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MDS-D/DH Series Specifications Manual
7-3 Selection of the power supply unit
7-3-3 Selection of the power supply unit
Select the power supply unit from the total sum of the rate output and the maximum momentary output.
(1) Calculation of required rated output
(a) When there is only one servomotor axis
Power supply unit rated capacity > Σ (Spindle rated output) + (Servomotor rated output)
(b) When there are two or more servomotor axes
Power supply unit rated capacity > Σ (Spindle rated output) + 0.7 Σ (Servomotor rated output)
Substitute the output calculated from "7-2-1(1)" and "7-2-2(1)" to the expression (a) and (b), and calculate
the total sum of the spindle rated output and servo motor rated output. According to this, select the power
supply unit satisfying the rated capacity from the table 4.
(2) Calculation of required maximum momentary output
Substitute the output calculated from "7-2-1(2)" and "7-2-2(2)" to the above expression, and calculate the
total sum of the "spindle maximum momentary output" and "output of servomotor accelerating/ decelerating
simultaneously". According to this, select the power supply unit satisfying the maximum momentary rated
capacity from the table 4.
(3) Selection of power supply unit
Select the power supply unit of which the capacity is larger than that selected in the item (1) and (2).
Table 4. Power supply unit rated capacity and maximum momentary rated capacity
< MDS-D Series >
< MDS-DH Series >
Unit MDS-D-CV- 37 75 110 185 300 370 450 550
Rated capacity (kW) 4.2 8 11.5 19 31 38 46 56
Maximum momentary rated capacity
(kW)
16 23 39 60 92 101 125 175
Unit MDS-DH-CV- 37 75 110 185 300 370 450 550 750
Rated capacity (kW) 4.2811.5193138465676
Maximum momentary rated capacity (kW) 16 23 39 60 92 101 125 175 180
Maximum momentary rated capacity of power supply unit
Σ (Spindle maximum momentary output) + Σ (Maximum momentary output of
servomotor accelerating/ decelerating simultaneously)