Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 302

11. OPTIONS AND PERIPHERAL EQUIPMENT
(b) Losses of servo motor and servo amplifier in regenerative mode
The following table lists the efficiencies and other data of the servo motor and servo amplifier in the
regenerative mode.
Servo amplifier
MR-J4-10TM
MR-J4-20TM
MR-J4-40TM
MR-J4-60TM
MR-J4-70TM
MR-J4-100TM
MR-J4-200TM
MR-J4-350TM
MR-J4-500TM
MR-J4-700TM
MR-J4-11KTM
MR-J4-15KTM
MR-J4-22KTM
Inverse efficiency (η): Efficiency including some efficiencies of the servo motor and servo amplifier
when rated (regenerative) torque is generated at rated speed. Since the efficiency varies
with the servo motor speed and generated torque, allow for about 10%.
Capacitor charging (Ec): Energy charged into the electrolytic capacitor in the servo amplifier
Subtract the capacitor charging from the result of multiplying the sum total of regenerative energies
by the inverse efficiency to calculate the energy consumed by the regenerative option.
ER [J] = η • Es - Ec
Calculate the power consumption of the regenerative option on the basis of single-cycle operation
period tf [s] to select the necessary regenerative option.
PR [W] = ER/tf
Inverse Capacitor
efficiency [%] charging [J]
55 9
75 9
85 11
85 11
85 18
85 18
85 36
85 40
90 45
90 70
90 120
90 170
90 250
11 - 9
Inverse
Servo amplifier
efficiency [%]
MR-J4-60TM4 85
MR-J4-100TM4 85
MR-J4-200TM4 85
MR-J4-350TM4 85
MR-J4-500TM4 90
MR-J4-700TM4 90
MR-J4-11KTM4 90
MR-J4-15KTM4 90
MR-J4-22KTM4 90
MR-J4-10TM1 55
MR-J4-20TM1 75
MR-J4-40TM1 85
Capacitor
charging [J]
12
12
25
43
45
70
120
170
250
4
4
10