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Control principle

Soft start is a kind of starting mode between star triangle start and frequency conversion start, its function is more than star triangle start, less than frequency conversion start。Soft start is mainly to make the voltage at the motor end slowly rise during the start process, so as to control the starting current and torque of the motor, so that the motor can achieve the purpose of smooth start。

The principle of frequency conversion is to adjust the speed and frequency of the AC motor by changing the input power supply into an AC power conversion device with adjustable voltage and adjustable voltage。

Control function

Soft start is mainly to adjust the starting voltage of the motor, so that the motor starts smoothly to reduce the impact on the power grid and machinery。

Frequency conversion starting can not only reduce the impact on the power grid and machinery, but also adjust the frequency and motor speed。

The application range of frequency conversion start is more extensive than that of soft start, frequency conversion start covers the advantages of soft start, and has the function of adjusting frequency speed, reducing noise and other functions that soft start does not have。All in all, the function of frequency conversion startup is far superior to soft startup。