Delta ASDA-A2 Series User Manual page 44

Chapter 2 Installation and Storage
 External Regenerative Resistor
When using an external regenerative resistor, connect it to P
circuit between P
with resistance values that follow the table above (Specifications of Built-in Regenerative
Resistors). We ignore the dissipative power of IGBT (Insulated Gate Bipolar Transistor) in
order to let the users easily calculate the capacity of regenerative resistor. In the following
sections, we will describe Regenerative Power Calculation Method and Simple Calculation
Method for calculating the regenerative power capacity of external regenerative resistors.
 Regenerative Power Calculation Method
(1) Without Load
When there is no external load torque, if the servo motor repeats operation, the returned
regenerative power generated when braking will transmitted into the capacitance of DC
bus. After the capacitance voltage exceeds some high value, regenerative resistor can
dissipate the remained regenerative power. Use the table and procedure described below
to calculate the regenerative power.
220V Series
Servo Drive
(kW)
0.1
0.2
0.4
Low
Inertia
0.75
1.0
2.0
0.4
1.0
1.5
Medium
Inertia
2.0
3.0
3.0
Medium-
4.5
High
5.5
Inertia
7.5
Revision September 2012
and D is open. We recommend using external regenerative resistors
Servo Motor
J (× 10
ECMA-C10402
ECMA-C10602
ECMA-C10604
ECMA-C10804
ECMA-C10807
ECMA-C11010
ECMA-C11020
ECMA-E11305
ECMA-E11310
ECMA-E11315
ECMA-E11320
ECMA-E11820
ECMA-F11830
ECMA-F11830
ECMA-F11845
ECMA-F11855
ECMA-F11875
Regenerative power
Rotor Inertia
from empty load
2
-4
3000r/min to stop Eo
)
kg.m
0.037
0.177
0.277
0.68
1.13
2.65
4.45
8.17
8.41
11.18
14.59
34.68
54.95
54.95
77.75
99.78
142.7
and C, and make sure the
regenerative
power of
capacitance Ec
(joule)
0.18
0.87
1.37
3.36
5.59
13.1
22.0
40.40
41.59
55.28
72.15
171.50
217.73
217.73
384.47
493.40
705.66
A2
ASDA-
Max.
(joule)
3
4
8
14
18
21
8
18
18
21
28
28
25
27
93
2-15