Power Supply Capacity And Generated Loss - Mitsubishi Electric MELSERVO-J4 Series Transition Handbook

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_

6.2 Power supply capacity and generated loss

(1) Generated heat of the converter unit/drive unit
Table 5.1 and 5.2 indicates the generated loss and power supply capacity under rated load per
combination of the converter unit and drive unit. When the servo motors are run at less than the rated
speed, the power supply equipment capacity is lower than the value in the table but the heat generated
does not change.
Since the servo motor requires 2 times to 2.5 times greater instantaneous power for acceleration, use
the power supply which ensures that the voltage lies within the permissible voltage fluctuation at the
main circuit power supply terminals (L1/L2/L3) of the converter unit. The power supply equipment
capacity changes with the power supply impedance. The actually generated heat falls within the ranges
at rated output and at servo-off according to the frequencies of use during operation. When designing an
enclosed cabinet, use the values in the table, considering the worst operating conditions. The generated
heat in table 5.1 and 5.2 does not include heat produced during regeneration.
(a) MR-J3-DU_
Table 5.1 Power supply capacity and generated heat per servo amplifier at rated output
Converter unit Drive unit
MR-J3-DU30K_
MR-J3-CR55K
MR-J3-DU37K_
MR-J3-DU30K_4
MR-J3-CR55K4 MR-J3-DU37K_4
MR-J3-DU45K_4
MR-J3-DU55K_4
Note. The heat generated by the drive unit is indicated in the left term within the parentheses, and the heat generated by the converter
unit in the right term.
Power supply capacity [kVA]
Power factor
Servo motor improving DC
reactor is not
used
HA-LP30K1
HA-LP30K1M 48
HA-LP30K2
HA-LP37K1
HA-LP37K1M 59
HA-LP37K2
HA-LP25K14 40
HA-LP30K14
HA-LP30K1M4 48
HA-LP30K24
HA-LP37K14
HA-LP37K1M4 59
HA-LP37K24
HA-LP45K1M4
71
HA-LP45K24
HA-LP50K1M4 80
HA-LP55K24 87
5 - 46
Drive unit-generated heart [W] (Note)
Power factor
improving DC
At rated torque
reactor is
used
40 1550 (1100 + 450)
49 1830 (1280 + 550)
35 1080 (850 + 230)
40 1290 (1010 + 280)
49 1542 (1200 + 342)
59 1810 (1370 + 440)
67 2120 (1650 + 470)
72 2150 (1650 + 500)
At rated output
[Generated heat
in the cabinet
At zero torque
when cooled
outside the
cabinet]
470
550
330
390 60 (30 + 30)
470
550
640
650
Area
required
for heat
dissipation
[m 2 ]
31.0
36.6
21.6
25.8
30.8
36.2
42.4
43.0