Selection Of Regenerative Resistor - Delta ASDA-B2-F Series User Manual

ASDA-B2-F
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-F Series
Servo Drive
(KW)
0.1
0.2
0.4
0.75
1.0
1.5
2.0
3.0
1
* The capacity of built-in regenerative resistor (average value) is 50% of the rated capacity of the built-in
regenerative resistor. The capacity of the external regenerative resistor is the same as the built-in one.
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 following 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
should not be smaller than the value of built-in regenerative resistor. In general application,
more than one resistor will be serial connected. If the value (from serial connected resistors)
exceeds the setting range, users can reduce the value by parallel connecting the 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 resistor which is equipped with thermal switches.
Please contact the distributors for load characteristics of the regenerative resistor.
When using the external regenerative resistor, the resistor should connect to P, C terminal and
the contact of P, D terminal should be opened. It is recommended to choose the above
mentioned capacitance. For easy calculation of regenerative resistor capacity, except the energy
consumed by IGBT, two ways are provided to select the capacity of external regenerative
resistor according to the selected linear motor or rotary motor.
September, 2015
Specification of built-in regenerative
resistor
Resistance
(P1-52) (Ohm) (P1-53) (Watt)
--
--
100
100
40
40
20
20
1
* The capacity of
built-in regenerative
Capacity
resistor (Watt)
--
--
60
60
60
60
100
100
Minimum
allowable
resistance (Ohm)
-- 60
-- 60
30 60
30 60
30 30
30 30
50 15
50 15
Installation
2
2-7