sh030106u.pdf - 第521页

15. USIN G A DI REC T DRIV E MOTOR 15 - 18 1000 100 10 1 0.1 0 50 150 200 250 300 100 Servo-lock Operation tim e [s] (Note) Load ratio [%] Operating TM-RFM00 2C20/TM-RFM 004C2 0/ TM-RFM00 6C20/TM-RF M006E 20/ TM-RFM01 2E…

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15. USING A DIRECT DRIVE MOTOR
15 - 17
15.4 Characteristics
15.4.1 Overload protection characteristics
An electronic thermal is built in the servo amplifier to protect the servo amplifier, 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 Fig. 15.2 [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.)
15. USING A DIRECT DRIVE MOTOR
15 - 18
1000
100
10
1
0.1
0 50 150 200 250 300
100
Servo-lock
Operation time [s]
(Note) Load ratio [%]
Operating
TM-RFM002C20/TM-RFM004C20/
TM-RFM006C20/TM-RFM006E20/
TM-RFM012E20/TM-RFM018E20/
TM-RFM012G20/TM-RFM040J10
1000
100
10
1
0.1
0 50 150 200 250 300100
Servo-lock
Operation time [s]
(Note) Load ratio [%]
Operating
TM-RFM120J10
10000
1000
100
10
1
0 50 150 200 250 300100
Servo-lock
Operation time [s]
(Note) Load ratio [%]
Operating
TM-RFM048G20/TM-RFM072G20/
TM-RFM240J10
0 50 100 150 200 250 300 350
1000
100
10
1
0.1
Operation time [s]
Servo-lock
(Note) Load ratio [%]
Operating
TM-RG2M002C30/TM-RU2M002C30/
TM-RG2M004E30/TM-RU2M004E30/
TM-RG2M009G30/TM-RU2M009G30
Note. 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
re
g
ardless of the electronic thermal rela
y
protection.
Fig. 15.2 Electronic thermal relay protection characteristics
15. USING A DIRECT DRIVE MOTOR
15 - 19
15.4.2 Power supply capacity and generated loss
Table 15.1 indicates servo amplifiers' power supply capacities and losses generated under rated load. For
thermal design of an enclosed type cabinet, use the values in the tables in consideration for the harshest
conditions with regard to the environment and operation pattern. The actual amount of generated heat will be
intermediate between values at rated torque and servo-off according to the duty used during operation.
When the direct drive motor is run at less than the rated speed, the power supply capacity will be smaller
than the value in the table, but the servo amplifier's generated heat will not change.
Table 15.1 Power supply capacity and generated loss per direct drive motor
Direct drive motor Servo amplifier
Power supply
capacity [kVA]
Servo amplifier-generated heat [W]
Area required for
heat dissipation [m
2
]
At rated output With servo-off
TM-RG2M002C30
MR-J4-20B(-RJ)
MR-J4-20B1(-RJ)
0.25 25 15 0.5
TM-RU2M002C30
TM-RG2M004E30
MR-J4-20B(-RJ)
MR-J4-20B1(-RJ)
0.5 25 15 0.5
TM-RU2M004E30
TM-RG2M004E30
(Note)
MR-J4-40B(-RJ)
MR-J4-40B1(-RJ)
0.7 35 15 0.7
TM-RU2M004E30
(Note)
TM-RG2M009G30
MR-J4-40B(-RJ)
MR-J4-40B1(-RJ)
0.9 35 15 0.7
TM-RU2M009G30
TM-RFM002C20
MR-J4-20B(-RJ)
MR-J4-20B1(-RJ)
0.25 25 15 0.5
TM-RFM004C20
MR-J4-40B(-RJ)
MR-J4-40B1(-RJ)
0.38 35 15 0.7
TM-RFM006C20
MR-J4-60B(-RJ)
0.53 40 15 0.8
TM-RFM006E20 0.46 40 15 0.8
TM-RFM012E20 MR-J4-70B(-RJ) 0.81 50 15 1.0
TM-RFM018E20 MR-J4-100B(-RJ) 1.3 50 15 1.0
TM-RFM012G20 MR-J4-70B(-RJ) 0.71 50 15 1.0
TM-RFM048G20 MR-J4-350B(-RJ) 2.7 90 20 1.8
TM-RFM072G20 MR-J4-350B(-RJ) 3.8 110 20 2.2
TM-RFM040J10 MR-J4-70B(-RJ) 1.2 50 15 1.0
TM-RFM120J10 MR-J4-350B(-RJ) 3.4 90 20 1.8
TM-RFM240J10 MR-J4-500B(-RJ) 6.6 160 25 3.2
Note. This combination increases the rated torque and the maximum torque.