Selection Of Regenerative Resistor - Delta ASD-B2-1521-F User Manual

Chapter 2 Installation

2.7 Selection of Regenerative Resistor

When the direction of pull-out torque is different from the rotation, it means the electricity is
sent back to the servo drive from the load-end. It becomes the capacitance of DC Bus and
increases the voltage. When the voltage increases to a specific value, the come-back
eletricity can only be consumed by regenerative resistor. There is a built-in regenerative
resistor in the servo drive. Users can also use the external regenerative resistor if needed.
Specification of built-in regenerative resistor provided by ASDA-B2
Specification of built-in regenerative
Servo Drive
(kW)
Resistance
(P1-52) (Ohm)
0.1
0.2
0.4
0.75
1.0
1.5
2.0
3.0
*1 Regenerative Power Calculation: The amount of regenerative power (average value)
that can be processed is rated at 50% of the capacity of the servo drive's built-in
regenerative resistor. The regenerative power calculation method of external regenerative
resistor is the same.
When the regenerative resistor exceeds the capacity of built-in regenerative resistor, the
external regenerative resistor should be applied. Please pay special attention to the
followings when using the regenerative resistor.
1. Please correctly set up the resistance (P1-52) and capacity (P1-53) of regenerative
resistor. Or it might influence the performance of this function.
2. If users desire to use the external regenerative resistor, please make sure the applied
value is the same as the built-in regenerative resistor. If users desire to connect it in
parallel to increase the power of regenerative resistor, please make sure the
capacitance meets the requirements.
3. In natural environment, if the capacity of regenerative resistor (the average value) is
within the rated capacity, the temperature of the capacitance will increase to 120℃ or
even higher (under the condition of regenerative energy keeps existing). For safety
concerns, please apply the method of forced cooling in order to reduce the
temperature of regenerative resistor. Or, it is suggested to use the regenerative
2-12
resistor
Capacity
(P1-53) (Watt)
-
-
100 60
100 60
40 60
40 60
20 100
20 100
1
* The capacity of built-
in regenerative
resistor (Watt)
-
-
Min. Allowable
Resistance
(Ohm)
-
-
30
30
30
30
50
50
Revision May, 2018
ASDA-B2
60
60
60
60
30
30
15
15