Mitsubishi Electric MR-J4, Instruction Manual

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11. OPTIONS AND AUXILIARY EQUIPMENT
11 - 11
(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
Inverse
efficiency [%]
Capacitor
charging [J]
Servo amplifier
Inverse
efficiency [%]
Capacitor
charging [J]
MR-J4-10A(-RJ) 55 9 MR-J4-60A4(-RJ) 85 12
MR-J4-20A(-RJ) 75 9 MR-J4-100A4(-RJ) 85 12
MR-J4-40A(-RJ) 85 11 MR-J4-200A4(-RJ) 85 25
MR-J4-60A(-RJ) 85 11 MR-J4-350A4(-RJ) 85 43
MR-J4-70A(-RJ) 85 18 MR-J4-500A4(-RJ) 90 45
MR-J4-100A(-RJ) 85 18 MR-J4-700A4(-RJ) 90 70
MR-J4-200A(-RJ) 85 36 MR-J4-11KA4(-RJ) 90 120
MR-J4-350A(-RJ) 85 40 MR-J4-15KA4(-RJ) 90 170
MR-J4-500A(-RJ) 90 45 MR-J4-22KA4(-RJ) 90 250
MR-J4-700A(-RJ) 90 70 MR-J4-10A1(-RJ) 55 4
MR-J4-11KA(-RJ) 90 120 MR-J4-20A1(-RJ) 75 4
MR-J4-15KA(-RJ) 90 170 MR-J4-40A1(-RJ) 85 10
MR-J4-22KA(-RJ) 90 250
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 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