ASDA-B2 User-Manual(E)CURVE.cdr - Delta Electronics
ASDA-B2 User-Manual(E)CURVE.cdr - Delta Electronics
ASDA-B2 User-Manual(E)CURVE.cdr - Delta Electronics
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<strong>ASDA</strong>-<strong>B2</strong><br />
Chapter 2 Installation and Storage<br />
2.7 Regenerative Resistor<br />
Built-in Regenerative Resistor<br />
When the output torque of servo motor in reverse direction of motor rotation speed, it<br />
indicates that there is a regenerative power returned from the load to the servo drive. This<br />
power will be transmitted into the capacitance of DC Bus and result in rising voltage. When<br />
the voltage has risen to some high voltage, the servo system need to dissipate the extra<br />
energy by using a regenerative resistor. <strong>ASDA</strong>-<strong>B2</strong> series servo drive provides a built-in<br />
regenerative resistor and the users also can connect to external regenerative resistor if more<br />
regenerative capacity is needed.<br />
The following table shows the specifications of the servo drive’s built-in regenerative resistor<br />
and the amount of regenerative power (average value) that it can process.<br />
Built-in Regenerative Resistor Specifications<br />
Regenerative Power<br />
Resistance (Ohm) Capacity (Watt) processed by built-in<br />
(parameter P1-52) (parameter P1-53) regenerative resistor<br />
(Watt) * 1<br />
0.1 - - - 60<br />
0.2 - - - 60<br />
0.4 100 60 30 60<br />
0.75 100 60 30 60<br />
1.0 40 60 30 30<br />
Servo Drive<br />
(kW)<br />
Min. Allowable<br />
Resistance<br />
(Ohm)<br />
1.5 40 60 30 30<br />
2.0 40 60 30 15<br />
3.0 40 60 30 15<br />
*1 Regenerative Power Calculation: The amount of regenerative power (average value) that<br />
can be processed is rated at 50% of the capacity of the servo drive's built-in regenerative<br />
resistor. The regenerative power calculation method of external regenerative resistor is the<br />
same.<br />
When the regenerative power exceeds the processing capacity of the servo drive, install an<br />
external regenerative resistor. Please pay close attention on the following notes when using a<br />
regenerative resistor.<br />
1. Make sure that the settings of resistance (parameter P1-52) and capacity (parameter P1-<br />
53) is set correctly.<br />
2. When the users want to install an external regenerative resistor, ensure that its<br />
resistance value is the same as the resistance of built-in regenerative resistor. If<br />
combining multiple small-capacity regenerative resistors in parallel to increase the<br />
regenerative resistor capacity, make sure that the resistance value of the regenerative<br />
resistor should comply with the specifications listed in the above table.<br />
3. In general, when the amount of regenerative power (average value) that can be<br />
processed is used at or below the rated load ratio, the resistance temperature will<br />
Revision January 2012 2-9
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