Kuznetsov V. IncMeans of increase of an energy efficiency of asynchronous motors working in networks with the unquality electric power

The dissertation is devoted to development of the basic scientific provisions concerning creation of a methodology's choice of effective and economically reasonable remedies of asynchronous engines which work in specific shop networks with the unquality electric power. The likelihood model of tension in shop networks of industrial enterprises is created. Check of developed digital model linear strains in the shop power supply network of public corporation "Ukrspetsservice" showed that statistical characteristics of harmonicas which are generated, slightly differ from hypothetical therefore, the model adjusted by this image can be considered as the adequate. Use of aforementioned analog in a shop electric network with the unquality electric power allows to estimate on the basis of computing researches an energy efficiency the asynchronous motor which in it work. It is shown that reducing service life of isolation the asynchronous motor can be predicted on the basis of an indirect assessment of determination of its temperature during the operation received by means of one-mass dynamic thermal model synthesized in work heating losses in which calculate by means of electromagnetic model for a daily cycle of operation the asynchronous motor, taking into account likelihood characteristics of indicators of electric power's quality. The methodology's choice of economically reasonable remedies the asynchronous motor and total calculation's algorithm of an economic damage of the asynchronous motor which working in the conditions of the unquality electric power are allowed to make economically reasoned decision on a choice of means of compensation of the unquality electric power's negative impact on technical and economic indicators the asynchronous motor which is accepted proceeding from comparison of size of a damage, cost of the electric motor and the offered means of its protection. The aforementioned design procedure of a loss, considers increase in electricity consumption by the engine, and also reducing service life of its isolation as a result of an overheat caused by the unquality electric power.