Overbraking

What does ObF mean?

Indicates an overbraking condition. This occurs when the motor is regenerating too much energy back into the drive, exceeding the drive's ability to dissipate it, often due to rapid deceleration or an overhauling load. This can cause the DC bus voltage to rise excessively, potentially damaging the drive.

Complete Troubleshooting Guide

1. 1

   Increase the deceleration ramp time in the drive's parameters to reduce regenerative energy.

2. 2

   Install or verify the sizing and operation of a dynamic braking resistor if applicable.

3. 3

   Check for external mechanical forces on the motor that might be causing regeneration (e.g., gravity on a descending load).

4. 4

   Reduce the maximum braking torque limit if configured in the drive settings.