The actualities of ferrous charges consumption in converter steel-making plant at Liangang were introduced.

In order to reduce the loss of iron by blowing and the cost of ferrous charges consumption, increase the economical benefits, measures such as optimizing the raw feeding material structure, improving blowing process, implementing the less-slag operation etc.

This present paper through deduce the expression of ferrous charges consumption in theory,indicatetre target-aims on economical and technical interrelated with practice,and indicate the measures on decrease the ferrous charges consumption from the converter and continue-cast manufacture in First Steelmaking plant of Hangang Co.

In this papers introduces that some new technology and management way used in a practice of the decreasing hot iron consumption at the LD's steelmaking plant of the xianggang.

Vector control of induction motor based on series iron loss;

Model of induction machines considering iron loss and effects on vector controlc;

In order to analyze the influence of inverter on the loss of submersible motor,an simulation circuit of the inverter is established by MATLAB,then the voltage spectrum of high-order harmonic produced by the inverter is given,meanwhile the copper loss and iron loss which are brought in by the submersible motor s high-order harmonic component are calculated in this paper.

Analysis and calculation of iron losses in induction motors fed by inverters;

According to the basic character of induction motor used in vehicle, this paper proposes a field oriented control model considering the iron losses.