11. OPTIONS AND PERIPHERAL EQUIPMENT
11 - 6
(2) 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]
Servo
amplifier
Inverse
efficiency [%]
Capacitor
charging [J]
MR-JE-10A 55 11
MR-JE-100A
85 25
MR-JE-20A 75 11
MR-JE-200A
85 42
MR-JE-40A 85 14
MR-JE-300A
85 42
MR-JE-70A 85 25
Inverse efficiency (
η
m
): Efficiency including some efficiencies of the servo motor and servo amplifier
when rated (regenerative) torque is generated at rated speed. Efficiency
varies with the speed and generated torque. Since the characteristics of the
electrolytic capacitor change with time, allow for approximately 10% higher
inverse efficiency.
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] =
η
m
• Es - Ec
Select a necessary regenerative option by calculating the power consumption of the regenerative
option on the basis of one-cycle operation period tf [s].
PR [W] = ER/tf
11.2.3 Parameter setting
Set [Pr. PA02] according to the option to be used.
Regenerative option selection
00: Regenerative option is not used.
For servo amplifier of 200 W or less, regenerative resistor is not used.
For servo amplifier of 0.4 kW to 3 kW, built-in regenerative resistor is used.
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50 (Cooling fan is required)
0 0
[Pr. PA02]
Summary of Contents for MR-JE-_A
Page 9: ...A 8 MEMO ...
Page 15: ...6 MEMO ...
Page 29: ...1 FUNCTIONS AND CONFIGURATION 1 14 MEMO ...
Page 139: ...4 STARTUP 4 38 MEMO ...
Page 187: ...5 PARAMETERS 5 48 MEMO ...
Page 221: ...6 NORMAL GAIN ADJUSTMENT 6 34 MEMO ...
Page 259: ...8 TROUBLESHOOTING 8 8 MEMO ...
Page 265: ...9 DIMENSIONS 9 6 MEMO ...
Page 273: ...10 CHARACTERISTICS 10 8 MEMO ...
Page 339: ...12 COMMUNICATION FUNCTION MITSUBISHI ELECTRIC GENERAL PURPOSE AC SERVO PROTOCOL 12 34 MEMO ...