Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 279

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-JN-10A
MR-JN-10A1
MR-JN-20A
MR-JN-20A1
MR-JN-40A
Inverse efficiency ( )
Capacitor charging (Ec)
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.
Calculate the power consumption of the regenerative option on the basis of single-cycle operation period tf [s]
to select the necessary regenerative option.
(3) Parameter setting
Set parameter No. PA02 according to the regenerative option to be used.
Parameter No. PA02
0
Inverse efficiency[%] Capacitor charging[J]
55
55
70
70
85
: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%.
:Energy charged into the electrolytic capacitor in the servo amplifier.
ER [J] Es Ec
PR [W] ER/tf
Selection of regenerative option
00: Regenerative option is not used
For servo amplifier of 100W, regenerative resistor is not used.
For servo amplifier of 200 to 400W, built-in regenerative resistor is used.
02: MR-RB032
03: MR-RB12
9
4
9
4
11
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