Parameter Setting - Mitsubishi Electric MELSERVO-J4 Instruction Manual

9. OPTIONS AND PERIPHERAL EQUIPMENT
The following shows equations of the linear servo motor thrust and energy at the driving pattern
above.
From the calculation results in 1) to 8), find the absolute value (Es) of the sum total of negative
energies.
(b) Losses of servo motor and servo amplifier in regenerative mode
Refer to this section (1) (b) for inverse efficiency and Capacitor charging.
(c) generative energy calculation
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 resistor.
ER [J] = η • Es - Ec
From the total of ER's whose subtraction results are positive and a 1-cycle period, the power
consumption of the regenerative option can be calculated with the following expression.
Power consumption PR [W] total of positive ER's/1-cycle operation period (tf)
Select the regenerative option from the PR value. Regenerative option is not required when the
energy consumption is equal to or less than the built-in regenerative energy.

9.2.3 Parameter setting

Set [Pr. PA02] according to the option to be used.
0 0
Section
1) F
2) F
3) F
4), 8) F
5) F
6) F
7) F
[Pr. PA02]
Selection of regenerative option
00: Regenerative option is not used.
For servo amplifier of 0.6 kW to 7 kW, built-in regenerative resistor is used.
Supplied regenerative resistors or regenerative option is used with the servo amplifier
of 11 kW to 22 kW.
01: FR-BU2-H/FR-RC-H/FR-CV-H
80: MR-RB1H-4
81: MR-RB3M-4 (Cooling fan is required.)
82: MR-RB3G-4 (Cooling fan is required.)
83: MR-RB5G-4 (Cooling fan is required.)
84: MR-RB34-4 (Cooling fan is required.)
85: MR-RB54-4 (Cooling fan is required.)
91: MR-RB3U-4 (Cooling fan is required.)
92: MR-RB5U-4 (Cooling fan is required.)
FA: When the supplied regenerative resistors or the regenerative option is cooled by the
cooling fan to increase the ability with the servo amplifier of 11 kW to 22 kW.
Travel direction of linear servo motor
= (M + M ) • V/t + F
1 1 2 psa1 t
= F
2 1
= - (M + M ) • V/t + F
3 1 2 psd1 t
, F = 0
4 8
= (M + M ) • V/t + F
5 1 2 psa2 t
= F
6 t
= - (M + M ) • V/t + F
7 1 2 psd2 t
9 - 11
Energy E [J]
E = V/2 • F • t
1 1 psa1
E = V • F • t
2 2 1
E = V/2 • F • t
3 3 psd1
E , E = 0 (No regeneration)
4 8
E = V/2 • F • t
5 5 psa2
E = V • F • t
6 6 3
E = V/2 • F • t
7 7 psd2