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7 Selection
MITSUBISHI CNC
1. When two or more servomotor axes are connected, do the calculation with the largest rated
capacity of the servomotor if a value obtained by multiplying the total sum of the servomotor rated
output by "0.7" is smaller than the largest rated capacity of the servomotors.
Example: HF Series
(1)For "HF903 (9.0kW) + HF104 (1.0kW)", "0.7 x (9.0 + 1.0) =7.0 < 9.0" is applied.
So, do the calculation with applying "9.0kW" to the total sum of the servomotor's rated output.
(2)For "HF903 (9.0kW) + HF903 (9.0kW)", "0.7 x (9.0 + 9.0) = 12.6 > 9.0" is applied.
So, do the calculation with applying "12.6kW" to the total sum of the servomotor's rated output.
Example: HF-H Series
(1)For "HF-H903 (9.0kW) + HF-H104 (1.0kW)", "0.7 x (9.0 + 1.0) =7.0 < 9.0" is applied.
So, do the calculation with applying "9.0kW" to the total sum of the servomotor's rated output.
(2)For "HF-H903 (9.0kW) + HF-H903 (9.0kW)", "0.7 x (9.0 + 9.0) = 12.6 > 9.0" is applied.
So, do the calculation with applying "12.6kW" to the total sum of the servomotor's rated output.
2. When reducing the time constant replacing the conventional motor with the HF, HP, HF-KP, HF-H,
HP-H or HC-H Series motor, the power supply capacity may rise because the motor maximum
momentary output increases more than the conventional motor. Therefore, make sure to check the
selection with maximum momentary rated capacity.
3. When the large capacity drive unit (MDS-D-SP-400/640, MDS-DH-SP-200/320/450, MDS-DH-V1-
200) is connected to the power supply unit, always install the drive unit proximally in the left side of
the power supply unit and connect PN terminal with the dedicated DC connection bar.
4. When using two large capacity drive units or more, the power supply unit is required for each drive
unit.
5. This power supply selection is calculated with the servomotor effective load rate of approximate
80%. Considering the operation pattern, if the servomotor effective load rate is lower than this, the
required rated capacity of the power supply can be decreased.
CAUTION