Mitsubishi Electric MELSERVO-J4 series, Инструкция по эксплуатации

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508
15 USING A DIRECT DRIVE MOTOR
15.4 Characteristics
15.4
Characteristics
Overload protection characteristics
An electronic thermal relay is built in the servo amplifier to protect the servo amplifier, the direct drive motor, and direct drive
motor power wires from overloads.
[AL. 50 Overload 1] occurs if overload operation performed is above the electronic thermal relay protection curve shown in the
following figures. [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.
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 direct drive motor overload protection for each axis. (The direct drive motor overload
current (full load current) is set on the basis of 120% rated current of the servo amplifier.)
*1 If operation that generates torque more than 100% of the rating is performed with an abnormally high frequency in a direct drive motor
stop status (servo-lock status) or in a 50 r/min or less low-speed operation status, the servo amplifier may malfunction regardless of the
electronic thermal relay protection.
1000
100
10
1
0.1
0 50 150 200 250 300 100
Servo-lock
Operation time [s]
Load ratio [%]
*1
Operating
TM-RFM002C20/TM-RFM004C20/
TM-RFM006C20/TM-RFM006E20/
TM-RFM012E20/TM-RFM018E20/
TM-RFM012G20/TM-RFM040J10
TM-RFM240J10
TM-RFM048G20/TM-RFM072G20/
TM-RFM120J10
1000
100
10
1
0.1
0 50 150 200 250 300 100
Servo-lock
Operation time [s]
Load ratio [%]
*1
Operating
10000
1000
100
10
1
0
50 150 200 250 300 100
Servo-lock
Operation time [s]
Load ratio [%]
*1
Operating
0 50 100 150 200 250 300 350
1000
100
10
1
Servo-lock
Operating
0.1
TM-RG2M002C30/TM-RU2M002C30/
TM-RG2M004E30/TM-RU2M004E30/
TM-RG2M009G30/TM-RU2M009G30
Operation time [s]
Load ratio [%]
*1