Chopper
Overvoltages are no longer dissipated in case of overtemperature. Defect possible due to overvoltage.
- Monitor the bit I2T warning in order to recognize a temperature increase in good time.
- If necessary, disable the drive if the bit I2T error is TRUE.
The chopper is automatically activated when the voltage UP exceeds the limit value "Chopper threshold overvoltage". The chopper controls the current through the braking resistor such that the voltage UP does not increase further.
The chopper is automatically deactivated when the voltage UP has dropped again by the "Chopper hysteresis voltage".
Parameter
Index | Name | Description | Data type | Flags | Default |
|---|---|---|---|---|---|
8000:11 | Chopper threshold overvoltage | The Chopper is switched on if the voltage UP exceeds this value. Unit: mV. | UINT32 | RW | 50000dec |
8000:13 | Chopper hysteresis voltage | Hysteresis voltage for switching off the Chopper. Unit: mV. | UINT32 | RW | 1000dec |
The following diagram shows the influence of the parameters on an exemplary curve of the voltage UP:
