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9. CHARACTERISTICS
9.2 Power supply equipment capacity and generated loss
(1) Power supply equipment capacity and generated loss
Table 8.1 indicates the generated loss and power supply capacity under rated load per combination of
the converter unit and servo amplifier. 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 (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 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 8.1 does not include
heat produced during regeneration.
Table 8.1 Power Supply Capacity and Generated Heat Per Servo Amplifier at Rated Output
Servo Amplifier
MR-JS-30KA/B
MR-H30KAN/BN
MR-JS-37KA/B
MR-H37KAN/BN
MR-JS-30KA4/B4
MR-H30KAN4/BN4
MR-JS-37KA4/B4
MR-H37KAN4/BN4
MR-JS-47KA4/B4
MR-H47KAN4/BN4
MR-JS-55KA4/B4
MR-H55KAN4/BN4
Note. The heat generated by the servo amplifier is indicated in the left term within the parentheses, and the heat generated by the
converter unit in the right term.
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Converter Unit
improving
DC reactor
is not used
MH-HP30KA
MH-HP55KA4
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Power Supply
(Note)
Capacity [kVA]
Servo Amplifier-Generated Heart[W]
Power
Power
factor
factor
improving
At rated torque
DC reactor
is used
1650
48
40
(1100 550)
1650
59
49
(1310 342)
1290
48
40
(1010 280)
1650
59
49
(1310 342)
1810
71
59
(1370 440)
2190
87
72
(1690 500)
9 - 2
Area Required for
Heat Dissipation
2
At zero torque
[m
]
[ft
60
24.1
259.4
(30 30)
60
30.6
329.4
(30 30)
60
24.1
259.4
(30 30)
60
30.6
329.4
(30 30)
60
33.5
360.6
(30 30)
60
40.5
435.9
(30 30)
2
]
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