The braking chopper and resistors require additional space.

Braking choppers are appropriate when:

Braking choppers are typically dimensioned for a certain cycle, e.g. 100% power 1/10 minutes, long braking times require more accurate dimensioning of the braking chopper.

A braking chopper is an electrical switch that limits the DC bus voltage by switching the braking energy to a resistor where the braking energy is converted to heat.

Braking choppers some times also referred to as braking unit are used in the DC voltage intermediate circuits of frequency converters to control voltage when the load feeds energy back to the intermediate circuit.