4, compressor load:
Compressors are also widely used. Low-pressure compressors are widely used in various industrial sectors, and high-pressure large-capacity compressors have more applications in steel (such as oxygen generators), mines, fertilizers, and ethylene.
The use of frequency conversion speed regulation brings advantages such as small starting current, power saving and optimized equipment service life.

5, rolling mill load:
In the metallurgical industry, AC-AC frequency converter was used in large rolling mills in the past, and AC-DC-AC frequency converter was used in recent years, and AC-AC mill has been a trend, especially in light load rolling mills.
For example, the multi-frame aluminum rolling unit of Ningxia Ethnic Aluminum Products Factory uses a general frequency converter to meet the low frequency load start, synchronous operation between racks, constant tension control, simple and reliable operation.