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11. OPTIONS AND AUXILIARY EQUIPMENT
(b) Losses of servo motor and servo amplifi er in regenerative mode
The following table lists the efficiencies and ot her data of the servo motor and servo amplifier in the
regenerative mode.
Servo amplifier Inverse efficiency[%] Capacitor charging[J] Servo amplifier Inverse eff iciency[%] Capacitor charging[J]
MR-J3-10B 55 9 MR-J3-200B 85 40
MR-J3-10B1 55 4 MR-J3-200B4 85 25
MR-J3-20B 70 9 MR-J3-350B 85 40
MR-J3-20B1 70 4 MR-J3-350B4 85 36
MR-J3-40B 85 11 MR-J3-500B(4) 90 45
MR-J3-40B1 85 10 MR-J3-700B(4) 90 70
MR-J3-60B(4) 85 11 MR-J3-11KB (4) 90 120
MR-J3-70B 80 18 MR-J3-15KB(4) 90 170
MR-J3-100B 80 18 MR-J3-22KB(4) 90 250
MR-J3-100B4 80 12
Inverse efficiency ( ) : Efficiency including some efficiencies of the servo motor and servo amplifier
when rated (regenerative) torque is generated at rate d speed. Since the
efficiency varies with the speed and generated t orque, allow for about 10%.
Capacitor charging (Ec) : Energy charged into t he electrolytic capacitor in the servo amplifier .
Subtract the capacitor charging from the r esult of multiplying the sum total of regenerative energ ies by
the inverse efficiency to calculate the energ y consumed by the regenerative option.
ER [J] Es Ec
Calculate the power consumption of the regenerati ve option on the basis of single-cycle operation
period tf [s] to select the necessary regenerat ive option.
PR [W] ER/tf
(3) Parameter setting
Set parameter No.PA02 according to the option t o be used.
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 7kW, built-in regenerative resistor is used.
Supplied regenerative resistors or regenerative option is used with
the servo amplifier of 11k to 22kW.
For a drive unit of 30kW or more, select regenerative option by the
converter unit.
01: FR-BU2-(H) FR-RC-(H) FR-CV-(H)
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50(Cooling fan is required)
08: MR-RB31
09: MR-RB51(Cooling fan is required)
80: MR-RB1H-4
81: MR-RB3M-4(Cooling fan is required)
82: MR-RB3G-4(Cooling fan is required)
83: MR-RB5G-4(Cooling fanis required)
84: MR-RB34-4(Cooling fanis required)
85: MR-RB54-4(Cooling fanis required)
FA: Whenhe supplied regenerative resistor is cooled by the cooling fan to
increase the ability with the servo amplifier of 11k to 22kW.
00
Parameter No.PA02