Mitsubishi Electric MELSERVO-JN Series - 11.2 Regenerative options

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11. OPTIONS AND PERIPHERAL EQUIPMENT
11.2 Regenerative options
CAUTION
The specified combinations of regenerative options and servo amplifiers may only
be used. Otherwise, a fire may occur.
(1) Combination and regenerative power
The power values in the table are resistor-generated powers and not rated powers.
Servo amplifier
Regenerative power[W]
Built-in regenerative
resistor
MR-RB032
[40
]
MR-RB12
[40 ]
MR-JN-10A(1) 30
MR-JN-20A(1) 10 30 100
MR-JN-40A 10 30 100
(2) Selection of the regenerative option
Use the following method when regeneration occurs continuously in vertical motion applications or when it
is desired to make an in-depth selection of the regenerative option.
(a) Regenerative energy calculation
Friction
torque
Unbalance torque
T
F
T
U
M
( )
( )
t
1 t2 t3
Tpsa1 Tpsd1 Tpsa2 Tpsd2
t4
tf(1 cycle)
No
Up
Time
Servo motor speed
Generated torque
1)
2) 4)
5)
3)
6)
8)
7)
(Driving)
(Regenerative)
Down
Formulas for calculating torque and energy in operation
Regenerative power Torque applied to servo motor [N٠m] Energy [J]
1)
T1 =
(J
L JM) N0
9.55 x 10
4
1
T
psa1
TU TF
E
1 =
0.1047
2
N0 T1 Tpsa1
2)
T2 = TU + TF E2 = 0.1047 N0 T2 t1
3)
T3 =
(JL JM) N0
9.55 x 10
4
1
T
psa1
TU TF
E
3 =
0.1047
2
N0 T3 Tpsd1
4), 8)
T4 = TU E4 0(No regeneration)
5)
T5 =
(J
L JM) N0
9.55 x 10
4
1
T
psa2
TU TF
E
5 =
0.1047
2
N0 T5 Tpsa2
6)
T6 = TU TF E6 = 0.1047 N0 T6 t3
7)
T7 =
(JL JM) N0
9.55 x 10
4
1
T
psa2
TU TF
E
7 =
0.1047
2
N0 T7 Tpsd2
From the calculation results in 1) to 8), find the absolute value (Es) of the sum total of negative energies.