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13. 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 Inverse efficiency[%] Capacitor charging[J]
MR-J2S-10A 55 9
MR-J2S-10A1 55 4
MR-J2S-20A 70 9
MR-J2S-20A1 70 4
MR-J2S-40A 85 11
MR-J2S-40A1 85 12
MR-J2S-60A 85 11
MR-J2S-70A 80 18
MR-J2S-100A 80 18
MR-J2S-200A 85 40
MR-J2S-350A 85 40
MR-J2S-500A 90 45
MR-J2S-700A 90 70
MR-J2S-11KA 90 120
MR-J2S-15KA 90 170
MR-J2S-22KA 90 250
Inverse efficiency ( ) :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]
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
(3) Connection of the regenerative option
Set parameter No.2 according to the option to be used.
The MR-RB65, 66 and 67 are regenerative options that have encased the GRZG400-2
, GRZG400-1
and GRZG400-0.8 , respectively. When using any of these regenerative options, make the same
parameter setting as when using the GRZG400-2
, GRZG400-1 or GRZG400-0.8 (supplied
regenerative resistors or regenerative option is used with 11kW or more servo amplifier).
Parameter No.0
Selection of regenerative
00: Regenerative option or regenerative option is not used with 7kW or
less servo amplifier
Supplied regenerative resistors or regenerative option is used with
11kW or more servo amplifier
01: FR-RC, FR-BU2, FR-CV
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)
0E: When regenerative resistors supplied to 11kW or more are cooled by
cooling fans to increase capability