Soft starter is a motor control device that integrates motor soft start, soft stop, light load energy saving and a variety of protection functions. Here’s a detailed explanation of the soft starter:

Definitions & Functions：

Definition: A soft starter is a motor control device designed to achieve smooth starting and stopping of the motor, as well as a variety of protection functions.

Key features:

Soft start: During the entire starting process, the motor can start smoothly without shock, reducing the impact on the power grid and related equipment.

Soft stop: In contrast to soft start, the motor is able to smoothly decelerate and gradually stop to avoid the torque impact caused by free stopping.

Light load and energy saving: When the motor is lightly loaded, the soft starter can reduce the energy consumption of the motor and improve the energy efficiency.

A variety of protection functions: the soft start appliance has a variety of protection functions such as overcurrent, overvoltage, undervoltage, and overheating to ensure the safe operation of the motor.

How it works

Main composition: The soft starter is mainly composed of three opposite parallel thyristors and its electronic control circuit connected in series between the power supply and the controlled motor.

Working mode: By controlling the conduction angle of the three opposite parallel thyristors, the input voltage of the controlled motor changes according to different requirements, so as to achieve different functions. During the start-up process, the input voltage of the motor gradually rises to make the motor start smoothly; During the parking process, the input voltage of the motor gradually decreases, making the motor stop smoothly.

merit

Reduced shock: Soft starters can significantly reduce the impact on the power grid and related equipment when the motor is started and stopped, and extend the life of the equipment.

Energy saving: When the motor is lightly loaded, the soft starter can reduce the energy consumption of the motor and improve the energy efficiency.

Adjustable parameters: The parameters in the starting process can be adjusted according to the characteristics of the motor load, such as current limiting value, starting time, etc., to achieve the best starting effect.

Fields of application

Soft starters are widely used in various occasions that require motor starting and stopping, such as industrial production lines, water pumps, fans, compressors, etc. At the same time, with the advancement of science and technology and the improvement of people’s requirements for equipment performance, soft starters have also been widely used in mobile devices, smart homes, automobiles and other fields.