Mitsubishi Electric MELSERVO MR-J3-xT, Инструкция по эксплуатации

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14 - 19
14. OPTIONS AND AUXILIARY EQUIPMENT
Formulas for calculating torque and energy in operation
Regenerative power Torque applied to servo motor [N m] Energy [J]
1)
T
1
(J
L
J
M
)
9.55 10
4
N
0
1
T
psa1
T
U
T
F
E
1
2
0.1047
N
0
T
1
T
psa1
2) T
2
T
U
T
F
E
2
0.1047 N
0
T
2
t
1
3)
T
3
(J
L
J
M
)
9.55 10
4
N
0
1
T
psd1
T
U
T
F
E
3
2
0.1047
N
0
T
3
T
psd1
4), 8)
T
4
T
U
E
4
0 (No regeneration)
5) T
5
(J
L
J
M
)
9.55 10
4
N
0
1
T
psa2
T
U
T
F
E
5
2
0.1047
N
0
T
5
T
psa2
6) T
6
T
U
T
F
E
6
0.1047 N
0
T
6
t
3
7)
T
7
(J
L
J
M
)
9.55 10
4
N
0
1
T
psd2
T
U
T
F
E
7
2
0.1047 N
0
T
7
T
psd2
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
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-J3-10T 55 9
MR-J3-10T1 55 4
MR-J3-20T 70 9
MR-J3-20T1 70 4
MR-J3-40T 85 11
MR-J3-40T1 85 10
MR-J3-60T 85 11
MR-J3-70T 80 18
MR-J3-100T 80 18
MR-J3-200T 85 40
MR-J3-350T 85 40
MR-J3-500T 90 45
MR-J3-700T 90 70
MR-J3-11KT 90 120
MR-J3-15KT 90 170
MR-J3-22KT 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 generated 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 .............................................................................................(14.1)