Mitsubishi Electric MR-J4 B Series Instruction Manual page 335

15. USING A DIRECT DRIVE MOTOR
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 table in consideration for the worst
operating conditions. 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 servo 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 at rated output
Servo motor
TM-RFM002C20
TM-RFM004C20
TM-RFM006C20
TM-RFM006E20
TM-RFM012E20
TM-RFM018E20
TM-RFM012G20
TM-RFM048G20
TM-RFM072G20
TM-RFM040J10
TM-RFM120J10
TM-RFM240J10
15.4.3 Dynamic brake characteristics
Power supply
capacity [kVA]
0.25
0.38
0.53
0.46
0.81
1.3
0.71
2.7
3.8
1.2
3.4
6.6
POINT
Do not use dynamic brake to stop in a normal operation as it is the function to
stop in emergency.
For a machine operating at the recommended load to motor inertia ratio or less,
the estimated number of usage times of the dynamic brake is 1000 times while
the machine decelerates from the rated speed to a stop once in 10 minutes.
Be sure to enable EM1 (Forced stop 1) after the direct drive motor stops when
using EM1 (Forced stop 1) frequently in other than emergency.
Servo amplifier-generated heat [W]
At rated output
25
35
40
40
50
50
50
90
110
50
90
160
15 - 18
Area required for heat
dissipation [m
With servo-off
15
15
15
15
15
15
15
20
20
15
20
25
2
]
0.5
0.7
0.8
0.8
1.0
1.0
1.0
1.8
2.2
1.0
1.8
3.2