It primarily consists of rectification (AC to DC), filtering, inversion (DC to AC), braking units, drive units, detection units, and microprocessor units.

Variable frequency drives (VFDs) adjust the output voltage and frequency by switching internal power devices, providing the motor with the exact voltage it requires based on its actual needs, thereby achieving energy savings and speed control.

Additionally, VFDs feature numerous protective functions, such as overcurrent, overvoltage, and overload protection. With the continuous advancement of industrial automation, VFDs have found widespread application.

Applications: Variable frequency speed control for arc welders, constant-pressure water supply systems, various types of fans, central air conditioning systems, and hydraulic pumps. In equipment such as pumps, refrigeration systems, injection molding machines, and ventilation systems, VFDs enable intelligent control and energy-saving optimization.