The main functions of a soft starter include the following aspects:

Smooth start and soft stop: The soft starter achieves smooth start and soft stop functions by controlling the input voltage and current of the motor. Compared with traditional step-down starters, soft starters gradually increase the input voltage and current of the motor during the starting process, avoiding sudden changes in surge current and voltage during startup, thereby reducing the impact on the power grid and motor, and lowering the equipment failure rate.

Reduce starting current and distribution capacity: Soft starters gradually increase voltage during motor start-up, thereby reducing starting current and avoiding investment in grid capacity expansion. This gradual increase in voltage can effectively reduce the starting stress of the motor and load equipment, and extend their service life.

Multiple protection functions: The soft starter has multiple protection functions, such as overload protection, phase loss protection, short circuit protection, etc., which can effectively protect the safety of the motor and related equipment.

Suitable for frequent start stop situations: Soft starters are suitable for controlling equipment such as pumps, fans, compressors, etc. Its smooth start and stop process reduces equipment wear and failure rates.

Multiple starting modes: The soft starter can choose different starting modes according to the load situation, such as ramp boost soft start, ramp constant current soft start, step start, etc. These modes adapt to different load requirements and ensure smooth starting of the motor.

Working principle: The soft starter controls the conduction angle of the thyristor to gradually increase the input voltage of the motor from zero in a preset function relationship until the start is complete. During the start-up process, the torque and speed of the motor gradually increase, avoiding the impact and vibration during start-up.

Application scenario: Soft starters are widely used in various devices that require frequent start stop control, such as fans, pumps, and other loads. Its smooth start and stop process reduces equipment wear and maintenance costs.