Soft starters are electronic devices used to control the acceleration of electric motors. Unlike traditional direct-on-line starters that immediately apply full voltage to the motor, soft starters gradually ramp up the voltage and current supplied to the motor during startup, which reduces mechanical and electrical stress on the system.

The primary function of a soft starter is to limit the inrush current that occurs when a motor is started, thereby preventing voltage sags and reducing wear and tear on mechanical components. By smoothly increasing the voltage, soft starters help prevent sudden jerks and shocks to the motor and connected machinery, improving operational efficiency and extending equipment lifespan.

Soft starters offer several advantages, including smoother startup, reduced mechanical stress, and lower energy consumption compared to traditional starting methods. They are commonly used in applications where controlled acceleration and deceleration are crucial, such as conveyor systems, pumps, fans, and compressors.

Soft starters come in various configurations and can be customized to suit specific motor and application requirements. They typically incorporate microprocessor-based control systems that allow for precise adjustment of acceleration and deceleration parameters, making them versatile solutions for a wide range of industrial and commercial applications.