Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 523

[Appendix 1] Summary of MR-J4_B_-RJ020 + MR-J4-T20
(2) Loss of the servo motor and the servo amplifier during regeneration
The efficiency of the servo motor and the servo amplifier during regeneration is shown below.
Servo amplifier
MR-J4-10B-RJ020
MR-J4-20B-RJ020
MR-J4-40B-RJ020
MR-J4-60B-RJ020
MR-J4-70B-RJ020
MR-J4-100B-RJ020
MR-J4-200B-RJ020
MR-J4-350B-RJ020
MR-J4-500B-RJ020
MR-J4-700B-RJ020
MR-J4-11KB-RJ020
MR-J4-15KB-RJ020
MR-J4-22KB-RJ020
Inverse efficiency (η): Efficiency including part of the servo motor and the servo amplifier when
C charge (Ec): Energy which charges the electrolytic capacitor within the servo amplifier.
Energy consumed by the regenerative option can be calculated from the value of the total of
regenerative energy multiplied by inverse efficiency from which C charge is subtracted.
ER [J] = η • Es - Ec
For energy consumption of regenerative option, select the desired option by calculating based on one
operating cycle fh [s].
PR [W] = ER/tf
Motor inverse
efficiency [%]
55
70
85
85
80
80
85
85
90
90
90
90
90
Converter unit
MR-J4-DU30KB-RJ020
MR-CR55K
MR-J4-DU37KB-RJ020
MR-J4-DU30KB4-RJ020
MR-J4-DU37KB4-RJ020
MR-CR55K-4
MR-J4-DU45KB4-RJ020
MR-J4-DU55KB4-RJ020
generating the rated (regenerative) torque at the rated rotation speed. Provide a
greater allowance by about 10% as the efficiency varies depending on the rotation
speed or generating torque.
Appendix 1-60
C charge [J] Servo amplifier
MR-J4-60B4-RJ020
9
MR-J4-100B4-RJ020
9
MR-J4-200B4-RJ020
11
MR-J4-350B4-RJ020
11
18 MR-J4-500B4-RJ020
MR-J4-700B4-RJ020
18
MR-J4-11KB4-RJ020
36
MR-J4-15KB4-RJ020
40
MR-J4-22KB4-RJ020
45
MR-J4-10B1-RJ020
70
MR-J4-20B1-RJ020
120
MR-J4-40B1-RJ020
170
250
Motor inverse
Drive unit
efficiency [%]
90
90
90
90
90
90
Motor inverse
C charge [J]
efficiency [%]
85
80
85
85
90
90
90 120
90 170
90 250
55
75
85
C charge [J]
450
450
450
450
450
450
12
12
25
43
45
70
4
4
10