Similar to the frequency converter, its internal chip stores an acceleration value, or the value obtained by the manufacturer's test, the controller will follow the value to determine the speed increase, that is, even if you rotate the handle to the maximum, the controller will follow the preset value to increase the speed, to achieve a smooth start and acceleration function
There are a lot of switch tubes on it, just think of it as a switch, by changing the time of the switch, and the time between each switch to turn on the soft start