Characteristics; Capacity Of Power Source Facility And Generation Loss - Mitsubishi Electric MELSERVO-J2S Series Transition Handbook

Part 5: Review on Replacement of MR-J2S-30 kW or Higher Capacity Models with MR-J4-DU_

4. CHARACTERISTICS

4.1 Capacity of Power Source Facility and Generation Loss

(1) Calorific values of converter units and drive units
Table 5.1 and Table 5.2 shows heat losses at rated load and power supply capacity for a set of a
converter unit and drive unit. When a servo motor runs at a speed less than its rated speed, its power
supply capacity becomes less than a value in the table while its calorific value remains the same.
Since the servo motor requires 2 times to 2.5 times greater instantaneous power for acceleration, use
the power supply which ensures that the voltage lies within the permissible voltage fluctuation at the
main circuit power supply terminals (L1/L2/L3) of the converter unit. The power supply equipment
capacity changes with the power supply impedance.
The actually generated heat falls within the ranges at rated output and at servo-off according to the
frequencies of use during operation. When designing an enclosed cabinet, use the values in the table,
considering the worst operating conditions. The calorific values in Table 5.1 and Table 5.2 do not include
those at regeneration.
(a) MR-J2S series
Table 5.1 Power supply capacities and calorific values per axis at rated output for MR-J2S series
Servo amplifier Converter unit
MR-J2S-30KA/B
MR-HP30KA
MR-J2S-37KA/B
MR-J2S-30KA4/B4
MR-J2S-37KA4/B4
MR-HP55KA4
MR-J2S-45KA4/B4
MR-J2S-55KA4/B4
Note. A term on the left in () is for a servo amplifier and one on the right is for a converter unit.
(b) MR-J4-DU_
Table 5.2 Power supply capacities and calorific values at rated output for power regeneration converter unit
Converter unit Drive unit
MR-J4-DU30K_
MR-CR55K
MR-J4-DU37K_
MR-J4-DU30K_4
MR-J4-DU37K_4
MR-CR55K4
MR-J4-DU45K_4
MR-J4-DU55K_4
Note. A term on the left in () is for a drive unit and one on the right is for a converter unit.
Power supply capacity [kVA]
Power factor Power factor
improving DC improving DC
reactor not used reactor used
48
59
48
59
71
87
Power supply capacity [kVA]
Power factor
Servo motor
improving DC
reactor not used
HG-JR30K1
48
HG-JR30K1M
HG-JR37K1
59
HG-JR37K1M
HG-JR30K14
48
HG-JR30K1M4
HG-JR37K14
59
HG-JR37K1M4
HG-JR45K1M4 71
HG-JR55K1M4 87
The calorific value of a servo amplifier [W] (Note)
At rated output
1650
40
(1100 + 550)
1850
49
(1300 + 550)
1290
40
(1010 + 280)
1650
49
(1310 + 342)
1810
59
(1370 + 440)
2190
72
(1690 + 500)
The calorific value of a drive unit [W] (Note)
Power factor
improving DC
At rated output
reactor used
40 1350 (900 + 450)
49 1550 (1000 + 550)
40 1070 (790 + 280)
49 1252 (910 + 342)
59 1580 (1110 + 470)
72 1940 (1440 + 500)
5 - 30
Required heat
dissipation
At zero torque
area [m
60
24.1
(30 + 30)
60
30.6
(30 + 30)
60
24.1
(30 + 30)
60
30.6
(30 + 30)
60
33.5
(30 + 30)
60
40.5
(30 + 30)
Required
At rated output
[Internal heat
dissipation
Servo off
generation at
area [m
external cooling]
470
550
390
60
(30 + 30)
470
550
650
2 ]
heat
2 ]
31.0
36.6
25.8
30.8
42.4
43.0