Popova I. The control of operation modes of induction motors under voltage asymmetry in electrical grid

Object - the process of an expense of isolation resource of induction motors at voltage grid asymmetry and different loading of working machines. The method - symbolical method of the analysis of electrical circles and method of research of linear circles. Theoretical and practical result - developed mathematical model of operation modes of induction motors at voltage grid asymmetry. That allows on factor of loading of working machine, in view of features of electric drive to estimate speed thermal deterioration of isolation of the induction motors. The device of developed which diagnoses of the group the induction motors at voltage grid asymmetry, provide inclucion symmetrical of device. inclusion of a facilitatiing mode of each motor at deep asymmetry of time end of technological process. The novelty - new method, which allows to estimate speed of an expense of a resource of isolation of motors from voltage grd asymmetry, factor a loading of the working machine, the new device of the control,diagnosing, simplifications of operation modes and protection of group induction motors is developed. The adoption - the device of diagnosing of operation modes introduced of a technological line mixing of forages ASK "Preslav" Pimorsky region, Zaporozky area. Field - the induction motors of technological line of agriculture production.