The VL7100 series universal open-loop vector frequency converter is a new generation universal product developed by Langqu Electric. The design adopts a straight golden ratio, with a rugged appearance and a strong sense of technology. The entire power range covers 4kW -800kW, supporting VF control and open-loop vector control. It is mainly aimed at supporting equipment such as centrifuges, extruders, industrial washing machines, and wire drawing machines in the domestic market, as well as the transformation needs of production lines in textile, injection molding, chemical fiber, cement, ceramics, and other industries, as well as large-scale project demands for fan and pump equipment in industries such as petrochemicals, oil refining, thermal power, water supply, and heating.