MITSUBISHI ELECTRIC Merservo MR-J2S- B - Manual (Page 162)

12 - 3
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 55 9
MR-J2S-10B1 55 4
MR-J2S-20B 70 9
MR-J2S-20B1 70 4
MR-J2S-40B 85 11
MR-J2S-40A1 85 12
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 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) Parameter setting
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).
Selection of regenerative
00: Regenerative option is not used with 7kW or less servo amplifier
(The built-in regenerative resistor is used. However, the MR-J2S-10B does not
have a built-in regenerative resistor and therefore cannot use it.)
Supplied regenerative resistors or regenerative option is used with 11k to 22kW
servo amplifier
01: FR-RC, FR-BU2, FR-CV
05: MR-RB32
08: MR-RB30
09: MR-RB50(Cooling fan is required)
0B: MR-RB31
0C: MR-RB51(Cooling fan is required)
0E: When regenerative resistors or regenerative option supplied to 11k to 22kW are
cooled by cooling fans to increase capability
10: MR-RB032
11: MR-RB12
Parameter No.2
0 0