Development of advanced winding condition control technology of electric motors based on pulsed method

More than 80 percent of all electrical energy customers are electric motors. Therefore one of the
prospects of resource-effective technologies in power industry is control of rotating electric equipment
condition. Winding defects are one of the main causes of electric motor failures. Reliable control of winding
condition is an urgent task of modern electrical engineering technology. The present article is devoted
to the research of pulsed method application of transformer winding control for electric motor winding
condition control. The procedure of winding condition control technology is described. The proposed
method is based on the known pulsed method. The essential difference between the two methods is that
only one probing impulse is used which is a probing impulse and response signal at once. The results
of diagnostic procedure research at different winding defects are given. It is established that the place of
winding damage corresponds to characteristic impulse changes. The defect of definite types causes specific
changes of the probing impulse form. Therefore, different winding defects could be found with high
accuracy along winding.