Mitsubishi Electric MR-J3-B, Инструкция по эксплуатации

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10 - 1
10. CHARACTERISTICS
10. CHARACTERISTICS
10.1 Overload protection characteristics
An electronic thermal relay is built in the servo amplifier to protect the servo motor and servo amplifier from
overloads. Overload 1 alarm (50) occurs if overload operation performed is above the electronic thermal relay
protection curve shown in any of Figs 10.1. Overload 2 alarm (51) occurs if the maximum current flew
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.
In a machine like the one for vertical lift application where unbalanced torque will be produced, it is
recommended to use the machine so that the unbalanced torque is 70% or less of the rated torque.
When you carry out adhesion mounting of the servo amplifier, make circumference temperature into 0 to 45
,
or use it at 75% or a smaller effective load ratio.
1000
100
10
1
0.1
0 50 150 200 250 300 100
(Note) Load ratio [%]
O
p
e
rat
ion t
ime
[s
]
During operation
During servo lock
a. HF-MP053 13
HF-KP053 13
1000
100
10
1
0.1
0 50 150 200 250 300 100
(Note) Load ratio [%]
Operat
io
n
t
im
e
[s
]
During operation
During servo lock
b. HF-MP23 to 73
HF-KP23 to 73
HF-SP51 52 81 102
1000
100
10
1
0.1
0 50 150 200 250 300 100
(Note) Load ratio [%]
O
p
e
rat
ion t
ime[
s
]
During operation
During servo lock
c. HF-SP121 201 152 to 352
(Note) Load ratio [%]
O
p
e
ra
tio
n
tim
e
[s
]
10000
1000
100
10
1
0
50 150 200 250 100 300
During operation
During servo lock
d. HF-SP502 702
Note. 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 30r/min or less low-speed operation status, the servo amplifier may fail even when the
electronic thermal relay protection is not activated.
Fig 10.1 Electronic thermal relay protection characteristics