Built-in Regenerative Resistor
When the output torque of servo motor in reverse direction of motor rotation speed, it
indicates that regenerative power has returned from the load to the servo drive. This
power will be transmitted into the capacitance of the DC Bus and result in rising voltage.
When the voltage rises too high, the servo system need to dissipate the extra energy by
using a regenerative resistor. The ASDA-A2 series servo drive provides a built-in
regenerative resistor which is equipped as standard (400W~5.5kW models only). Users
can also connect an external regenerative resistor if more regenerative capacity is needed.
The following table shows the specifications of the servo drive’s built-in regenerative
resistor and the amount of regenerative power (average value) that it can process.