soft starter

A soft starter is an electronic device used to reduce the initial torque and current surge when starting an AC electric motor. It achieves this by gradually increasing the voltage applied to the motor over a defined period. This controlled start minimizes mechanical stress on machinery and electrical stress on the power system. Soft starters are typically used for fixed-speed applications where a smooth start is desired, such as pumps and fans. They offer a cost-effective solution for motor starting compared to variable frequency drives (VFDs).