Frequency converters & VFDs

Dynamic braking resistors are used in Variable Frequency Drives (VFDs) to dissipate excess energy generated by the motor during deceleration or braking. When a motor is decelerating or braking, it acts as a generator, producing energy that needs to be dissipated. If this energy is not properly absorbed, it can cause overvoltage conditions within the VFD, potentially damaging the drive or connected equipment.Dynamic braking resistors safely dissipate this excess energy as heat, connected across the VFD’s DC bus and activated automatically during deceleration or braking. This protects the VFD and ensures smooth motor control system operation.