Instruction manual
Appendix 3. Selection
A3 - 2
Appendix 3-1 Selecting the power supply
When selecting the power supply capacity, select the capacity that satisfies both the "Appendix 3-1-1
Selecting according to the continuous rated capacity".
Appendix 3-1-1 Selecting according to the continuous rated capacity
Select the power supply capacity that satisfies the following conditions for the spindle motor to which the
power is supplied.
Power supply unit rated capacity ≥ ∑ (spindle motor output)….. (1)
Rated capacity of power supply unit
MDS-C1-CV- 37 55 75 110 150 185 220 260 300 370
Rated capacity:
(kW)
4.2 6.0 8.0 11.5 15.5 19.0 23.0 27.0 31.0 38.0
POINT
1. "Spindle motor output" refers to the short time rated output (kW) of the
spindle motor.
2. If the spindle motor output in acceleration/deceleration is different from that in
steady state, substitute the larger value for "spindle motor output".
3. If the spindle motor output is limited, multiply the output value by the limit rate
and then substitute the multiplied value for "spindle motor output".
4. If a spindle motor has a coil switch function, calculate with the specification of
the coil that has larger output.
CAUTION
1. If the selection capacity exceeds 38.0kW, use two or more power supply
units. Select so that the capacity of each power supply unit satisfies the
expressions (1).
2. Only when MDS-B-SPA-370 or larger capacity spindle drive unit is
connected, a large-capacity power supply unit (MDS-B-CVE-450, 550) can
be used. Refer to "Appendix 4. Explanation of Large Capacity Spindle Unit
Specifications" for details.
3. For the spindle drive unit, the drive unit capacity may become large
depending on the spindle motor such as high-troupe motor. Make sure that
the capacity limit of drive unit which can be connected is provided depending
on the power supply.
Power supply unit Spindle drive unit
37 MDS-C1-SPA-55 to 75
55 MDS-C1-SPA-55 to 110
75 MDS-C1-SPA-55 to 150
110 MDS-C1-SPA-55 to 185
150 MDS-C1-SPA-55 to 220
185 MDS-C1-SPA-55 to 260
220 MDS-C1-SPA-55 to 300
260
MDS-C1-SPA-55 to 300
MDS-B-SP-370
300
MDS-C1-SPA-55 to 300
MDS-B-SP-370 to 450
MDS-C1-CV-
370
MDS-C1-SPA-55 to 300
MDS-B-SP-370 to 550