The high-voltage motor soft starter is composed of multiple thyristors connected in series and parallel. It adopts the latest power electronic control technology. By adjusting the conduction angle of the thyristors, the purpose of controlling the motor start-up is achieved.
From the working diagram of the thyristor above, we can clearly see that when the initial voltage is very small, the output voltage is very low. As time goes by, the voltage on the output side keeps rising until it reaches the rated voltage of the motor. This reduced-voltage starting method effectively reduces the damage to the motor caused by direct starting and is an ideal reduced-voltage starting device.
During the startup process, the voltage and current ramp startup curve can be selected based on the static torque of the load. For loads with large resistance torque, jump startup can be added. As the startup voltage continuously increases, the terminal voltage of the motor also keeps rising. When the voltage reaches the input voltage, it switches to the bypass contactor operation, and the high voltage motor soft starter acts as the detection unit to protect the motor and the driven load. During the motor starting process, the soft starter monitors the starting current in real time and keeps it below the set limit current.
Compared with traditional methods such as star-delta starting and autotransformer reduced-voltage starting, soft starters have very obvious advantages. The output is continuously adjustable from 0 to 100%. During the start-up process, the current is effectively controlled and always limited within the set current-limiting multiple. It features a very complete motor protection mechanism, providing comprehensive protection for the motor and its load.
Noker Electric adopts the latest power electronic control technology and designs high-voltage soft starters based on years of industry application experience. These products feature reliable quality and superior performance, and have received high praise from a wide range of customers.
Post time: Jan-14-2025