Mitsubishi Electric MELDAS MDS-B-SVJ2 Series, Specifications And Instruction Manual

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Chapter 9 Characteristics
9-2
9-1 Overload protection characteristics
The servo amplifier has an electronic thermal relay to protect the servomotor and servo amplifier from
overloads. The operation characteristics of the electronic thermal relay when standard parameters
(SV021=60, SV022=150) are set shown below.
If overload operation over the electronic thermal relay protection curve shown below is carried out,
overload 1 (alarm 50) will occur. If the maximum current is commanded at 95% or higher continuously
for one second or more due to a machine collision, etc., overload 2 (alarm 51) will occur.
The HA-FF053/13 and HC-MF053/13 have characteristics different from the other motors.
0.1
1.0
10.0
100.0
1000.0
0 50 100 150 200 250 300 350 400
Operat
ion t
im
e [
s
ec
]
When rotating
When stopped
95% of amplifier or motor
maximum capacity
Motor load rate [%]
Fig. 9-1 (1) Overload protection characteristics of MDS-B-SVJ2-01, -03, -04, -06, -07
0.1
1.0
10.0
100.0
1000.0
0 50 100 150 200 250 300 350 400
Operat
ion t
im
e [
s
ec
]
When rotating
When stopped
Motor load rate [%]
Fig. 9-1 (2) Overload protection characteristics of MDS-B-SVJ2-10, -20
0.1
1.0
10.0
100.0
1000.0
0 50 100 150 200 250 300 350 400
Operat
ion t
im
e [
s
ec
]
When rotating
When stopped
95% of motor maximum
capacity
Motor load rate [%]
Fig. 9-1 (3) Overload protection characteristics of HA-FF053/13, HC-MF053/13