Power Supply Equipment Capacity And Generated Loss - Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual

13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)

13.8.2 Power supply equipment capacity and generated loss

Table 13.1 indicates the generated loss and power supply capacity under rated load per combination of the
converter unit and drive unit. When the servo motors is run at less than the maximum 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 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 (L , L
1 2
supply impedance.
The actually generated heat falls within the ranges at rated torque and at zero torque according to the
frequencies of use during operation. When designing an enclosed control box, use the values in the table,
considering the worst operating conditions. The generated heat in Table 13.1 does not include heat produced
during regeneration.
Table 13.1 Power supply capacity and generated heat per servo amplifier at rated output
Converter unit Drive unit
MR-J3-DU30KB
MR-J3-CR55K
MR-J3-DU37KB
MR-J3-
DU30KB4
MR-J3-
MR-J3-CR55K4
DU37KB4
MR-J3-
DU45KB4
MR-J3-
DU55KB4
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.
POINT
The calculation method of heat dissipation area for enclosed control panel is
the same as that for servo amplifiers with 22kW or less. Refer to section 10.2
(2).
, L ) of the converter unit. The power supply equipment capacity changes with the power
3
Power factor
Servo motor
improving DC
reactor is not
HA-LP30K1
HA-LP30K1M
HA-LP30K2
HA-LP37K1
HA-LP37K1M
HA-LP37K2
HA-LP25K14
HA-LP30K14
HA-LP30K1M4
HA-LP30K24
HA-LP37K14
HA-LP37K1M4
HA-LP37K24
HA-LP45K1M4
HA-LP45K24
HA-LP50K1M4
HA-LP55K24
Power Supply
Capacity [kVA]
Power factor
improving DC
reactor is used
used
48 40
59 49
40 35
48 40
59 49
71 59
80 67
87 72
13 - 66
(Note)
Drive unit-generated heart[W]
At rated torque At zero torque
1550(1100+450)
1830(1280+550)
1080(850+230)
1290(1010+280) 60(30+30)
1542(1200+342)
1810(1370+440)
2120(1650+470)
2150(1650+500)
Area required
for heat
dissipation
2
[m ]
31.0
36.6
21.6
25.8
30.8
36.2
42.4
43.0