Control principle
Air compressor soft start
It is a starting method between star-delta start and variable frequency start. It has more functions than star-delta start and fewer functions than
variable frequency start. Soft start mainly causes the voltage at the motor end to slowly increase during the starting process, thereby controlling
the starting current and torque of the motor, so that the motor can start smoothly.
Air compressor frequency conversion start
The principle is to convert the input power supply into an AC power conversion device with adjustable voltage and adjustable frequency, and adjust
the speed and frequency of the AC motor by adjusting the frequency and voltage.
Control function
Soft start mainly adjusts the starting voltage of the motor so that the motor starts smoothly to reduce the impact on the power grid and machinery.
Variable frequency starting can not only reduce the impact on the power grid and machinery, but also adjust the frequency and motor speed.
Summarize
The application scope of variable frequency start is wider than that of soft start. Variable frequency start covers the advantages of soft start,
and has functions such as adjusting frequency and speed, reducing noise, etc. that soft start does not have. All in all, the function of variable frequency start is far better than that of soft start.