motor soft starter
The so-called soft start of the motor essentially means that the motor gradually increases to the normal operation state at the start of the lower current, which has significant advantages for reducing the impact of the power grid, reducing the load of the transformer and the control circuit, and improving the service life of the equipment.When a general AC motor is directly started, the starting current is 6-10 times the trial running current, but after using soft start technology, the starting current is reduced to 1-3 times.
The soft start of the motor mainly adopts the following methods:
1. Reduce the power supply voltage to start, , usually using 40% voltage to start, and then slowly increase it until the power frequency voltage is reached.
2. Reduce the power frequency to start, usually adjusting from 1-50HZ power frequency range.
This method not only effectively limits the starting current, but also precisely controls the starting process and speed of the motor according to actual needs. It is very suitable for applications that require precise control.
3. Limiting current start, also known as current limiting start, is a better mode for high load starting.
