What exactly does a frequency converter do? ? What does crew mean? ? ?

Frequency converter: A device that changes the power supply frequency of the motor and adjusts the motor speed. It’s hard to say about the unit. There are many types of units.: Generator units, hydraulic turbine units, compressor units, steam turbine units, etc.

n=120f (1-s)/pn is the motor speed； f is the power frequency ； p is the number of magnetic poles of the motor ； s is slip, so the brother upstairs can adjust the motor speed by changing the power frequency. The crew didn't understand.

The inverter is a device that converts industrial frequency power supply (50Hz or 60Hz) into AC power supply of various frequencies to achieve variable speed operation of the motor. The control circuit completes the control of the main circuit, the rectifier circuit converts AC power into DC power, the DC intermediate circuit smoothes and filters the output of the rectifier circuit, and the inverter circuit inverts DC power into AC power. For inverters that require a lot of calculations, such as vector control inverters, sometimes a CPU for torque calculation and some corresponding circuits are needed. Variable frequency speed regulation achieves the purpose of speed regulation by changing the frequency of power supply to the motor stator winding. unit ； Several moving equipment combinations work together to complete specific functions, such as generator sets, compressor units, etc.