For AC VFD and DC drive applications such as offshore cranes, draw-works systems, etc. which have overhauling loads the use of dynamic braking resistors are highly recommended.

The motor/load excess kinetic energy is dissipated across the resistor bank via the VFDs internal or optional dynamic braking unit to maintain control when overhauling and to prevent drive tripping from overvoltage.

DB resistor

For information on dynamic braking resistors for AC VFD and DC SCR drives click here – Dynamic braking resistors