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10. CHARACTERISTICS
10 - 3
10.2 Power supply capacity and generated loss
(1) Servo amplifier generated heat
Table 10.1 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 10.1 Power supply capacity and generated loss per servo motor at rated output
Servo amplifier Servo motor
(Note 1)
Power supply
capacity
[kVA]
(Note 2) Servo amplifier-
generated heat [W]
Area required
for heat
dissipation [m
2
]
At rated output With servo-off
MR-JE-10B HG-KN13_ 0.3 25 15 0.5
MR-JE-20B HG-KN23_ 0.5 25 15 0.5
MR-JE-40B HG-KN43_ 0.9 35 15 0.7
MR-JE-70B
HG-KN73_ 1.3 50 15 1.0
HG-SN52_ 1.0 40 15 0.8
MR-JE-100B HG-SN102_ 1.7 50 15 1.0
MR-JE-200B
HG-SN152_ 2.5
90 20 1.8
HG-SN202_ 3.5
MR-JE-300B HG-SN302_ 4.8 120 20 2.4
Note 1. Note that the power supply capacity will vary according to the power supply impedance. This value is
applicable when the power factor improving AC reactor is not used.
2. Heat generated during regeneration is not included in the servo amplifier-generated heat. To calculate
heat generated by the regenerative option, refer to section 11.2.