To improve the stepping motor torque-frequency characteristic,a kind of double voltage driving circuit with feedback control for stepping motor was designed and discussed.

This paper gives out the torque-frequency characteristic curve equation of stepping motor based on the basic power interface circuit of stepping motor, carries out computer simulation and proves its correctness in condition of no magnet saturation.

In this paper on the basis of introducing the classify of track irregularity and analyzing irregularity models of other countries,a method to use characteristic matrix to describe track deformation is introduced.

Based on the characteristic matrix of a lamellar structure, a matrix method about thermal wave transmission and reflection coefficients is presented, and a calculating formula for photothermal radiometry signal of the multilayer media is given.

This paper analyzes the power character and torque character for frequency conversion timing AC motor,and the power character and torque character for the spiddle of machine tool whose main movement is rotation.

The torque characters of the direct-drive wheel motor applied in electric vehicle are summarized.

Study on the torque characteristic of two-phase SR motor;

The methods of measuring the characteristics of switched reluctance motor (SRM), including the flux and the static torque characteristics, are discussed.