A soft starter, also called a flexible starter, is an electronic device that controls the start and stop of an electric motor.

Compared to traditional direct starting methods, soft starters can provide the correct voltage and current gradually during the starting process, thereby reducing impact and voltage fluctuations on the motor and extending the life of the motor, machine it can reduce the breakdown rate, reduce energy consumption as well as operating costs, and achieve more reliable and efficient start-stop control effects.

Soft starters have different functions and can be selected and adjusted according to different actual needs. For example, it can gradually increase the voltage and current during motor starting to avoid impact and large current when motor starts, reduce impact and damage to the power grid and increase electric stability consecutively. 

Additionally, a soft starter has the unique advantage of motorcycle protection. It can detect motor current, voltage, temperature, stall and other parameters, locating motor faults and abnormalities in real time and handling them to prevent damage and further hazards.