the continuous or broken line in the graph.
Page 313 Electronic thermal protection characteristics
When unbalanced torque is generated, such as in a vertical lift machine, the unbalanced torque of the machine should be kept
at 70% or lower of the motor's rated torque.
This servo amplifier has solid-state servo motor overload protection. (The servo motor overload current (full load current) is
set on the basis of 120% rated current of the servo amplifier.)
The following table shows combinations of each servo motor and graph of overload protection characteristics.
Rotary servo motor
Graph of overload protection
characteristics
HG-KR
HG-MR
HG-SR
HG-UR
HG-RR
HG-JR
053
13
053
13
72
23
43
73
23
43
73
51
81
52
102
73
103
121
201
152
202
301
352
152
202
103
153
203
353
421
502
702
352
502
353
503
601
701M
503
703
801
12K1
15K1
20K1
25K1
11K1M
15K1M
22K1M
903
524
1024
734
1034
1524
2024
3524
3534
Summary of Contents for MELSERVO-J4 series
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