Power Supply Capacity And Generated Loss; Amount Of Heat Generated By Converter Unit - Mitsubishi Electric -MR-CV User Manual

6.2

Power supply capacity and generated loss

Amount of heat generated by converter unit

The following table indicates the generated loss and the power supply capacity of the converter unit under rated load.
Converter unit Power supply
capacity [kVA]
MR-CV11K 16
MR-CV18K 27
MR-CV30K 43
MR-CV37K 53
MR-CV45K 64
MR-CV55K 78
MR-CV11K4 16
MR-CV18K4 27
MR-CV30K4 43
MR-CV37K4 53
MR-CV45K4 64
MR-CV55K4 78
MR-CV75K4 107
Even if multiple drive units and servo amplifiers are connected to one converter unit, calculate the power supply capacity from
the capacity of the converter unit. If the total value of the output wattage of the servo motors driven by the drive units and
servo amplifiers connected to the converter unit is smaller than the converter capacity, the power supply capacity will be
smaller than the values in the table.
Because 2 to 2.5 times the instantaneous power is required during servo motor acceleration, use a power supply that can
secure a voltage within the permissible voltage fluctuation of the main circuit power supply terminals (L1/L2/L3) of the
converter unit. The power supply capacity will vary according to the power impedance.
The actual amount of generated heat depends on the frequency of use during operation and will be within the range of "At
rated output" and "At servo-off". For the design of an enclosed type cabinet, use the values in the tables in consideration for
the harshest conditions with regard to the environment and operation pattern.
Converter unit generated heat [W]
At rated output At rated output
(internal heat
generation when
cooling externally)
124 25
193 32
317 45
396 53
496 104
595 164
124 25
193 32
317 45
402 53
496 104
596 164
842 228
Area required for
heat dissipation
At servo-off
[m
25 2.5
25 3.9
25 6.4
25 8.0
25 10.0
30 12.0
25 2.5
25 3.9
25 6.4
25 8.1
25 10.0
30 12.0
30 16.9
6 CHARACTERISTICS
6.2 Power supply capacity and generated loss
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