The Research And Design On The Frequency Conversion Table Electrical Machinery Of Accessorial Drive For Metallurgy

In order to improving the output and quality of steel,promoting the development of our national economy, reducing the differences between with development countries, Technological transformations have largely been carried out in Our country steel and iron profession. In the technological transformations, the frequency conversion table electrical machines are used in the rolling mill auxiliary transmission. But reflected from many steel mills using situation , many electrical machinery performances are not ideal, even many frequency conversion electrical machinery's life is only half year to 1 year, even only 3 months. in view of this situation this article has conducted research to the design of metallurgy auxiliary biography with the frequency conversion table electrical machineryFirst multianalysis to the frequency changer and the frequency conversion table electrical machinery movement characteristic is carried out, the voltage waveform harmonious which the frequency changer outputs is big, attacks in a big way, and the voltage climbing rate reaches as high as 6600v/Mu s which is 20 times ordinary sine alternating voltage, the rolling mill auxiliary biography table set the extremely strict request to the electrical machinery; Its movement frequency is very low, rate frequency in 8-20Hz; the Velocity modulation scope is wide, the lowest movement frequency lowers to 1Hz,and the starting number of times is quite frequently, each hour reaches as high as 600-800 time, the impact shoulders in a big way, the overload capacity request is high.Next, based on analyses of the frequency conversion power source harmonious and the frequency conversion table electrical machinery movement characteristics , utilizing the new design thought, this article has conducted the system analysis research to the frequency conversion table electrical machinery design. the prototype experiment confirmed the analysis accuracy. It was consider that the trough coordination of the frequency conversion electrical machinery should adopt the far trough coordination which the stator slots number to be many but rotor slots number to be few. The rotor trough suitably be shallow and wide;...