Mitsubishi Electric MR-J4W2-0303B6, Instruction Manual

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15. USING A DIRECT DRIVE MOTOR
15 - 19
15.4.2 Power supply capacity and generated loss
Calculate the generated loss and the power supply capacity of the servo amplifier under rated load from (1)
and (2) in this section. The calculated value will vary depending on the number of connected direct drive
motors and the capacities of the direct drive motors. For thermal design of an enclosed type cabinet, use the
values calculated 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 direct drive motor is run at less than the rated speed, the power supply capacity will be
smaller than the calculated value, but the servo amplifier's generated heat will not change.
(1) Calculation method of power supply capacity
Calculate the power supply capacity for one servo amplifier from tables 15.1 and 15.2.
Table 15.1 Power supply capacity for
one servo amplifier at rated output
Table 15.2 Servo amplifier power
supply capacity for one direct drive
motor
Servo amplifier
Power supply capacity
[kVA] (Note)
Servo motor
Power supply capacity
[kVA] (A) (Note)
MR-J4W2-22B
Total power supply
capacity of connected
direct drive motors ((A)
in table 15.2)
TM-RFM002C20 0.25
MR-J4W2-44B TM-RFM004C20 0.38
MR-J4W2-77B TM-RFM006C20 0.53
MR-J4W2-1010B TM-RFM006E20 0.46
MR-J4W3-222B TM-RFM012E20 0.81
MR-J4W3-444B TM-RFM018E20 1.3
Note. The power supply capacity will vary
according to the power supply impedance.
This value is applicable when the power
factor improving reactor is not used.
TM-RFM012G20 0.71
TM-RFM040J10 1.2
TM-RG2M002C30 0.25
TM-RU2M002C30 0.25
TM-RG2M004E30 0.5 (0.7)
TM-RU2M004E30 0.5 (0.7)
TM-RG2M009G30 0.9
TM-RU2M009G30 0.9
Note. The value inside ( ) applies when the torque
is increased.
Calculate the power supply capacity with equation 10.1 in (1) in section 10.2.