Why your VFD trips on a fast stop (and what to do about it)

If a drive trips on overvoltage during a fast stop, the energy has to go somewhere.

When you decelerate a loaded motor quickly, the motor becomes a generator and pushes energy back into the drive's DC bus. If there's nowhere for it to go, the bus voltage climbs until the drive protects itself and trips.

The fixes are well understood: lengthen the ramp if the cycle allows, add a braking resistor to burn the energy, or use a regenerative drive to put it back on the line. Which one is right depends on how often you stop and how much energy is involved — that's the sizing conversation worth having before you buy.