Regeneration
Overview
Regeneration, or "shunting", dissipates energy from the DC bus during deceleration of the motor load. During deceleration, the motor acts as a generator that pumps energy back into the bus capacitors. If this energy is not dissipated, then the bus energy level can exceed acceptable levels (VBUS.OVFTHRESH). If the system exceeds the maximum bus voltage, then the drive generates an over voltage fault (
The following drive regen settings can be viewed and configured from the WorkBench Regen view.
| Button or Dialog Box | Description | Parameter |
|---|---|---|
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Regen Resistor Type |
Regen resistor type: Either -1-External Regen or 0-Internal Regen (if available). |
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External Regen Resistance |
External, user-defined regen resistor resistance (only visible for External Regen type). |
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External Regen Heat Up Time |
External regen resistor thermal protection time constant (only visible for External Regen type). |
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External Regen Power |
External regen resistor power fault level (only visible for External Regen type). |
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Regen Power |
Power dissipated by regen resistor. |
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| Regen Power Filtered | Power dissipated by regen resistor, filtered. | REGEN.POWERFILTERED |
Regen Resistor Options
To choose between internal and external regen resistor, select from the options in the Regen. Resistor Type drop-down box or set REGEN.TYPE in the terminal.
- Select "0-Internal Regen" to use the regen resistor provided with the drive. When this type is selected, the drive manages the resistor configuration. The external regen settings are hidden from view.
- Select "-1 External Regen" to use an external regen resistor. A standard resistor compatible with the drive model may be selected from the Select Resistor drop-down box. Optionally, a non-standard user defined resistor may be configured by setting External Regen Resistance (REGEN.REXT), External Regen Heat Up Time (REGEN.TEXT), and External Regen Power (REGEN.WATTEXT).
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If you use a nonstandard resistor, contact Kollmorgen technical support to confirm that the nonstandard resistor will work correctly with your system.
Standard External Regen Resistor Compatibility
The rows in the table below specify the standard external resistors provided as options in the Select Resistor drop-down box. The table shows the resistor parameters (REGEN.REXT, REG.TEXT, REGEN.WATTEXT) for reference, although the parameters are populated automatically when the resistor is selected. The table also shows compatibility of the resistors with different drive models. The values in the Drive Model Compatibility column corresponds to the five-character voltage rating/current rating/axis count field in the drive model string (see
All resistors in the table are UL-recognized. If you don not find a match for your application, please contact Kollmorgen customer support team for further assistance.
| NA Part Number | EU Part Number | Resistance (ohms) (REGEN.REXT) | Heat Up Time(s) (REGEN.TEXT) | Power Rating (W) (REGEN.WATTEXT) | Essentials Drive Model Compatibility |
|---|---|---|---|---|---|
| BAFP-85-33-S | - | 33 | 18.1 | 85 | 6V03S, 6V06S |
| BAFP-100-33 | - | 33 | 15.4 | 100 | 6V12S, 7VxxS |
