Mitsubishi Electric MR-J3-B Instruction Manual page 184

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-J3-10B
MR-J3-10B1
MR-J3-20B
MR-J3-20B1
MR-J3-40B
MR-J3-40B1
MR-J3-60B
MR-J3-70B
MR-J3-100B
MR-J3-200B
MR-J3-350B
MR-J3-500B
MR-J3-700B
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 brake option.
Calculate the power consumption of the regenerative brake option on the basis of single-cycle operation period
tf [s] to select the necessary regenerative brake option.
(3) Connection of the regenerative brake option
Set parameter No. PA02 according to the open to be used.
Parameter No. PA02
Inverse efficiency[%]
55
55
70
70
85
85
85
80
80
85
85
90
90
: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
PR [W] ER/tf .............................................................................................(11.1)
Selection of regenerative
00: Regenerative brake option is not used
For MR-J3-10B, regenerative brake resistor is not used.
For MR-J3-20B, built-in regenerative brake resistor is used.
01: MR-BU MR-RC
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50
08: MR-RB31
09: MR-RB51
Capacitor charging[J]
9
4
9
4
11
10
11
18
18
40
40
45
70
Ec
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