Filter
Top Products
11. OPTIONS AND PERIPHERAL EQUIPMENT
11 - 10
(2) 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-JE-10B 55 11 MR-JE-100B 85 25
MR-JE-20B 75 11 MR-JE-200B 85 42
MR-JE-40B 85 14 MR-JE-300B 85 42
MR-JE-70B 85 25
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 one-cycle operation
period tf [s] to select the necessary regenerative option.
PR [W] = ER/tf
11.2.3 Parameter setting
Set [Pr. PA02] according to the option to be used.
Regenerative option selection
00: Regenerative option is not used.
For servo amplifier of 200 W or less, regenerative resistor is not used.
For servo amplifier of 0.4 kW to 3 kW, built-in regenerative resistor is used.
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50 (Cooling fan is required)
00
[Pr. PA02]