Mitsubishi MR-J4-10A Instruction Manual page 340

11. OPTIONS AND AUXILIARY 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-J4-10A(-RJ)
MR-J4-20A(-RJ)
MR-J4-40A(-RJ)
MR-J4-60A(-RJ)
MR-J4-70A(-RJ)
MR-J4-100A(-RJ)
MR-J4-200A(-RJ)
MR-J4-350A(-RJ)
MR-J4-500A(-RJ)
MR-J4-700A(-RJ)
MR-J4-11KA(-RJ)
MR-J4-15KA(-RJ)
MR-J4-22KA(-RJ)
Inverse efficiency (η): Efficiency including some efficiencies of the servo motor and servo amplifier
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
75
85
85
85
85
85
85
90
90
90
90
90
when rated (regenerative) torque is generated at rated speed. Since the
efficiency varies with the speed and generated torque, allow for about 10%.
11 - 9
Servo amplifier
9 MR-J4-60A4(-RJ)
9 MR-J4-100A4(-RJ)
11 MR-J4-200A4(-RJ)
11 MR-J4-350A4(-RJ)
18 MR-J4-500A4(-RJ)
18 MR-J4-700A4(-RJ)
36 MR-J4-11KA4(-RJ)
40 MR-J4-15KA4(-RJ)
45 MR-J4-22KA4(-RJ)
70
120
170
250
Inverse Capacitor
efficiency [%] charging [J]
85 12
85 12
85 25
85 43
90 45
90 70
90 120
90 170
90 250