Delta ASD-A2-0121 Series User Manual page 51

ASDA-A2
When the regenerative energy exceeds the capacity of the 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. When using an external regenerative resistor, please note that its resistance must be greater
than the resistance of the built-in regenerative resistor. For general application, you can
connect more than one resistor in series. If the value (from resistors connected in series)
exceeds the rated range, you can reduce the value by connecting the resistor in parallel.
If you want to connect the resistors in parallel to increase the power of the regenerative
resistor, please make sure the capacitance meets the requirements.
See the following diagram and settings for connecting the regenerative resistor in serial and
parallel.
External Regenerative Resistor
P
C
P
C
External Regenerative Resistor
P
1kW, 10Ω
C
3. In natural environment, if the capacity of the regenerative resistor (the average value) is within
the rated capacity, the temperature of the capacitance will increase to 120°C (248°F) or even
higher (under the condition of regenerative energy continues to function). 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 the external regenerative resistor
according to the selected linear motor or rotary motor.
2-12
1kW, 10Ω
External Regenerative Resistor
(serial connection)
1kW, 10Ω
1kW, 10Ω
(parallel connection)
1kW, 10Ω
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