Overvoltage During Deceleration

What does ObF mean?

This fault occurs when the DC bus voltage rises above its safe limit during motor deceleration, typically due to kinetic energy being regenerated back to the drive from a sudden stop or an overhauling load. Without proper energy dissipation, this can damage the drive's DC bus components.

Complete Troubleshooting Guide

1. 1

   Increase the deceleration time parameter in the drive settings to allow the motor to slow down more gradually.

2. 2

   For applications with high inertia or overhauling loads, install an external braking resistor to dissipate regenerated energy.

3. 3

   Activate the 'brA' function (if available and compatible with the application) to utilize advanced braking capabilities.