Delta ASD-B2-0121-F, User Manual

Page: 25 / 291

Installation ASDA-B2-F
2-8
September, 2015
2
(1) Regenerative Power Selection
(a) When the external load on torque does not exist
If the motor operates back and forth, the energy generated by the brake will go into the
capacitance of DC bus. When the voltage of the capacitance exceeds a specific value, the
redundant energy will be consumed by regenerative resistor. Two ways of selecting
regenerative resistor are provided here. The table below provides the energy calculation
method. Users can refer to it and calculate the selected regenerative resistor.
Servo Drive
(kW)
Motor
Rotor Inertia
J (× 10
-4
kg.m
2
)
Regenerative power
from empty load
3000r/min to stop Eo
(joule)
The maximum
regenerative power
of capacitance
Ec (joule)
Low Inertia
0.1
ECMA-C
ᇞ
040F
□□
0.021 0.10 4.21
ECMA-C
ᇞ
0401
□□
0.037 0.18 4.21
0.2 ECMA-C
ᇞ
0602
□□
0.177 0.87 5.62
0.4
ECMA-C
ᇞ
0604
□□
0.277 1.37 8.42
ECMA-C
ᇞ
0804
□□
0.68 3.36 8.42
0.75
ECMA-C
ᇞ
0807
□□
1.13 5.59 17.47
ECMA-C
ᇞ
0907
□□
1.93 9.54 17.47
1.0
ECMA-C
ᇞ
0910
□□
2.62 12.96 21.22
ECMA-C
ᇞ
1010
□□
2.65 13.1 21.22
2.0 ECMA-C
ᇞ
1020
□□
4.45 22.0 25.58
3.0
ECMA-C
ᇞ
1330
□□
12.7 62.80 25.58
Medium
Inertia
0.4 ECMA-E
ᇞ
1305
□□
8.17 40.40 8.42
1.0 ECMA-E
ᇞ
1310
□□
8.41 41.59 21.22
1.5 ECMA-E
ᇞ
1315
□□
11.18 55.29 25.58
2.0
ECMA-E
ᇞ
1320
□□
14.59 72.15 25.58
ECMA-E
ᇞ
1820
□□
34.68 171.49 25.58
3.0 ECMA-E
ᇞ
1830
□□
54.95 217.73 31.20
Medium -
High Inertia
1.0
ECMA-F
ᇞ
1308
□□
13.6 67.25 21.22
2.0 ECMA-F
ᇞ
1313
□□
20.0 98.90 25.58
3.0 ECMA-F
ᇞ
1830
□□
54.95 217.73 28
High Inertia
0.4 ECMA-G
ᇞ
1303
□□
8.17 17.96 8.42
0.75 ECMA-G
ᇞ
1306
□□
8.41 18.48 17.47
1.0 ECMA-G
ᇞ
1309
□□
11.18 24.57 21.22
Eo = J * Wr
2
/182 (joule), Wr: r/min
Assume that the load inertia is N times to the motor inertia and the motor decelerates from 3000
r/min to 0, its regenerative energy is (N+1) x Eo. The consumed regenerative resistor is (N+1) ×
Eo - Ec
joule . If the cycle of back and forth operation is T sec, then the power of regenerative
resistor it needs is 2× ((N+1) x Eo - Ec) / T.
Steps Item Calculation and Setting Method
1 Set the capacity of regenerative resistor to the maximum Set P1-53 to the maximum value
2 Set T cycle of back and forth operation Enter by the user
3 Set the rotational speed wr Enter by the user or read via P0-02
4 Set the load/motor inertia ratio N Enter by the user or read via P0-02
5 Calculate the maximum regenerative energy Eo Eo= J * wr
2
/182
6 Set the absorbable regenerative energy Ec Refer to the above table
7 Calculate the needful capacitance of regenerative resistor
2 ×
（
(N+1) × Eo
－
Ec
）
/ T