Parameter Setting - Mitsubishi MR-JE-10B Instruction Manual

11. OPTIONS AND PERIPHERAL EQUIPMENT
(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.
Inverse efficiency (η
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
• Es - Ec
m
Calculate the power consumption of the regenerative option on the basis of one-cycle operation
period tf [s] to select the necessary regenerative option.
PR [W] = ER/tf

11.2.3 Parameter setting

Set [Pr. PA02] according to the option to be used.
Inverse
Servo amplifier
efficiency [%]
MR-JE-10B 55
MR-JE-20B 75
MR-JE-40B 85
MR-JE-70B 85
): Efficiency including some efficiencies of the servo motor and servo amplifier
m
when rated (regenerative) torque is generated at rated speed. The efficiency
varies with the speed and generated torque. In addition, the characteristics of
the electrolytic capacitor change over the years, and thus the inverse
efficiency should have a large margin of approximately 10%.
[Pr. PA02]
0 0
Regenerative option selection
00: Regenerative option is not used.
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50 (Cooling fan is required)
Capacitor
Servo amplifier
charging [J]
11 MR-JE-100B
11 MR-JE-200B
14 MR-JE-300B
25
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.
11 - 10
Inverse Capacitor
efficiency [%] charging [J]
85 25
85 42
85 42