(1) metallurgical industry demand for large motor: need high power motor drive the fan in the process of smelting steel and other metal materials occupies an extremely important position. From ore to produce steel smelting ore sintering and ironmaking and steelmaking and other major smelting process, the whole process of iron and steel smelting need fan.

(2) the petrochemical industry demand for soft start cabinet: the application and development of gas compressor in the petrochemical industry, gas compressor is to compress the gas, can produce gas compression equipment. For delivery is the purpose of the compressed gas or gas separation. Gas compressor is the key equipment of petrochemical plant, the majority of petrochemical plant have gas compressor. There are usually used centrifugal compressor, reciprocating compressor, screw compressor, etc.

(3) building materials industry, the demand for soft start cabinet: our country is building materials production power, cement, plate glass and ceramic products of production first in the world. Among them, the statistical production more than 1.3 billion tons of cement and the growth rate is above 10%; Foreign exchange earning $14.5 billion, an increase of 15% or so. Cement manufacturing total energy consumption accounts for 75% of the building materials industry. In the next 10 years, China's building materials industry will be higher than 3 to 4% of the national economy development speed. Cement enterprise from crushing, grinding materials, coal mines, preheater fan of kiln head, clinker grinding, air compressor and so on all need big motor, motor power consumption accounts for more than 90% of the electricity consumption of cement enterprises. Glass production enterprise demand for large and medium-sized motor also many.

(4) the chemical industry's need for soft start cabinet: both chemical fertilizer industry and coal chemical industry, both need a great deal of compressor, fan, water pump and ball mill, etc.

(5) other industry demand for soft start cabinet, with the further development of environmental protection industry, renewable material papermaking industry as springing up vigorously. Wood pulp and paper industry is inseparable from the large-scale pulping machine, and the international implementation on the small-scale papermaking companies' clearance, stop, turn and, after the measures, make the rest of the large and medium-sized papermaking enterprises some large drive motor power is controlled in 6000-20000 - kw, these equipment can use high pressure drop solid soft start device to start.