To reduce motor overload when a heavily loaded drive has to be repeatedly started, what device can be used?

Using a centrifugal coupling is an effective approach to help mitigate motor overload when a heavily loaded drive requires frequent starts. This device operates based on the principles of centrifugal force, allowing it to engage and disengage the load from the motor at startup. As the motor starts, the coupling remains disengaged until it reaches a certain speed, at which point the centrifugal force activates it, connecting the motor to the load.

This process significantly reduces the initial torque demand on the motor during startup. By allowing the motor to accelerate without the full load immediately applied, the centrifugal coupling helps prevent motor overload conditions that could arise from trying to start a heavy load directly. This feature is especially beneficial in applications where the motor experiences high inertia or requires multiple starts in a short timeframe, as it can enhance the longevity of the motor and improve overall operational efficiency.

Other options may provide alternative methods of addressing motor performance, but they do not offer the same specific benefit of primarily targeting the reduction of overload during the startup phase.