Delta ASDA-A3 Series User Manual page 72

ASDA-A3
When the regenerative energy exceeds the capacity of the built-in regenerative resistor, use an
external regenerative resistor. Pay special attention to the following when using a regenerative
resistor:
1. Choose the correct resistance value (P1.052) and capacity (P1.053) settings for the
regenerative resistor; otherwise it might affect the performance.
2. When using an external regenerative resistor, ensure the total resistance value is greater
than the minimum allowable resistance value of the servo drive.
3. For general applications, you can connect more than one resistor in series. If the resistance
value (from resistors connected in series) exceeds the rated range, you can reduce the
value by connecting the resistors in parallel. If you want to connect the resistors in parallel
to increase the power of the regenerative resistors, make sure the resistance value meets
the requirements.
See the following diagrams and settings for connecting the regenerative resistors in series
and in parallel.
4. Normally, if the capacity of the regenerative resistor (the average value) is within the rated
capacity, the temperature of the resistor can increase to 120°C (248°F) or even higher
under the condition that the regenerative energy continues to function. For safety reasons,
apply forced cooling to reduce the temperature of the regenerative resistor. Alternatively,
you can use regenerative resistors equipped with thermal switches. Contact the
manufacturer for the load characteristics of the regenerative resistor.
Connect to one external regenerative resistor
Connect to external regenerative resistors (serial connection)
Connect to external regenerative resistors (parallel connection)
P1.052 = 10 (Ω)
P1.053 = 1000 (W)
P1.052 = 20 (Ω)
P1.053 = 2000 (W)
P1.052 = 5 (Ω)
P1.053 = 2000 (W)
Installation
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