Mitsubishi Electric Melservo MR-J3-100B, Handbook

Page: 241 / 590

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
5 - 46
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 resistance regeneration 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 resistance regeneration 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 Servo motor
Power supply capacity [kVA] Drive unit-generated heart [W] (Note)
Area
required
for heat
dissipation
[m 2 ]
Power factor
improving DC
reactor is not
used
Power factor
improving DC
reactor is
used
At rated torque
At rated output
[Generated heat
in the cabinet
when cooled
outside the
cabinet]
At zero torque
MR-J3-CR55K
MR-J3-DU30KB
HA-LP30K1
HA-LP30K1M
HA-LP30K2
48 40 1550 (1100 + 450) 470 31.0
MR-J3-DU37KB
HA-LP37K1
HA-LP37K1M
HA-LP37K2
59 49 1830 (1280 + 550) 550 36.6
MR-J3-DU30KB4
HA-LP25K14 40 35 1080 (850 + 230) 330 21.6
HA-LP30K14
HA-LP30K1M4
HA-LP30K24
48 40 1290 (1010 + 280) 390 60 (30 + 30) 25.8
MR-J3-CR55K4 MR-J3-DU37KB4
HA-LP37K14
HA-LP37K1M4
HA-LP37K24
59 49 1542 (1200 + 342) 470 30.8
MR-J3-DU45KB4
HA-LP45K1M4
HA-LP45K24
71 59 1810 (1370 + 440) 550 36.2
MR-J3-DU55KB4
HA-LP50K1M4 80 67 2120 (1650 + 470) 640 42.4
HA-LP55K24 87 72 2150 (1650 + 500) 650 43.0
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.