The electrical control of the screw air compressor with the frequency converter can be divided into two systems: one for the internal control system and the other for the starter disk. The starter disk is controlled by the Y-△ starter commonly used in general motors. The control part is electronically controlled, and the electronic control part is complicated due to internal wiring and control.
Main items in frequency conversion operation:
1. Screw air compressor frequency conversion start:
The controller controls the inverter output frequency to rise from 0Hz to 50Hz, and the number of motor revolutions runs from 0 to the rated number of revolutions. During this period, the intake valve is opened, the bleed valve is closed, the bleeder solenoid valve is energized, and the pressure in the oil and gas tank rises.