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12. 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-10B(1) 55 9
MR-J2S-20B(1) 70 9
MR-J2S-40B(1) 85 11
MR-J2S-60B 85 11
MR-J2S-70B 80 18
MR-J2S-100B 80 18
MR-J2S-200B 85 40
MR-J2S-350B 85 40
MR-J2S-500B 90 45
MR-J2S-700B 90 70
MR-J2S-11KB 90 120
MR-J2S-15KB 90 170
MR-J2S-22KB 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 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 brake option.
ER [J]
Es Ec
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.
PR [W]
ER/tf............................................................................................(12.1)
(3) Parameter setting
Set parameter No.2 according to the option to be used.
The MR-RB65, 66 and 67 are regenerative brake options that have encased the GRZG400-2
,
GRZG400-1
and GRZG400-0.8 , respectively. When using any of these regenerative brake options,
make the same parameter setting as when using the GRZG400-2
, GRZG400-1 or GRZG400-0.8
(supplied regenerative brake resistors or regenerative brake option is used with 11kW or more servo
amplifier).
Parameter No.2
Selection of regenerative
00: Regenerative brake option is not used with 7kW or less servo amplifier
(The built-in regenerative brake resistor is used. However, the MR-J2S-10B
does not have a built-in regenerative brake resistor and therefore cannot use it.)
Supplied regenerative brake resistors or regenerative brake option is
used with 11kW or more servo amplifier
01: FR-RC, FR-RB, FR-CV
05: MR-RB32
08: MR-RB30
09: MR-RB50
0B: MR-RB31
0C: MR-RB51
0E: When regenerative brake resistors or regenerative brake option supplied
to 11kW or more are cooled by fans to increase capability
10: MR-RB032
11: MR-RB12