Delta ASD-A2 Series User Manual page 39

ASDA-A2
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
should not smaller than the 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.
Please refer to the followings for the calculation when serial / parallel connecting regenerative
resistors:
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.
2-10
Setting:
P1-52=10 (Ω)
P1-53=1000 (W)
Setting:
P1-52=20 (Ω)
P1-53=2000 (W)
Setting:
P1-52=5 (Ω)
P1-53=2000 (W)
Chapter 2 Installation
Revision February, 2017