Based on the quantitative analysis,the calculation formulas of additional loss of wire caused by unbal-anced operation are derived,and the close relationship of the additional loss of wire with the phase sequence of connection are pointed out;A simple method to reduce the additional loss of wire is presented;It is proved that the method is available and effective by practical examples.

On the basis of armature MMF analysis, an approach to calculate additional loss on rotor surface of six.

This paper presents an eddy current field calculation method of additional loss in transformer based on 3D finite element analysis in order to accurately calculate and control the additional loss.

Because of solid structure,surface eddy losses caused by harmonic mainly contribute to stray loss.

Calculations of additional copper loss with disharmonious power factor and harmonious compensation for several transformers;

Analysis of the excess loss of fused-tapered PANDA fiber couplers;

All the excess losses are 0.

Compared with the traditional design of MMI,interference region,input and output waveguides of the MMI power splitter take the shape of reverse taper,then not only the dimension of the splitter and the excess loss is reduced sharply,but also the uniform is en- hanced greatly.