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 system. 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 (F501n501 ) and shuts down. A regeneration resistor, or regen resistor, is an external device that dissipates excess energy and allows the drive to function normally during deceleration.
Follow these steps to determine the regen needs for your system and to configure the drive for regen:
- Calculate motor peak and continuous regenerative energy and use this value to size the regen resistor.
- Select a compatible regen resistor.
- Configure regen parameter values in WorkBench.
From the Regen view, the following drive regen settings can be viewed and configured.
| Button or Dialog Box | Description | Parameter |
|---|---|---|
|
Regen Resistor Type |
Sets the regen resistor type to either -1-External Regen or 0-Internal Regen (if available). |
|
|
External Regen Resistance |
Sets the external, user-defined regen resistor resistance (only visible for external regen). |
|
|
External Regen Heat Up Time |
Sets the external regen resistor thermal protection time constant (only visible for external regen). |
|
|
External Regen Power |
Sets the regen resistor's power fault level for an external regen resistor (only visible for external regen). |
|
|
Regen Power |
Reads the regen power (only visible for external regen). |
Regen Resistor Options
Select "-1 External Regen" from the Regen. Resistor Type box (REGEN.TYPE) to view the Select Resistor drop-down box.
The Select resistor drop-down contains pre-sized resistors for your drive. Select the model regen resistor that you are using and the drive will populate the remainder of the fields. If you are using a nonstandard resistor, then choose <User defined> and fill in the appropriate values for your resistor.
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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.
Regen diagnostic
The AKD detects the following error conditions if the external regen resistor is configured:
- Short circuit detected by hardware. This creates fault "F519 ".
- Open circuit detected by REGEN.TEST command. This creates fault "F634".
- Wrong configuration detected by REGEN.TEST command. This creates fault "F634".
Calculating Motor Peak Energy and Regen Resistor Size
In order to determine whether or not your system requires a regen resistor, you must calculate the peak kinetic energy that the motor generates during deceleration and the continuous regeneration energy created by the motor. If this energy exceeds the drive capacity, then you need a regen resistor. In many cases, peak or continuous regenerated energy does not exceed the drive capacity and no regen resistor is needed.
The calculation for peak kinetic energy requires values for several factors that affect the generation of energy in a motion system:
- Load inertia
- Motor inertia
- Motor speed from which deceleration occurs
- Time required to decelerate
Regen resistor sizing information for your particular application can be calculated using the Motioneering® Application Engine. You can access the application here:
https://www.kollmorgen.com/en-us/service-and-support/technical/motioneering-online/
After you install and set up this program, highlight your application (1) and then click on the Power Supply Sizing icon (2).
The application then displays the regen sizing tool; see the application help for further sizing assistance.
Selecting a Compatible Regen Resistor
After you calculate the appropriate resistor size, compare the results with the capabilities of the drive and, if necessary, select an external regeneration resistor which matches these capabilities from the chart below. The resistors shown below are included in the WorkBench setup. If you do not find a match for your application, please contact the Kollmorgen customer support team for further assistance.
| NA Part Number |
EU Part Number |
Resistor Type |
AKD-x00306 |
AKD-x00606 |
AKD-x01206 |
AKD-x02406 |
AKD-x00307 |
AKD-x00607 |
AKD-x01207 |
AKD-x02407 |
|---|---|---|---|---|---|---|---|---|---|---|
|
BAFP-100-33 |
DE-201437 |
External Resistor, 100 W, 33 ohms |
x |
x |
x | x | x | |||
|
BAFP-200-33 |
DE-201438 |
External Resistor, 200 W, 33 ohms |
x |
x |
x | x | x | |||
|
BAR-250-33 |
DE-106254 |
External Resistor, 250 W, 33 ohms |
x |
x |
x |
x |
x |
|||
|
BAR-500-33 |
DE-106255 |
External Resistor, 500 W, 33 ohms |
x |
x |
x |
x |
x |
|||
|
BAR-1500-33 |
DE-106258 |
External Resistor, 1500 W, 33 ohms |
x |
x |
x |
x |
x |
|||
|
BAS-3000-33 |
DE-201407 |
External Resistor, 3000 W, 33 ohms |
x |
x |
x |
x |
x |
|||
|
BAR-600-23 |
DE-200613 |
External Resistor, 600 W, 23 ohms |
x |
|||||||
|
BAR-1000-23 |
DE-200614 |
External Resistor, 1000 W, 23 ohms |
x |
|||||||
|
BAS-2000-23 |
DE-200615 |
External Resistor, 2000 W, 23 ohms |
x |
|||||||
|
BAS-3000-23 |
DE-200616 |
External Resistor, 3000 W, 23 ohms |
x |
|||||||
|
BAS-4000-23 |
DE-200617 |
External Resistor, 4000 W, 23 ohms |
x |
|||||||
|
BAR-500-15 |
DE-201439 |
External Resistor, 500 W, 15 ohms |
x |
x | ||||||
|
BAR-1000-15 |
DE-201440 |
External Resistor, 1000 W, 15 ohms |
x |
x | ||||||
|
BAS-2000-15 |
DE-103871 |
External Resistor, 2000 W, 15 ohms |
x |
x | ||||||
|
BAS-3000-15 |
DE-103872 |
External Resistor, 3000 W, 15 ohms |
x |
x | ||||||
|
BAS-6000-15 |
DE-103873 |
External Resistor, 6000 W, 15 ohms |
x |
x |
Configuring Regen Parameter Values
If you use an external regen resistor, then you must configure three regen parameter values. These values are automatically inserted in WorkBench if the resistor is pre-sized. The chart below summarizes these three additional values:
- External Regen Resistance (REGEN.REXT, ohms)
- External Regen Heat Up Time (REGEN.TEXT, seconds)
- External Regen Power (REGEN.WATTEXT, watts)
These parameters allow the regen resistor to function properly and dissipate power appropriately for your system.
|
NA Part Number |
EU Part Number |
Resistor Type (all resistors UL recognized) |
Resistance ohms (REGEN.REXT) |
Heat Up Time s (REGEN.TEXT) |
Power Rating W (REGEN.WATTEXT) |
|---|---|---|---|---|---|
| BAFP-100-33 | DE-201437 | External Resistor, 100 W, 33 ohms |
33 |
16.5 |
100 |
| BAFP-200-33 | DE-201438 | External Resistor, 200 W, 33 ohms |
33 |
27.5 |
200 |
| BAR-250-33 | DE-106254 | External Resistor, 250 W, 33 ohms |
33 |
22.0 |
250 |
| BAR-500-33 | DE-106255 | External Resistor, 500 W, 33 ohms |
33 |
33.0 |
500 |
| BAR-1500-33 | DE-106258 | External Resistor, 1500 W, 33 ohms |
33 |
25.7 |
1,500 |
| BAS-3000-33 | DE-201407 | External Resistor, 3000 W, 33 ohms |
33 |
77.0 |
3,000 |
| BAR-600-23 | DE-200613 | External Resistor, 600 W, 23 ohms |
23 |
27.5 |
600 |
| BAR-1000-23 | DE-200614 | External Resistor, 1000 W, 23 ohms |
23 |
27.5 |
1,000 |
| BAS-2000-23 | DE-200615 | External Resistor, 2000 W, 23 ohms |
23 |
77.0 |
2,000 |
| BAS-3000-23 | DE-200616 | External Resistor, 3000 W, 23 ohms |
23 |
84.3 |
3,000 |
| BAS-4000-23 | DE-200617 | External Resistor, 4000 W, 23 ohms |
23 |
77.0 |
4,000 |
| BAR-500-15 | DE-201439 | External Resistor, 500 W, 15 ohms |
15 |
33.0 |
500 |
| BAR-1000-15 | DE-201440 | External Resistor, 1000 W, 15 ohms |
15 |
27.5 |
1,000 |
| BAS-2000-15 | DE-103871 | External Resistor, 2000 W, 15 ohms |
15 |
77.0 |
2,000 |
| BAS-3000-15 | DE-103872 | External Resistor, 3000 W, 15 ohms |
15 |
84.3 |
3,000 |
| BAS-6000-15 | DE-103873 | External Resistor, 6000 W, 15 ohms |
15 |
91.7 |
6,000 |
Related Parameters
